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Tüm alıştırma soruları

3551 soru

Tüm türler3,551Çoktan seçmeli1,809Çoklu seçim786Sayısal12Eşleştirme521Sıralama423
Soru 3141Soru →

A field consultant traveling internationally reports two network connectivity issues on a corporate tablet: cellular data services are unavailable despite having strong signal bars, and connecting to the hotel guest Wi-Fi results in an IP address of 169.254.10.15, preventing intranet access. Which TWO of the following steps should the technician perform to address these connectivity issues?

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Cevap: Verify and enable cellular data roaming in the mobile device settings.; Reconfigure the Access Point Name (APN) settings to match the enterprise carrier requirements.

Cevap

The technician should enable cellular data roaming in the device settings and reconfigure the Access Point Name (APN) settings to match enterprise carrier requirements.
Enabling cellular data roaming allows mobile devices to access data services on foreign networks when traveling internationally. Furthermore, ensuring correct APN settings guarantees proper authentication and gateway routing with the cellular carrier for data communication.

Adım Adım Çözüm

1
Analyze cellular network failure while roaming.
Identified that international data access requires data roaming permissions and valid APN gateway parameters.
Without enabling cellular data roaming and defining correct APN configurations, the device cannot establish data tunnels on partner carrier networks.
2
Analyze Wi-Fi connectivity symptom (169.254.10.15 address).
Recognized APIPA assignment resulting from failure to obtain a DHCP lease on the public Wi-Fi network.
APIPA addresses indicate DHCP failure or captive portal obstruction, requiring Wi-Fi connection reset or DHCP troubleshooting rather than static APIPA configuration.

Anahtar Kavram

Mobile Data Roaming, Access Point Name (APN) Configuration, and APIPA Recognition
Soru 3142Soru →

A desktop specialist is upgrading the internal storage on a fleet of mobile workstations. The specialist installs new M.2 SATA solid-state drives into the motherboard M.2 slots, but upon booting into the UEFI, none of the drives are detected in the storage inventory. The drive modules fit into the slots without physical resistance. Which of the following is the most likely cause of this issue?

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Cevap: The motherboard M.2 slots are wired exclusively for the PCIe/NVMe protocol, rendering SATA-based M.2 drives incompatible despite the physical fit.

Cevap

The motherboard M.2 slots are wired exclusively for the PCIe/NVMe protocol, rendering SATA-based M.2 drives incompatible despite the physical fit.
The correct answer correctly identifies that while M.2 is a physical form factor specification, the underlying electrical interface can be either SATA or PCIe (NVMe). If a laptop's motherboard slot is wired strictly for PCIe/NVMe drives, installing an M.2 SATA drive results in the drive not being detected by the system firmware, even though it fits into the slot.

Adım Adım Çözüm

1
Identify the physical form factor and logical interface bus of the replacement drives.
The replacement drives use the M.2 physical form factor with a SATA bus interface.
M.2 describes the physical pin arrangement and card dimensions, while SATA or PCIe (NVMe) specifies the data transfer protocol.
2
Check the motherboard specification for M.2 slot protocol compatibility.
The motherboard M.2 expansion slot supports PCIe/NVMe traffic only.
If the slot host controller does not route SATA controller lanes to the slot, SATA drives will remain unpowered or unreadable by the BIOS/UEFI.
3
Select the correct resolution for drive detection.
Replace the M.2 SATA drives with M.2 NVMe (PCIe) drives.
Matching both the physical card size and the supported logical protocol ensures full hardware detection in the system firmware.

Anahtar Kavram

M.2 Form Factor vs. Storage Protocol Compatibility (NVMe vs. SATA)
Soru 3143Soru →

A network technician is troubleshooting a workstation that cannot access resources on remote subnets or resolve domain names. The technician runs `ipconfig /all` on the workstation and receives the following output:

IPv4 Address: 169.254.184.22
Subnet Mask: 255.255.0.0
Default Gateway:
DNS Server: 10.10.1.5

Which TWO of the following statements accurately explain the host's current networking state and the required corrective actions? (Select TWO.)

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Cevap: The host automatically generated an APIPA address because it was unable to contact a DHCP server to obtain an IP lease.; The host cannot communicate with the configured DNS server at 10.10.1.5 because it lacks a valid routable IP configuration and default gateway.

Cevap

The host automatically self-assigned an APIPA address because it could not contact a DHCP server, and it cannot communicate with the DNS server at 10.10.1.5 due to lacking a routable IP address and default gateway.
The presence of a 169.254.x.x IPv4 address indicates that the host attempted dynamic configuration but failed to reach a DHCP server, causing the operating system to self-assign an APIPA address. Furthermore, because APIPA addresses are link-local non-routable addresses and no default gateway is assigned, the client cannot communicate beyond its local segment to access the DNS server located at 10.10.1.5.

Adım Adım Çözüm

1
Analyze the IP address output
The IP address 169.254.184.22 belongs to the Automatic Private IP Addressing (APIPA) range (169.254.0.0/16).
When a host configured for dynamic IP addressing fails to receive a DHCP response, the operating system self-assigns an APIPA address.
2
Evaluate network routability and gateway configuration
APIPA addresses are non-routable link-local addresses, and the Default Gateway field is empty.
Without a valid routable IP address and default gateway, IP packets cannot leave the local Layer 2 broadcast domain to reach remote IP targets such as 10.10.1.5.
3
Differentiate server responsibilities and routing requirements
DHCP (not DNS) leases IP configurations, and routers (Layer 3 devices, not Layer 2 unmanaged switches) interconnect subnets.
Confusing DNS/DHCP server roles or Layer 2/Layer 3 boundaries leads to incorrect diagnostic conclusions.

Anahtar Kavram

APIPA functionality, link-local routing limitations, and distinguishing DHCP vs DNS roles
Soru 3144Soru →

A IT infrastructure consultant is setting up legacy macOS workstation compatibility on an enterprise network segment. The environment requires file transfer services via Apple Filing Protocol (AFP) as well as automated local network resource discovery via Service Location Protocol (SLP). Which TWO of the following port numbers must be permitted through internal host firewalls to allow these two services to function properly?

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Cevap: TCP port 548; TCP and UDP port 427

Cevap

The correct ports to permit are TCP port 548 for Apple Filing Protocol (AFP) and TCP/UDP port 427 for Service Location Protocol (SLP).
Apple Filing Protocol (AFP) operates on TCP port 548 to provide native file sharing capabilities for macOS endpoints. Service Location Protocol (SLP) operates on TCP and UDP port 427, allowing network devices to advertise and locate resources such as file shares and printers without prior manual configuration.

Adım Adım Çözüm

1
Identify the required network service for file transfers on legacy macOS clients.
The specified protocol is Apple Filing Protocol (AFP), which standardizes network file sharing for macOS.
AFP operates over TCP on standard port 548.
2
Identify the required protocol for network resource discovery.
The specified protocol is Service Location Protocol (SLP), which allows network clients to discover services like printers and file shares.
SLP listens on port 427 using both TCP and UDP transport protocols.
3
Evaluate the distractor ports to eliminate incorrect protocol matches.
TCP 445 corresponds to SMB file sharing, and TCP 389 corresponds to LDAP directory queries.
Neither SMB (445) nor LDAP (389) satisfies the specific requirement for AFP and SLP.

Anahtar Kavram

Apple Network Services & Discovery Port Mappings (AFP and SLP)
Tahmini Süre:1m 30s
Soru 3145Soru →

Employees at a corporate office report that while they can successfully receive emails from external partners, all attempts to send outgoing messages to external domains fail with a connection timeout. An IT technician checks the firewall logs and discovers that outbound traffic on TCP port 25 is being dropped at the network perimeter. Which of the following network host service roles is directly responsible for routing these outbound email transmissions?

Cevabı ve açıklamayı göster

Cevap: Mail server

Cevap

Mail server
A mail server utilizes Simple Mail Transfer Protocol (SMTP) over TCP port 25 to send and relay outbound email messages across the internet. When TCP port 25 is blocked at the edge firewall, outbound email delivery fails while inbound retrieval protocols (such as IMAP or POP3) remain unaffected.

Adım Adım Çözüm

1
Analyze the technical issue and blocked traffic details.
Outbound email transmission is failing because TCP port 25 traffic is blocked by the perimeter firewall.
Identifying TCP port 25 clarifies which host protocol and service role is affected.
2
Associate TCP port 25 with the matching network service protocol.
Simple Mail Transfer Protocol (SMTP) operates on TCP port 25.
SMTP is the standard protocol for sending and relaying mail between mail servers.
3
Identify the server role that runs SMTP service for outbound mail delivery.
The mail server is the network host role responsible for outbound email transmission.
Unblocking port 25 restores the mail server's capability to transfer mail to external domains.

Anahtar Kavram

Mail Server Roles and SMTP Protocol (Port 25)
Soru 3146Soru →

A field technician is troubleshooting a corporate laptop that is experiencing power issues. The laptop requires a 90W power source for full operation, but the user is currently powering it with a compact 45W USB-C Power Delivery (PD) adapter. When running resource-intensive applications, the user notes that the battery charge percentage slowly decreases even though the laptop is continuously plugged in. Additionally, the user asks if performing a complete 0% deep discharge every evening will extend the life of the laptop's Lithium-ion battery. Which of the following provides the most accurate diagnosis and recommendation?

Cevabı ve açıklamayı göster

Cevap: The 45W charger provides insufficient power under peak operational load, forcing the system to draw supplementary power from the battery, and modern Lithium-ion batteries should not be deeply discharged as it speeds up battery capacity degradation.

Cevap

The 45W charger provides insufficient power under peak operational load, forcing the system to draw supplementary power from the battery, and modern Lithium-ion batteries should not be deeply discharged as it speeds up battery capacity degradation.
When a laptop requires 90W but is connected to a lower-rated 45W power supply, the laptop will function, but under high compute loads it consumes more power than the charger can provide. To sustain operations, the power subsystem draws the remaining energy from the battery, causing gradual depletion. Furthermore, modern laptops use Lithium-ion batteries, which benefit from partial charge cycles rather than full 0% discharges, as deep discharges cause chemical stress and shorten lifespan.

Adım Adım Çözüm

1
Analyze system power requirements vs power delivery adapter output.
The laptop requires 90W, but only 45W is supplied by the connected USB-C adapter. Under high processing loads, system power consumption exceeds 45W.
When total system draw exceeds the adapter output capacity, the laptop uses hybrid power delivery, pulling additional power from the internal battery to prevent shutdown.
2
Evaluate the battery maintenance question regarding deep discharges for Lithium-ion chemistry.
Lithium-ion (Li-ion) batteries do not suffer from the memory effect found in legacy Nickel-Cadmium (NiCd) batteries. Deep discharges stress Li-ion cells and decrease overall cycle life.
Li-ion batteries perform best with shallow discharge cycles and partial charging rather than 0% deep discharges.

Anahtar Kavram

Laptop USB-C Power Delivery Wattage Requirements and Lithium-ion Battery Maintenance
Soru 3147Soru →

A technician is setting up a wireless Bluetooth peripheral connection between a smartphone and a hands-free headset for an employee to use at their desk. Which of the following network types best classifies this connection?

Cevabı ve açıklamayı göster

Cevap: Personal Area Network (PAN)

Cevap

Personal Area Network (PAN)
A Personal Area Network (PAN) is specifically designed for short-range communication between personal devices, such as pairing a Bluetooth headset to a mobile smartphone within a personal workspace radius.

Adım Adım Çözüm

1
Analyze the physical scope and technology involved in the scenario.
The connection uses Bluetooth to link personal devices over a very short distance (a few meters) around an individual's workspace.
Identifying the coverage radius and device interaction determines the appropriate network scope standard.
2
Match the scope characteristics to the standard network classifications.
Short-range wireless connections between personal accessories and mobile devices are classified as a Personal Area Network (PAN).
PANs are specifically defined as small-scale networks centered around an individual device owner.

Anahtar Kavram

Personal Area Network (PAN) Classification
Soru 3148Soru →

A network technician is preparing documentation for a wireless infrastructure review. Which IEEE 802.11 wireless standard matches each set of frequency bands and key technical capabilities?

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Öğeler

IEEE 802.11b
IEEE 802.11a
IEEE 802.11ac
IEEE 802.11ax

Eşleşmeler

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Cevap

IEEE 802.11b matches the 2.4 GHz band with 11 Mbps maximum speed; IEEE 802.11a matches the 5 GHz band with 54 Mbps maximum speed; IEEE 802.11ac matches the 5 GHz band with MU-MIMO; and IEEE 802.11ax matches the 2.4 GHz, 5 GHz, and 6 GHz bands with OFDMA.
Each wireless standard has defining frequency and performance specifications: 802.11b operates strictly at 2.4 GHz (up to 11 Mbps); 802.11a operates strictly at 5 GHz (up to 54 Mbps); 802.11ac operates on 5 GHz with MU-MIMO support; and 802.11ax spans 2.4 GHz, 5 GHz, and 6 GHz spectrums utilizing OFDMA technology.

Adım Adım Çözüm

1
Identify the operating characteristics of 802.11b
802.11b pairs with the 2.4 GHz band and 11 Mbps theoretical throughput.
802.11b was designed exclusively for the 2.4 GHz ISM band.
2
Identify the operating characteristics of 802.11a
802.11a pairs with the 5 GHz band and 54 Mbps theoretical throughput.
802.11a was designed exclusively for the 5 GHz UNII band.
3
Identify the operating characteristics of 802.11ac
802.11ac pairs with 5 GHz exclusive operation and downlink MU-MIMO.
802.11ac transfers data frames strictly over the 5 GHz frequency band.
4
Identify the operating characteristics of 802.11ax
802.11ax pairs with 2.4 GHz, 5 GHz, and 6 GHz spectrum support alongside OFDMA.
802.11ax extends coverage across three frequency bands and introduces OFDMA for efficient channel sub-carrier allocation.

Anahtar Kavram

Wireless 802.11 standards frequency allocations, maximum theoretical speeds, and key features
Soru 3149Soru →

A systems administrator is manually configuring a static IPv4 network interface on a new database server intended for the company subnet 10.50.12.0/2410.50.12.0/24. The administrator enters the following settings on the server:

- IP Address: 10.50.12.1510.50.12.15
- Subnet Mask: 255.255.255.128255.255.255.128
- Default Gateway: 10.50.12.25410.50.12.254

During initial testing, the server successfully pings local workstation addresses such as 10.50.12.5010.50.12.50, but cannot communicate with hosts on other VLANs or access the corporate internet gateway. Which of the following identifies the root cause of this connectivity failure?

Cevabı ve açıklamayı göster

Cevap: The configured subnet mask places the default gateway address on a different logical network segment, rendering it local-subnet unreachable.

Cevap

The configured subnet mask places the default gateway address on a different logical network segment, rendering it local-subnet unreachable.
The correct answer identifies that a subnet mask of 255.255.255.128 (/25) restricts the host's local network segment to the range 10.50.12.0 - 10.50.12.127. Because the default gateway IP is set to 10.50.12.254, the server evaluates the gateway address as being on a remote network. As a result, the server cannot ARP for the gateway MAC address locally, preventing any off-subnet traffic forwarding while allowing communication with local hosts in the 10.50.12.1 - 10.50.12.126 range.

Adım Adım Çözüm

1
Analyze the configured IP address and subnet mask.
The IP address is 10.50.12.15 with a subnet mask of 255.255.255.128 (/25 prefix).
Determines the boundaries of the host's local IP subnet.
2
Calculate the usable host address range for the host's subnet.
The subnet range for 10.50.12.15/25 is 10.50.12.0 to 10.50.12.127 (usable host addresses: 10.50.12.1 to 10.50.12.126).
A 255.255.255.128 mask divides a /24 classful block into two 128-address subnets.
3
Compare the configured default gateway address against the local subnet range.
The configured gateway (10.50.12.254) belongs to the adjacent subnet (10.50.12.128/25 range 10.50.12.128 to 10.50.12.255).
A default gateway must reside within the same local IP subnet as the host interface to receive and forward off-subnet traffic.

Anahtar Kavram

Subnet Mask and Default Gateway Boundary Matching
Soru 3150Soru →

Match each laptop display component to its correct primary function or technological characteristic.

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Öğeler

Inverter Board
Digitizer
OLED Display
Wi-Fi Antenna Harness

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

Inverter Board matches converting DC power to AC power for CCFL backlights; Digitizer matches translating physical screen touches into digital input signals; OLED Display matches emitting light per-pixel organically without needing a separate backlight; Wi-Fi Antenna Harness matches routing through the display bezel to maximize wireless transceiver height.
Each display assembly component serves a unique functional role in laptop operation: inverter boards supply AC voltage to CCFL tubes, digitizers process touchscreen inputs, OLED panels generate self-illuminating images, and antenna harnesses route wireless signals to the top lid.

Adım Adım Çözüm

1
Identify the power conversion function of an inverter board
Inverter converts DC to high-voltage AC for CCFL backlights.
Legacy CCFL backlights operate on AC voltage, whereas the laptop motherboard supplies DC power.
2
Identify the touch sensing component
Digitizer processes tactile user interactions.
The digitizer glass layer converts physical touches on touchscreen displays into computer input signals.
3
Identify the backlight requirement of OLED displays
OLED technology requires no backlight or inverter board.
OLED pixels generate light independently when energized, allowing thinner displays and deeper black levels.
4
Identify the location and function of the antenna wires
Wi-Fi antenna leads are routed through the display bezel.
Placing antenna wires in the upper screen assembly provides maximum spatial elevation for optimal wireless performance.

Anahtar Kavram

Laptop Display Assembly Components and Features
Soru 3151Soru →

A field technician needs to establish a direct local management session from a legacy maintenance laptop featuring a DB-9 serial port to the RJ45 console port of a newly mounted network switch. Which cable type should the technician use to successfully establish this management connection?

Cevabı ve açıklamayı göster

Cevap: DB-9 to RJ45 rollover cable

Cevap

The technician should use a DB-9 to RJ45 rollover cable to connect the DB-9 serial interface on the workstation to the switch's RJ45 console port.
Connecting a computer's serial port (DB-9) to a router or switch management port (RJ45) requires a rollover cable (or serial console cable). This cable properly routes serial transmit and receive signals to establish out-of-band terminal management.

Adım Adım Çözüm

1
Identify the ports on both host and target devices
The host laptop has a 9-pin D-subminiature (DB-9) serial port, while the switch management interface is an RJ45 console port.
Out-of-band administrative access requires matching host serial signaling with target console pinouts.
2
Select the appropriate serial conversion cable type
Choose a DB-9 to RJ45 rollover (console) cable.
Rollover cables roll the pin positions from one end to the other to correctly pair transmit (TX), receive (RX), and ground pins between DB-9 serial controllers and RJ45 console interfaces.

Anahtar Kavram

Serial and Console Cable Standards
Soru 3152Soru →

A network technician is organizing the equipment room for a newly expanded office floor. Match each network hardware device to its primary functional description within the network infrastructure.

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Öğeler

Managed Layer 2 Switch
Patch Panel
PoE Injector
Media Converter

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

Managed Layer 2 Switch connects to the description involving MAC address frame forwarding and VLAN support; Patch Panel connects to passive cable termination from wall outlets; PoE Injector connects to adding electrical power to Ethernet runs for non-PoE switches; Media Converter connects to transitioning signals between copper UTP and fiber cabling.
Each hardware device performs a specific role: Managed Layer 2 switches handle MAC-based frame forwarding and VLAN management at Layer 2; patch panels act as passive Layer 1 cable organizers; PoE injectors insert power into Ethernet runs for non-PoE switches; media converters convert signals between copper and fiber physical media.

Adım Adım Çözüm

1
Analyze the role of a Managed Layer 2 Switch.
It directs Data Link layer frames using MAC addresses and enables VLAN configuration for traffic isolation.
Layer 2 switching relies on hardware address learning and port-level VLAN tagging.
2
Analyze the function of a Patch Panel.
It serves as a static cable management point terminating structured cabling runs without modifying network signals.
Patch panels contain no processing circuitry and act purely as physical connection hubs.
3
Determine the usage of a PoE Injector.
It combines data from a standard Ethernet port with DC power onto a single cable run.
This device is required when powering PoE end-devices via legacy or non-PoE network switch ports.
4
Identify the purpose of a Media Converter.
It converts electrical signals on copper cabling to light pulses on fiber-optic cable (or vice versa).
Media conversion overcomes copper distance limits (100 meters) by interfacing with fiber infrastructure.

Anahtar Kavram

Network Hardware Device Functions and OSI Layer Roles
Tahmini Süre:1m 30s
Soru 3153Soru →

A enterprise network administrator is upgrading an organization's wireless infrastructure and analyzing legacy and modern IEEE 802.11 wireless standards. Match each IEEE 802.11 wireless standard to its distinguishing technical characteristics and operating features.

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Öğeler

802.11a
802.11n (Wi-Fi 4)
802.11ac Wave 2 (Wi-Fi 5)
802.11ax (Wi-Fi 6)

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

802.11a matches the 5 GHz OFDM 54 Mbps description; 802.11n (Wi-Fi 4) matches dual-band operation with MIMO; 802.11ac Wave 2 (Wi-Fi 5) matches 5 GHz primary operation with Downlink MU-MIMO and 160 MHz channels; 802.11ax (Wi-Fi 6) matches OFDMA, bi-directional MU-MIMO, TWT, and multi-band support up to 6 GHz.
Each IEEE 802.11 standard introduces distinct physical layer specifications: 802.11a introduced 54 Mbps in the 5 GHz band using OFDM; 802.11n brought MIMO and dual-band operation; 802.11ac Wave 2 added Downlink MU-MIMO and 160 MHz channel widths exclusive to 5 GHz; and 802.11ax introduced OFDMA, Target Wake Time, and 6 GHz spectrum access.

Adım Adım Çözüm

1
Identify frequency bands and modulation for legacy standards
802.11a operates exclusively on 5 GHz using OFDM up to 54 Mbps.
802.11a was designed for 5 GHz and uses OFDM, distinguishing it from 802.11b (2.4 GHz DSSS).
2
Identify features introduced in 802.11n (Wi-Fi 4)
802.11n supports both 2.4 GHz and 5 GHz and introduced MIMO technology.
Wi-Fi 4 was the first standard to utilize multiple antennas (MIMO) and dual-band capability.
3
Differentiate 802.11ac Wave 2 features from 802.11ax
802.11ac Wave 2 operates on 5 GHz and introduced Downlink MU-MIMO with up to 160 MHz channel bonding.
Wi-Fi 5 is 5 GHz-only for data frames, while Wave 2 added Downlink MU-MIMO.
4
Analyze high-efficiency features of 802.11ax (Wi-Fi 6)
802.11ax introduces OFDMA, Uplink/Downlink MU-MIMO, Target Wake Time, and operates in 2.4 GHz, 5 GHz, and 6 GHz (Wi-Fi 6E).
OFDMA and TWT are core innovations of 802.11ax designed to handle high client density and improve battery life.

Anahtar Kavram

Wireless 802.11 Standards, Frequency Bands, and Technological Capabilities
Tahmini Süre:2m 0s
Soru 3154Soru →

A system administrator is configuring network firewall rules for a web server host that must accept both standard unencrypted web browsing traffic and secure encrypted web browsing traffic. Which of the following port numbers must be permitted through the firewall to allow this functionality? (Select TWO.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Port 80; Port 443

Cevap

Port 80 (HTTP) and Port 443 (HTTPS) must be allowed through the firewall.
Port 80 is the standard port designated for HTTP (unencrypted web traffic), and Port 443 is the standard port for HTTPS (secure, encrypted web traffic). Allowing both ports enables web clients to connect over standard HTTP as well as secure HTTPS.

Adım Adım Çözüm

1
Identify the protocol used for standard unencrypted web traffic.
Unencrypted web traffic utilizes HTTP on TCP port 80.
HTTP is the standard protocol for serving unencrypted web content.
2
Identify the protocol used for secure encrypted web traffic.
Encrypted web traffic utilizes HTTPS on TCP port 443.
HTTPS encrypts web traffic over TLS/SSL on port 443.

Anahtar Kavram

Standard Web Service Ports (HTTP 80 and HTTPS 443)
Soru 3155Soru →

Match each mobile connectivity term on the left with its correct functional description on the right.

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Öğeler

IMEI
IMSI
VPN
Tethering

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

IMEI matches the unique 15-digit hardware number assigned to identify a physical mobile device. IMSI matches the unique number stored on the SIM card identifying the network subscriber. VPN matches the encrypted connection securing mobile traffic across public Wi-Fi. Tethering matches the feature allowing a smartphone to share its cellular internet connection with nearby devices.
IMEI represents the physical device's global hardware identifier. IMSI represents the subscriber user identity associated with the SIM card. VPN establishes an encrypted communication pathway across untrusted wireless networks. Tethering provides internet access to nearby devices using the smartphone's cellular data connection.

Adım Adım Çözüm

1
Distinguish between device hardware identification and subscriber account identification.
Identify IMEI as the hardware serial code and IMSI as the SIM subscriber code.
IMEI identifies the physical mobile handset while IMSI identifies the individual user account attached to the SIM.
2
Identify network security mechanisms for untrusted wireless connections.
Match VPN to encrypted tunnel connections over public Wi-Fi networks.
VPN technology protects mobile data confidentiality by encrypting traffic between the device and corporate/private networks.
3
Define connection sharing capabilities on mobile operating systems.
Match Tethering to sharing a mobile internet connection with adjacent client devices.
Tethering/hotspot allows client devices to route their internet traffic through the phone's active cellular data connection.

Anahtar Kavram

Mobile Device Wireless and Network Identifiers and Services
Soru 3156Soru →

A mobile technician is setting up local data synchronization between a tablet and a desktop computer for an executive who frequently works in offline environments. The technician connects the tablet to a USB-C port on the desktop using the charging cable included with the tablet to transfer large media presentations. Although the desktop computer's USB-C port is rated for USB 3.2 Gen 2 speeds (10 Gbps), the file synchronization transfer rate remains capped at 480 Mbps. Which of the following is the most likely cause of this synchronization speed limitation?

Cevabı ve açıklamayı göster

Cevap: The connected USB-C charging cable only supports USB 2.0 data transfer specifications.

Cevap

The connected USB-C charging cable only supports USB 2.0 data transfer specifications.
While USB Type-C specifies the physical connector shape, it does not guarantee high-speed data transfer capabilities across all cables. Many bundled mobile charging cables include wires connected only for USB 2.0 data pins (480 Mbps max) alongside power delivery lines. To achieve USB 3.2 transfer speeds, both the host port, client device, and connecting cable must support the higher USB specification.

Adım Adım Çözüm

1
Analyze the reported symptom and transfer speed bottleneck.
The file transfer speed between the tablet and PC is capped at 480 Mbps despite the host port supporting USB 3.2 Gen 2 (10 Gbps).
480 Mbps is the maximum theoretical transfer speed for the USB 2.0 standard.
2
Evaluate physical layer hardware components involved in the local synchronization.
The technician used a standard charging cable bundled with the tablet.
Manufacturers frequently bundle cables that support high wattage charging but only carry USB 2.0 data lines to reduce costs.
3
Identify the proper resolution for high-speed local device synchronization.
Replace the charging cable with a certified high-speed USB-C data synchronization cable.
A rated USB 3.2 Gen 2 cable will allow the connection to negotiate at the full speed supported by the host and client controllers.

Anahtar Kavram

Mobile device physical synchronization standards and cable capabilities
Soru 3157Soru →

A network technician is auditing legacy and modern cabling infrastructure in an enterprise deployment. Match each cable or connector type on the left with its correct physical characteristic or performance specification on the right.

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Öğeler

RG-6 Coaxial Cable
Cat 6a UTP Cable
Single-Mode Fiber Cable
eSATA Cable

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

RG-6 Coaxial Cable matches 75-ohm broadband/F-type connectors; Cat 6a UTP Cable matches 10 Gbps at 500 MHz up to 100m; Single-Mode Fiber Cable matches narrow core laser transmission up to 40 km; eSATA Cable matches 6 Gbps external drive connectivity limited to 2 meters.
Each cable type aligns precisely with its engineering specification: RG-6 operates at 75-ohm impedance with F-type connectors; Cat 6a provides 10 Gbps bandwidth at 500 MHz up to 100m; Single-Mode Fiber uses lasers across a 9-micron core for distances up to 40 km; eSATA offers 6 Gbps external storage connections with a 2-meter maximum length.

Adım Adım Çözüm

1
Identify the RF broadband media characteristics.
Connect RG-6 coaxial cable to 75-ohm impedance, F-type threaded connectors, and cable modem applications.
RG-6 is engineered specifically with 75-ohm characteristic impedance and thick shielding for cable internet and TV signals.
2
Evaluate high-speed Ethernet copper cabling standards.
Associate Category 6a (Cat 6a) with 500 MHz frequency rating and 10 Gbps throughput over 100 meters.
Standard Cat 6 is limited to 37–55 meters for 10 Gbps, whereas Cat 6a reduces crosstalk to maintain 10 Gbps over the full 100m distance.
3
Analyze optical fiber transmission modes.
Associate Single-Mode Fiber (SMF) with a narrow glass core (~9 μm), laser illumination, and long-range limits (up to 40 km).
Multi-mode fiber uses LED light sources and larger cores (~50–62.5 μm) for shorter distances, while single-mode uses focused lasers for long-haul WAN links.
4
Determine external peripheral storage bus limits.
Match eSATA with 6 Gbps raw transfer speed and a strict 2-meter physical distance limit.
eSATA maintains native SATA controller speeds to external drives without conversion overhead, but strict signal attenuation caps its maximum cable length at 2 meters.

Anahtar Kavram

Network and Peripheral Cable Specifications, Distances, and Connector Standards
Tahmini Süre:1m 30s
Soru 3158Soru →

A technician is explaining mobile device networking options to a end user. Match each mobile connectivity feature on the left with its corresponding technical function on the right.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

Airplane Mode
Mobile Hotspot
Bluetooth Pairing
Wi-Fi Calling

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

Airplane Mode disables all wireless transceivers; Mobile Hotspot shares cellular internet over Wi-Fi; Bluetooth Pairing links short-range devices via authentication; Wi-Fi Calling routes calls over an 802.11 network.
Each feature directly aligns with its core functionality: Airplane Mode turns off all wireless radios; Mobile Hotspot shares a cellular internet connection via Wi-Fi; Bluetooth Pairing secures a short-range Personal Area Network; and Wi-Fi Calling carries carrier voice traffic over an 802.11 Wi-Fi connection.

Adım Adım Çözüm

1
Identify the function of Airplane Mode.
It toggles off all radio transceivers including cellular, Wi-Fi, and Bluetooth.
Airplane mode is designed to quickly disable all RF signals.
2
Identify the function of Mobile Hotspot.
It broadcasts a local Wi-Fi network that routes client traffic over the device's cellular data plan.
Hotspot enables internet sharing with external devices such as laptops or tablets.
3
Identify the function of Bluetooth Pairing.
It exchanges authentication keys to connect two devices into a Personal Area Network (PAN).
Pairing enables wireless peripheral connectivity like headsets or keyboards.
4
Identify the function of Wi-Fi Calling.
It transmits carrier voice packets over a local 802.11 wireless network.
Wi-Fi calling bridges phone service using IP networking when cell towers are unreachable.

Anahtar Kavram

Mobile Device Wireless and Network Connectivity Features
Soru 3159Soru →

A field technician is setting up a ruggedized mobile smartphone for an inspector who needs to attach a USB flash drive directly to the device to offload data files without connecting to a computer. When the flash drive is attached using a standard adapter, the smartphone does not recognize the storage drive. Which feature must the smartphone's hardware and operating system support to allow it to function as a host device for external USB accessories?

Cevabı ve açıklamayı göster

Cevap: USB On-The-Go (USB OTG)

Cevap

USB On-The-Go (USB OTG) is the feature that allows mobile devices to act as hosts for external USB devices.
USB On-The-Go (USB OTG) is an extension of the USB standard that allows mobile devices to alternate between client and host roles. When USB OTG is supported, the mobile device can power attached peripherals such as flash drives and read/write data directly.

Adım Adım Çözüm

1
Identify the mobile device role requirement
The smartphone must act as a USB host controller rather than a passive USB client device.
Standard mobile devices act as client devices when connected to PCs; to host peripherals like flash drives, role switching is required.
2
Evaluate the connectivity standard that enables USB host functionality on mobile ports
USB On-The-Go (USB OTG) allows mobile ports (Micro-USB or USB-C) to negotiate host status.
USB OTG specifies signal lines and protocol extensions that enable a mobile device to power and interface directly with peripherals.

Anahtar Kavram

USB On-The-Go (USB OTG) Host Capabilities on Mobile Devices
Tahmini Süre:1m 0s
Soru 3160Soru →

An IT technician is performing maintenance on an enterprise laptop equipped with an OLED display panel. The user reports that the screen remains dark upon booting, though external monitors function normally. The technician orders a replacement high-voltage inverter board to restore screen illumination. Which of the following best explains why this replacement part will fail to resolve the issue?

Cevabı ve açıklamayı göster

Cevap: OLED display technology relies on organic light-emitting diodes that produce their own light without requiring a separate backlight or high-voltage inverter board.

Cevap

OLED display technology relies on organic light-emitting diodes that produce their own light without requiring a separate backlight or high-voltage inverter board.
OLED displays consist of individual organic light-emitting diodes that generate their own light when energized. Because OLED panels are self-emissive and do not feature a traditional backlight assembly, they do not require high-voltage inverter boards (which were used for legacy CCFL LCD screens).

Adım Adım Çözüm

1
Identify the specific display technology used by the laptop in the scenario.
The laptop utilizes an OLED (Organic Light-Emitting Diode) display panel.
Understanding the panel type determines the hardware required for screen illumination.
2
Analyze the role and function of a high-voltage inverter board.
Inverter boards supply AC power to Cold Cathode Fluorescent Lamp (CCFL) backlights, which were used in older LCD displays.
Modern displays use either LED backlighting (low DC voltage) or OLED self-emissive technology.
3
Evaluate why an inverter board cannot be used on an OLED panel.
Each pixel in an OLED display emits its own light, so there is no backlight assembly or inverter board present in the laptop architecture.
Ordering an inverter board for an OLED laptop is an incompatible repair approach because the component does not exist in the system.

Anahtar Kavram

OLED laptop displays are self-emissive and do not utilize backlight inverters or separate light strips.
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