Tüm alıştırma soruları

A network technician is configuring a newly deployed server in a corporate data center. The server is assigned the IPv4 address $10.100.15.70$ with a subnet mask of $255.255.255.192$ (/26) and a default gateway of $10.100.15.1$. During testing, the server can communicate with local hosts in the $10.100.15.64/26$ IP range, but it cannot access devices on remote subnets or reach the default gateway. Which of the following best explains why the server cannot reach its default gateway?

A network technician receives complaints regarding intermittent disconnections and low throughput on wireless medical carts within a clinic's newly renovated wing. A signal survey reveals that when moving from the hallway into exam rooms separated by lead-lined drywall shielding, the Received Signal Strength Indicator (RSSI) drops significantly from $-60\text{ dBm}$ to $-86\text{ dBm}$. Which wireless signal issue is the primary cause of this performance degradation?

Match each physical network cabling fault or diagnostic scenario on the left with the most appropriate diagnostic tool or corrective action on the right.

A network technician configures an extended Access Control List (ACL) on a stateless router interface to allow workstations on subnet $10.40.10.0/24$ to access an external web application at $203.0.113.80$ over HTTPS (TCP port 443). The technician adds the following outbound rule on the internal interface:

`permit tcp 10.40.10.0 0.0.0.255 host 203.0.113.80 eq 443`

After applying this configuration, client computers cannot successfully connect to the web application. Network captures reveal that outbound TCP SYN packets leave the router, but return traffic is never delivered to the clients. Which of the following ACL modifications will resolve this connectivity issue?

Match each network performance metric or monitoring mechanism on the left with its corresponding operational description or primary diagnostic use case on the right.

A network engineer is troubleshooting an issue where a host server ($10.20.10.45/24$) cannot reach a database server ($172.16.80.12/24$) across a multi-router topology containing active Access Control Lists (ACLs). Following the standard CompTIA network troubleshooting methodology, in what sequence should the engineer execute the following diagnostic and remediation steps?

A network technician is investigating reports that several workstations on a corporate subnet ($10.250.12.0/24$) are intermittently assigned IP addresses in an unrecognized pool ($172.16.99.0/24$), causing them to lose connection to internal network resources. Place the following troubleshooting and remediation steps in the correct chronological order from the initial diagnostic step to final verification.

A network technician is troubleshooting an issue where a client workstation ($10.1.10.5/24$) cannot access a web application hosted on a remote server ($172.16.20.50/24$). Place the following diagnostic and remediation steps in the correct chronological order, adhering to standard CompTIA troubleshooting methodology from initial local verification through resolution.

A network administrator is deploying a wireless network for a corporate headquarters. Organization policy requires that every employee authenticate using their individual enterprise user credentials against a central authentication server, preventing the operational overhead and security risk of static pre-shared keys. Which wireless security standard and authentication mechanism should the administrator implement to fulfill these security requirements?

A network administrator needs to establish out-of-band management access to the text-based command-line interfaces of several managed switches in a remote datacenter rack. The switches lost all primary in-band IP connectivity following a local network configuration error, but their RS-232 serial console ports remain operational. Which device should be deployed in the rack to aggregate these serial connections and provide remote console access over the network?

A network technician is installing a new VoIP phone at a user's desk. The technician must trace an unlabeled UTP cable run from the office wall jack back to its corresponding port on the patch panel in the equipment closet. Once identified, the technician must also confirm that the switch port is actively supplying electrical power over the ethernet wiring to power the phone. Which TWO of the following tools should the technician use to accomplish these tasks? (Select TWO.)

A network security analyst observes anomalous traffic on an internal enterprise subnet. When an end user accidentally mistypes an internal file server hostname, packet logs show an unauthorized host on the local broadcast domain immediately responding to the link-local multicast request before the DNS query completes, prompting the user's workstation to attempt authentication. Which of the following attack vectors is occurring?

A network engineer is conducting diagnostic procedures across an enterprise network suffering from physical and application-layer anomalies. Match each specific physical or protocol troubleshooting scenario to the most appropriate hardware testing tool or packet analyzer capability.

A network technician is troubleshooting an enterprise building interconnect where a newly provisioned multi-mode fiber link experiences high frame loss, while workstation clients on the attached Ethernet segment fail to receive automatic IP configurations. Which of the following diagnostic tools or analyzer filters should the technician utilize to isolate these physical and application layer issues? (Select TWO.)

A network administrator is investigating high frame error rates and severe throughput degradation on a newly commissioned Category 6 UTP cable run connecting a desktop computer to an enterprise switch. A basic continuity cable tester confirms that all eight conductors are connected pin-for-pin ($1 \rightarrow 1$, $2 \rightarrow 2$, etc.) on both ends without any opens or shorts. However, when high-bandwidth data transmission occurs, extreme Near-End Crosstalk (NEXT) occurs. Which wiring fault is present, and which diagnostic capability is required to detect it?

A network technician is investigating an issue where wireless VoIP handsets drop calls when roaming between access points in a newly constructed distribution center. The technician established a theory that 802.11r fast transition roaming was omitted from the new access point WLAN profile, tested this theory in a staging environment, and confirmed the cause. According to the CompTIA troubleshooting methodology, which of the following tasks should the technician perform NEXT? (Select TWO).

A network technician is troubleshooting an intermittent network connection on a 75-meter Category 6 horizontal copper cable run servicing an enterprise workstation. A basic wiremapper confirms that all eight conductors show proper pin-to-pin continuity and standard T568B alignment with no open or short circuits. However, when high-bandwidth file transfers occur, the switch port interface logs a rapidly increasing counter of Cyclic Redundancy Check (CRC) errors and late collisions. Which of the following diagnostic tools should the technician use to pinpoint the precise location and cause of signal degradation along the hidden cable run?

A network administrator is securing a newly deployed Layer 3 access switch prior to production deployment. The security policy mandates encrypted remote monitoring, protection against unauthorized network infrastructure footprinting, and secure management protocol usage. Which of the following hardening configurations should the administrator apply to meet these security requirements? (Select TWO.)

Match each command-line troubleshooting utility syntax with its precise diagnostic objective during complex network failure isolation.

Match each remote access technology or management tool on the left with the operational scenario on the right for which it serves as the most appropriate solution.