Operational Monitoring and Maintenance

Refer to the exhibit. Which interface has a physical layer connectivity problem?

A network operator needs to upgrade the Junos OS on the backup RE (re1) of a dual-RE system. Which procedure ensures that only the backup RE is upgraded and rebooted without affecting the forwarding plane?

A network administrator is troubleshooting high latency on a link. Which command provides real-time interface statistics?

A network administrator wants to see the current CPU load average over the last 1, 5, and 15 minutes on a Juniper device. Which command displays this information?

A network engineer notices that a device is not sending SNMP traps to the NMS. Which operational command should be used to verify SNMP configuration?

A Juniper device is running out of disk space on the /var partition. Which command can be used to check disk usage?

Refer to the exhibit. Based on the log output, what is the most likely issue with interface ge-0/0/1?

An administrator observes that the router's CPU utilization is consistently high. Which command helps identify which process is consuming the most CPU?

An engineer needs to check the current system uptime on a Juniper device running Junos OS. Which command should they use?

An administrator wants to verify that BGP neighbors are established. Which command provides a summary of all BGP peer sessions?

After a configuration change, a router is not behaving as expected. The administrator wants to rollback to the previous configuration. Which command accomplishes this?

You are managing a Juniper MX240 router at a small ISP. The router has been operating normally for months. This morning, a customer reports intermittent packet loss on their connection, which is served by interface ge-0/0/2. You SSH into the router and run 'show interfaces ge-0/0/2 extensive'. The output shows input errors increasing rapidly, including CRC errors and frame errors. The interface is up/up. You also notice that the interface statistics show a high number of carrier transitions. The cable connecting the router to the customer's CPE was recently replaced by the customer's technician. What is the most likely cause of the errors and the correct action to resolve the issue?

To monitor interface traffic in real-time, which operational command is most appropriate?

A network administrator is troubleshooting a routing issue and wants to view the routing table for a specific routing instance called 'VPN-A'. Which command should they use?

Which two commands can be used to display real-time interface information? (Choose two.)

A network engineer needs to check the system's disk space usage. Which command should be used?

An administrator notices that the routing table is not updating as expected. Which command should be used to verify the routing table contents?

A network administrator is troubleshooting high CPU usage on a Juniper router. Which command helps identify which process is consuming the most CPU?

An administrator is asked to check the system log files for any error messages related to interface failures. Which command would be most efficient?

You are troubleshooting an OSPF issue on a Juniper router. The router has a single interface ge-0/0/1 with IP 10.1.1.1/30 connected to a neighbor with IP 10.1.1.2/30. OSPF is configured area 0. The 'show ospf neighbor' command shows no neighbors. 'show interfaces ge-0/0/1 terse' shows the interface is up. 'show configuration protocols ospf' shows: area 0.0.0.0 { interface ge-0/0/1.0 { passive; } } What is the problem?

Your company runs a Juniper MX480 router as the core gateway. The router has been experiencing intermittent connectivity issues with a remote site over a point-to-point OC3 link. Users report that the link goes down for a few seconds several times a day. You suspect that the issue might be related to physical layer errors or framing. You need to determine the cause and collect relevant data to present to the service provider. Which course of action should you take first?

Which two commands can be used to monitor real-time interface statistics and errors on a Junos device?

After a software upgrade, a router fails to boot with the new image. The engineer suspects the image is corrupted. What is the recommended method to recover?

A network engineer wants to schedule a reboot of a Juniper device at 3:00 AM. Which command should be used?

A network engineer needs to analyze NTP synchronization status and offset. Which command provides detailed NTP peer information including delay, offset, and jitter?

A junior engineer needs to collect a snapshot of the current system state, including routing tables, interfaces, and configuration, for a support ticket. Which command achieves this?

Which command is used to verify that the current active configuration is the same as the candidate configuration?

A network administrator wants to view the current configuration that is actively running on a Juniper device. Which operational mode command should be used?

Refer to the exhibit. An administrator notices the /var partition is nearly full. Which command can be used to safely reclaim disk space?

A technician needs to monitor routing table updates in real time. Which command provides continuous output of routing changes?

Which TWO commands can be used to view the current routing table entries for IPv4 unicast routes?

Refer to the exhibit. An engineer notices that input drops are increasing. What is the most likely cause?

A technician needs to view the last 50 log messages from the system log file. Which command accomplishes this?

A network administrator needs to check the current software version and hardware model of a Juniper device. Which command should the administrator use?

An administrator is troubleshooting a Junos device that is dropping packets. The administrator wants to see the real-time traffic statistics for interface ge-0/0/0, including packets per second and errors, updated every second. Which command should the administrator use?

A technician notices that the /var partition is filling up on a Juniper device. Which action would be most appropriate to free up space while preserving critical logs?

Which three steps are part of a typical software upgrade process on a Juniper device? (Choose three.)

Which command displays the status of all configured interfaces, including administrative and operational status?

A network engineer suspects a hardware issue on an interface. Which command provides the most detailed hardware error counters, including CRC errors, framing errors, and runts?

Which two commands display the IPv4 unicast routing table? (Choose two.)

A junior administrator wants to view only the operational state of interface ge-0/0/1, including its link status and protocol state. Which command should they use?

An operator wants to monitor the temperature and voltage sensors on a Juniper chassis. Which command displays current sensor readings?

A network administrator notices that the CPU utilization on an MX240 router has been consistently above 90% for the past hour. Users are reporting intermittent connectivity issues. The administrator logs in and runs 'show system processes extensive' which shows the Routing Protocol Daemon (rpd) consuming 70% of the CPU. Further investigation reveals that the router has over 5000 BGP prefixes from multiple peers. The administrator suspects that the high CPU is due to continuous route processing. What should the administrator do to immediately reduce CPU load while maintaining network stability?

A technician is troubleshooting a connectivity issue and needs to see the path packets take to a remote host. Which Junos command is appropriate?

A router is experiencing intermittent packet loss. The engineer runs 'show interfaces ge-0/0/0 extensive' and notices a high number of input errors but no output errors. What is the most likely cause?

Which TWO methods can be used to restore a previous configuration on a Juniper device? (Select two.)

Which THREE operational commands are used to monitor interface statistics and status? (Select three.)

A network engineer notices that traffic to a critical server is being dropped intermittently. The server is reachable via a static route on the Juniper router. The engineer checks the routing table and sees the route is present. Which operational command should the engineer use next to isolate the issue?

A BGP session is flapping. The engineer runs 'show log messages' and sees 'BGP recv Notification' with error code 'Cease'. What does this indicate?

An administrator suspects that an interface is flapping but the router is remote and the connection is intermittent. The administrator wants to monitor the interface status without maintaining an SSH session. Which approach should be used?

A network engineer needs to verify the checksum of a downloaded Junos image before installation. Which command is used?

An engineer needs to check the last time the configuration was changed. Which command provides this information?

Which two events typically trigger a change to the routing table? (Choose two.)

You are a junior network engineer tasked with upgrading the Junos OS on a pair of EX3400 switches that are in a Virtual Chassis. You have downloaded the new software image to the primary switch. Before performing the upgrade, you must verify the image's integrity and check the current version. Which sequence of commands should you use?