How do you check interface status and IP addresses on a Cisco router? Learn how the “show ip interface brief” command provides a quick summary of all interfaces and their IP assignments—essential knowledge for the Cisco Certified Field Technician (CCT) exam.
Table of Contents
Question
A technician wants to check the interface status and assigned IP addresses on a router. What command should they use?
A. show version
B. show interfaces trunk
C. show running-config
D. show arp
E. show ip interface brief
Answer
E. show ip interface brief
Explanation
This command displays the status of all interfaces, including IP addresses and whether they are up or down.
The correct command to check both the status and assigned IP addresses of all interfaces on a Cisco router is show ip interface brief.
- The show ip interface brief command displays a concise table listing all router interfaces, their assigned IP addresses, and their operational status (up/down) for both the physical and protocol layers.
- The output includes columns for the interface name, IP address, software status (OK?), assignment method (manual/DHCP), interface status (up/down), and protocol status (up/down).
- This command is widely used for rapid troubleshooting and verification, allowing technicians to quickly identify which interfaces are active, which have IP addresses, and if any are administratively down or experiencing issues.
Cisco Certified Field Technician (CCT) certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Cisco Certified Field Technician (CCT) exam and earn Cisco Certified Field Technician (CCT) certification.