Tools and Techniques

Troubleshooting a network issue, you find that the router's interface is up but the link is down. What is the most likely cause?

You need to verify the reachability of a specific IP address across your network. Which command is most appropriate for this task?

When configuring OSPF on a router, you notice that the router is not establishing an adjacency with its neighbor. What should you check first?

A network device’s CPU usage is abnormally high. Which command will help you identify the process causing the high CPU utilization?

You are configuring a switch port to prevent unauthorized devices from connecting. Which feature would you implement?

A router is experiencing intermittent connectivity issues with a remote site. What tool would help you analyze the path packets are taking?

To determine the status and configuration of a BGP peer, which command would you use?

What tool can you use to verify that DNS is resolving domain names to IP addresses correctly?

If a network interface is in an err-disabled state, what command would help you determine the reason?

Which command would you use to check the bandwidth utilization of an interface?

You want to capture traffic on a specific interface to analyze network issues. What tool would you use?

Which command would you use to verify the configuration of a static route?

To see which devices are currently using a specific VLAN, which command would you use?

You need to verify the configuration of an access control list (ACL). Which command provides this information?

What command helps you troubleshoot network issues by displaying the ARP table?

When configuring GRE tunnels, which command verifies that the tunnel is up and operational?

What command would you use to check the status of a routed interface?

You are configuring HSRP and need to verify the status of the virtual IP address. Which command should you use?

A network interface is not receiving any traffic. Which command helps you check if the interface is administratively down?

To identify the active routing protocols on a router, which command would you use?

To find out the software version and system uptime of a router, which command is appropriate?

Which command displays the list of all IP addresses that are currently assigned to interfaces on a device?

To view the current configuration of OSPF on a router, which command should you use?

What command would you use to monitor the performance and statistics of routing protocols?

You suspect a network loop is causing high CPU usage. Which command helps you identify the spanning-tree status?

To find out the amount of traffic passing through an interface, which command would you use?

You want to configure a device to use SNMP for network monitoring. What command will help you check the current SNMP configuration?

How can you view the configuration of a VTP domain on a switch?

To verify the MTU size of an interface, which command would you use?

Which command would help you identify the configuration errors related to QoS?

When using NAT, which command displays the NAT translations currently being performed?

To determine which processes are using the most memory on a router, which command should you use?

You want to confirm that IPv6 routing is enabled on your router. What command provides this information?

To check the status of Layer 2 interfaces, including VLANs, which command is used?

You need to view the configuration of a device’s wireless interfaces. Which command should you use?

To examine detailed statistics of BGP peers, which command is most appropriate?

You suspect a routing loop in OSPF. Which command will help you identify the problem?

To check the status of a specific VPN tunnel, which command would you use?

What command would help you troubleshoot issues with routing redistribution?

You want to confirm which interfaces are part of a specific OSPF area. Which command should you use?

Which command helps in monitoring DHCP leases on a router?

To view the number of BGP prefixes learned by a router, which command is used?

You need to check the status of a device’s wireless radio. Which command would you use?

To see the status of trunk links on a switch, which command would you use?

When troubleshooting multicast issues, which command helps you view the multicast routing table?

To display the current status and configuration of a VPN, which command should you use?

You want to check the list of current sessions and their state on a firewall. Which command would you use?

To verify if an interface is participating in the correct VLAN, which command should you use?

You want to check the IP SLA configuration and status on a device. Which command provides this information?

To examine the configuration and status of a network switch’s port-channel, which command should you use?