Tüm alıştırma soruları

A network administrator connects a single-mode fiber optic patch cable to a newly installed patch panel module. Although physical link connectivity is established, optical testing shows exceptionally high optical return loss (back reflection), degrading signal quality. Upon visual inspection of the patch panel ports and connectors, the administrator notes that the patch cable has green LC connectors while the patch panel bulkhead coupler accepts blue LC connectors. Which of the following physical layer mismatched connection types is causing this issue?

A network technician is investigating degraded performance and intermittent packet drops on a newly terminated Category 6 UTP cable run. When tested with a basic wiremap continuity tester, all eight pins pass with direct 1-to-1 pin mapping. However, the link experiences severe performance issues under load. Which of the following test results or physical characteristics indicate that a split pair condition is the root cause of this failure? (Select TWO.)

A network administrator is troubleshooting a connectivity failure between two switches connected via an 802.1Q trunk link. Host devices assigned to VLAN 10 on Switch-A are unable to communicate with servers on VLAN 10 connected to Switch-B. Inspection of the switch port configurations indicates that port GigabitEthernet 0/1 on Switch-A is configured with VLAN 10 as its native VLAN, while port GigabitEthernet 0/1 on Switch-B uses default VLAN 1 as its native VLAN. Which of the following best explains why VLAN 10 traffic fails to reach its destination across the trunk?

Match each command-line network troubleshooting command to its primary diagnostic function.

A network engineering team is updating the disaster recovery policy for a critical real-time payment processing application. The Business Impact Analysis (BIA) establishes a Recovery Point Objective (RPO) of less than 5 minutes and a Recovery Time Objective (RTO) of less than 15 minutes. Which TWO of the following technical solutions should the team implement to meet both requirements?

A workstation on VLAN 30 ($192.168.30.0/24$) fails to receive an IP address automatically and shows an APIPA address of $169.254.14.88$. A network administrator must systematically isolate the issue from the local host to the centralized network services. Place the troubleshooting steps in the correct logical sequence.

An enterprise network operations team must select a secondary recovery facility for an internal administrative application. The Business Impact Analysis (BIA) establishes a Recovery Time Objective (RTO) of 24 hours and mandates strict budget controls. The disaster recovery strategy requires the facility to have active power, environmental controls, and telecommunications infrastructure in place, along with pre-racked server hardware, but continuous live data replication is not funded. Which disaster recovery site classification best meets these organizational requirements?

A network administrator receives reports that mobile devices connecting to the guest Wi-Fi network (VLAN 85, subnet $172.20.85.0/24$) are failing to access internet resources. Inspecting a network details page on an affected device reveals an IP address of $169.254.41.19$ with a subnet mask of $255.255.0.0$. Reviewing the DHCP server statistics shows that the active pool for VLAN 85 currently has $0$ available IP addresses remaining out of the $254$ allocated pool entries. Which of the following actions should the administrator take to resolve the root cause of this issue?

A network administrator is investigating a database connection issue on a host machine. The administrator needs to query the designated internal DNS server at $10.0.0.53$ directly for the record `db1.corp.internal` rather than relying on local resolver cache settings, and also inspect all active TCP socket connections along with listening ports on the local system. Which of the following command-line entries will successfully achieve these goals? (Select TWO)

During a fiber optic cabling deployment between two network racks, a technician notes high optical signal attenuation on a multi-mode fiber patch cord. The technician suspects a physical micro-fracture or excessive bend radius near one of the connector terminations where light is escaping through the buffer. Which tool should the technician use to visually locate the exact spot where light is leaking?

A network administrator is configuring the backup schedule for an enterprise monitoring server. Storage space at the off-site repository is limited, but the primary requirement is to minimize the Recovery Time Objective (RTO) during a total disaster recovery event. The full backup is performed every Sunday evening. Which daily backup strategy should the administrator implement to achieve the shortest recovery time while meeting storage constraints?

A network technician executes a command-line DNS query on a workstation to troubleshoot host resolution. The technician receives the following terminal output:

text
Server: resolver.lab.corp
Address: 192.168.1.254

Non-authoritative answer:
Name: fileserver.lab.corp
Address: 10.1.50.12

Which of the following statements correctly interprets the 'Non-authoritative answer' header in this CLI output?

An enterprise telemetry cluster suffers a database volume corruption on Friday at 10:00 AM. The disaster recovery strategy specifies a full system backup executed every Sunday at midnight, supplemented by daily differential backups executed every night at 23:00 from Monday through Thursday. Which TWO of the following recovery steps must be performed to restore the database to its latest possible state prior to the failure while minimizing operational restore steps? (Select TWO.)

A network technician is systematically troubleshooting a workstation that is unable to access an internal web portal (`app1.corp.internal`). Order the command-line network utilities in the correct logical sequence to isolate this issue, following a bottom-up methodology from local host configuration to remote transport port verification.

An organization executes a full system backup every Sunday at midnight. From Monday through Saturday, differential backups are executed daily at midnight. On Wednesday afternoon, a core router's storage drive fails, requiring a bare-metal recovery. Which of the following restoration sequences must the network administrator execute to restore the router configuration to its latest backed-up state?

Following an unrecoverable hardware failure at a primary data center, a network engineering team must execute a failover to a secondary warm disaster recovery site. Place the following disaster recovery procedure steps in the correct chronological order from first to last.

A network administrator is configuring network firewall policies and establishing service baselines. Match each protocol on the left with its default port number, transport layer protocol, and primary operational function on the right.

A network engineer is configuring an interface on a core router with the IP address $10.88.140.165/26$. What is the broadcast address for this IPv4 subnet?

During a security audit, a network analyst identifies unencrypted directory query traffic originating from an internal application server to a domain controller over TCP port 389. To secure these identity lookup requests with TLS encryption, which protocol and default port combination must be permitted through the internal firewall?

A network administrator is provisioning network core services across multiple VLANs in a enterprise campus network. Centralized infrastructure services, including DHCP and DNS, reside on VLAN 10 ($10.10.10.0/24$), whereas user client workstations reside on VLAN 20 ($10.10.20.0/24$) and VLAN 30 ($10.10.30.0/24$). Which TWO of the following configuration steps must be implemented to ensure client hosts on remote VLANs can automatically acquire network configuration settings and properly resolve internal hostnames to dual-stack IPv6 resources? (Select TWO)