Tüm alıştırma soruları

A network administrator is troubleshooting a scenario where IP phones connected to an access switch are unable to obtain IP addresses or reach the gateway on VLAN 50. Meanwhile, workstations on VLAN 10 connected to the same switch are functioning normally across the 802.1Q trunk link to the core switch. Reviewing the access switch configuration reveals that VLAN 50 traffic is being dropped at the trunk port, and VLAN 50 does not appear in the switch's local VLAN database. Which TWO actions must the administrator perform on the access switch to restore network connectivity for the IP phones? (Select TWO)

Users on a corporate network segment suddenly report an inability to access internal intranet resources and the internet. A technician checks an affected client workstation and runs the `ipconfig /all` command, obtaining the following network output:

IPv4 Address. . . . . . . . . . . : 192.168.1.105(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1

The corporate network standard uses the $10.45.0.0/16$ address space, and authorized enterprise DHCP servers reside at $10.45.1.10$ and $10.45.1.11$. Which of the following is the most likely root cause of this connectivity failure?

A network administrator is deploying a secondary authoritative DNS server to provide redundancy for the domain `corp.example.com`. While standard client queries resolve properly across the internal network, full zone transfers between the primary server (`10.0.1.50`) and the secondary server (`10.0.2.50`) consistently fail. Executing `dig @10.0.1.50 corp.example.com AXFR` from the secondary server results in the following output:

text
;; Connection to 10.0.1.50#53(10.0.1.50) for corp.example.com failed: connection refused.

Standard single-record DNS queries using UDP port 53 succeed without issue. Which firewall modification will resolve the zone transfer failure?

A network technician is deploying three wireless access points across a single-floor office space to provide coverage on the 2.4 GHz frequency band. To minimize co-channel interference and avoid adjacent-channel overlap while maintaining stable connectivity, which of the following deployment configurations should the technician implement? (Select TWO.)

A network operations team is establishing a disaster recovery restoration procedure for a core authentication server. The server undergoes a scheduled full backup every Sunday at 01:00. To balance storage utilization and recovery speed, the team configures daily differential backups Monday through Saturday at 23:00. On Friday at 14:00, a primary storage array failure causes complete data loss on the server. Which sequence of backup sets must the network administrator restore to bring the system to its most recent available state using the fewest restoration steps?

A network technician is provisioning a new telemetry server at a branch office. The server is assigned the IPv4 address $192.168.48.150/25$. Local testing shows that the server cannot reach external network services or ping its configured gateway. A review of the network configuration details reveals:

- Server IP Address: $192.168.48.150$
- Subnet Mask: $255.255.255.128$ ($/25$)
- Default Gateway: $192.168.48.1$
- Router Interface IP: $192.168.48.1/25$

Which of the following identifies the root cause of the connectivity failure?

A network administrator is configuring a 2.4 GHz wireless network deployment for a single-floor medical clinic featuring four access points arranged in a square grid formation. To minimize interference between adjacent wireless cells, which channel assignment strategy should the administrator implement?

A network operations team is establishing standard operational procedures and documentation guidelines for an enterprise network. Match each documentation artifact to the operational scenario where it serves as the primary tool for analysis or execution.

Match each IPv6 address or prefix to its corresponding deployment scope and functional classification.

A network administrator is designing a subnetwork scheme for a branch facility assigned the IPv4 block $192.168.16.0/22$. The design requirement specifies creating subnets that can each support a minimum of $50$ usable host IP addresses for individual department segments while maximizing the total number of subnets created. Which CIDR prefix length meets these requirements, and what is the exact number of usable host IP addresses provided per subnet?

A network technician receives a report that hosts on VLAN 10 attached to Switch-1 are unexpectedly receiving untagged traffic from VLAN 20 attached to Switch-2 across a point-to-point trunk link. Console logs on Switch-1 frequently display `%CDP-4-NATIVE_VLAN_MISMATCH` notifications for interface GigabitEthernet 0/1. Which of the following is the root cause of this behavior?

A network administrator is reviewing switch console logs and port statistics following an intermittent layer 2 outage. Match each observed diagnostic log or symptom on the left to its underlying root cause on the right.

An engineer adds a new access switch to an established enterprise network. Shortly after connecting the switch to the core layer, traffic across multiple VLANs experiences severe latency and suboptimal path routing. Investigation reveals that the new access switch has unexpectedly taken over as the Spanning Tree Protocol (STP) root bridge for all VLANs. Which configuration error on the new access switch is the primary cause of this network issue?

Match each physical or protocol network troubleshooting scenario to the most appropriate diagnostic tool or analyzer function.

A network administrator is troubleshooting persistent link degradation and high CRC error counts on a 75-meter Category 6 UTP run connecting an industrial factory floor workstation to an IDF switch. A basic continuity wire mapper indicates that all eight conductors are mapped correctly according to TIA/EIA 568B pinouts at both ends. Which of the following diagnostic steps or corrective actions should the technician take to isolate and resolve the physical layer failure? (Select TWO.)

A network technician is troubleshooting a client workstation that is generating an APIPA address ($169.254.x.x$) on a newly created VLAN. Which sequence of diagnostic steps represents the correct order to isolate and resolve this DHCP relay issue?

A system administrator is troubleshooting a database connection failure from a newly deployed application host (`10.150.12.45/24`) to an enterprise database server (`172.28.100.50`). The application requires TCP port 5432 (PostgreSQL). The administrator executes diagnostic commands on the host and the intermediary router:

Host CLI Output (`ip route` & `ip addr`):
text eth0: inet 10.150.12.45/24 brd 10.150.12.255 scope global eth0 default via 10.150.13.1 dev eth0

Router ACL Output (`show ip access-lists OUTBOUND_DB`):
text Extended IP access list OUTBOUND_DB 10 permit tcp 10.150.12.0 0.0.0.255 host 172.28.100.50 eq 3306 20 deny ip any any

Based on the diagnostic output, which TWO factors are directly preventing the application host from communicating with the database server?

Match each IEEE 802.11 wireless standard on the left with its defining operational frequency and technological capability on the right.

Following a total power loss and system shutdown across an enterprise primary data center, a network engineer is executing the disaster recovery plan to restore network operations safely and prevent authentication failures or dependency loops. Place the following restoration steps into the correct sequence from first to last.

A workstation on an enterprise network needs to resolve the fully qualified domain name `app.partner-net.com` for the first time, starting with an empty local DNS cache. Place the steps of the standard DNS resolution process in the correct chronological order, from the initial client request to the final IP address response.