Network Operations

During an unpredicted core link failure, a lead network engineer executed an approved Emergency Change (ECAB) by manually applying temporary static routing overrides directly on live edge routers to restore connectivity. Three hours later, an automated configuration management pipeline executed its scheduled compliance audit and synchronized the routers against the central version-controlled repository, inadvertently wiping out the manual emergency modifications and restoring the outage. Which of the following procedures should have been completed immediately following the emergency implementation to permanently prevent this configuration drift?

Match each high-availability concept or protocol on the left with its correct operational description on the right.

A network technician needs to configure a network management system to monitor router performance metrics using SNMP. To meet security compliance standards, the communication must ensure both message authentication and payload encryption. Which SNMP version and security level should be selected?

Match each high-availability technology or protocol on the left with its primary operational characteristic on the right.

During a routine compliance audit, a network analyst discovers that several perimeter firewalls contain unapproved Access Control List (ACL) rule modifications. Investigation reveals that an on-call administrator applied these inline changes two weeks ago to mitigate an active service disruption, but bypassed standard approval procedures. The temporary fix stabilized traffic but resulted in configuration drift between the active firewall state and the documented network baseline. To resolve this non-compliant state while adhering to formal change management governance, which action should the analyst take first?

A network operations team is upgrading its centralized monitoring and logging architecture to ensure regulatory compliance and robust forensic capabilities. Match each network logging or telemetry mechanism on the left with its primary operational auditing function on the right.

An enterprise network storage system suffered a catastrophic volume failure on Thursday at 14:15. The network administrator maintains a disaster recovery plan with the following backup schedule:

- Full Backup: Executed every Sunday at 00:00
- Differential Backup: Executed daily Monday through Wednesday at 23:00
- Incremental Backup: Executed hourly on Thursday between 01:00 and 14:00
- Transaction Log Backup: Executed every 15 minutes

To restore the system to the point of failure in the shortest total downtime while maintaining complete data integrity, in what order should the network administrator execute the restoration steps?

A network technician is preparing to integrate several new access switches into an existing enterprise network. Before making any configuration changes, the technician records the current operating system versions, interface settings, and active services across all network devices. Which of the following terms best describes this documented initial snapshot used to detect unauthorized modifications over time?

A senior network infrastructure engineer is planning a major architectural revision to implement micro-segmentation policies across an enterprise data center core network. To maintain service availability and comply with IT service management best practices, the engineering team must follow a structured configuration and change management lifecycle. In what chronological order should the engineer execute the change management phases from first to last?

A senior network operations engineer is implementing a centralized telemetry and performance monitoring solution for core routers transmitting sensitive enterprise data across a shared infrastructure. The monitoring design requires real-time interface throughput polling and immediate alert notifications whenever link utilization breaches critical thresholds. Additionally, security compliance mandates that all monitoring data, including administrative credentials and metric payloads, must provide both message integrity verification and cryptographic privacy during transmission over untrusted network segments. Which of the following protocol configurations correctly satisfies all performance monitoring and security compliance requirements?

A network security administrator must apply a critical security patch to an enterprise perimeter firewall cluster to remediate a disclosed remote code execution vulnerability. Place the following patch management lifecycle steps in the correct chronological order from first step to last step.

An enterprise network operations team is analyzing complex performance anomalies and telemetry configurations across a hybrid WAN deployment. Match each observed network symptom or monitoring configuration requirement on the left with the correct network performance monitoring metric or protocol mechanism on the right.

During a routine audit, a network engineer notices that multiple access-layer switches are running an outdated operating system version vulnerable to memory leaks under high traffic load. Before initiating the upgrade across the entire enterprise network during a scheduled window, which procedure should the engineer perform first to prevent unforeseen outages?

A network administrator needs to configure centralized log forwarding from edge switches to a SIEM collector across an untrusted WAN connection. Corporate compliance mandates that log transmission must guarantee delivery confirmation to prevent log loss during congestion and secure event details against eavesdropping in transit. Which configuration best satisfies both requirements?

A network administrator configures a redundant gateway topology using a First Hop Redundancy Protocol (FHRP) to provide high availability for a corporate subnet. During a scheduled failover test, the primary router is powered off. Although logs confirm that the standby router successfully transitioned to the active role, all client workstations immediately lose outbound internet connectivity. Troubleshooting reveals that workstation traffic continues to be routed toward the MAC and IP addresses of the powered-off primary router interface. Which of the following configuration errors is the most likely cause of this issue?

An auditor notes that an organization's network monitoring traffic is transmitted without encryption and that critical log messages are lost during periods of high link utilization. The network administrator must reconfigure telemetry protocols on core switches to ensure reliable log transport, cryptographic confidentiality, and authenticated management querying. Which of the following implementations address the auditor's security and reliability findings? (Select TWO.)

Match each high-availability technology or operational mechanism on the left with its primary redundancy behavior on the right.

A network administrator is executing a planned change during a maintenance window to implement new quality of service (QoS) dynamic bandwidth allocation rules on a primary distribution switch pair. Ten minutes into the post-implementation validation phase, automated network monitoring system alerts indicate that real-time telemetry traffic has breached defined latency and packet loss thresholds, failing the pre-established change success metrics. Which of the following is the most appropriate action for the administrator to take next?

A network technician is drafting a standard Request for Change (RFC) proposal to modify configuration parameters on a company's primary router. Which of the following key components must be included in the RFC document prior to submitting it for approval? (Select TWO.)

A network administrator is deploying a performance monitoring solution to track switch CPU and memory utilization across a enterprise network. The solution must support encrypted management traffic and allow standard polling queries to pass through internal firewalls. Which of the following configurations and protocols should the administrator implement? (Select TWO)