CCNA networking interview questions may cover Ethernet media, Cisco IOS modes, device access, addressing, and packet forwarding. The following answers connect basic terminology with practical verification.
Use our complete CCNA interview guide and the Cisco 200-301 Premium PDF with the latest available questions and answers.
What are common Ethernet speeds?
Traditional Ethernet operates at 10 Mbps, Fast Ethernet at 100 Mbps, and Gigabit Ethernet at 1 Gbps. Modern networks also use 10, 25, 40, 100, and higher gigabit standards.
What is a rollover cable?
A rollover console cable connects a management workstation to a network device console port for out-of-band access.
What are Cisco IOS command modes?
User EXEC provides limited monitoring, privileged EXEC provides administrative commands, global configuration changes device-wide settings, and subconfiguration modes change interfaces, lines, or protocols.
How do you move between modes?
Use enable for privileged EXEC, configure terminal for global configuration, specific commands such as interface for submodes, and end or Ctrl-Z to return.
What is Telnet?
Telnet provides remote terminal access but does not encrypt credentials or traffic. SSH is preferred for secure management.
What is SSH?
Secure Shell encrypts remote management traffic. Cisco configuration normally requires addressing, a hostname, domain information, local credentials or AAA, RSA keys, and VTY settings.
What is a source and destination IP?
The source identifies the sending interface and the destination identifies the intended remote endpoint. Routers forward according to the destination IP prefix.
What is an IPv6 link-local address?
An address from FE80::/10 is used on the local link for functions including neighbor discovery and routing-protocol communication.
Which commands verify interfaces?
Use show ip interface brief, show ipv6 interface brief, show interfaces status, and show running-config.
Interview Practice
Connect through a console, configure secure remote access, verify interface state, and explain each troubleshooting step before changing the configuration.