CCNA Fresher Basic Interview Questions with Answer
1: What cable is used to connect the router with the computer?
Answer: console cable.
2: Which password you will enter when escalating from user mode to privilege mode?
- Enable password
- Enable secret
- telnet password
- name of the above
- Enable secret
3: How to configure Telnet on the Cisco router?
Router (config)#line vty 0 4
Router (config-line)#password cisco
Router (config-line)#login local
When Cisco is a password and can be anything.
4: What does it mean by “0 4” with vty in command “line vty 0 4”?
It means we can have a maximum 5 concurrent sessions.
This question almost asked in every interview for 0-4 years of an experienced candidate.
Almost 2-3 questions are asked in CCNA certifications also.
5: Which command reveals the last method used to power cycle a router?
6: Which parameter can be tuned to affect the selection of a static route as a backup when a dynamic protocol is also being used?
Administrative Distance (AD Value)
7: Assuming the default switch configuration, which VLAN range can be added modified, and removed on a Cisco Switch?
8: On which switch interface would an administrator configure an IP address so that the Switch can be managed remotely?
9: Which port is used Telnet and SSH?
Telnet: port number:23
SSH: port number: 22
10: What cable type is used between switch and PC?
11: Which features automatically detect cable type in modern switches?
Auto MDI/MDI-X (Media dependent interface)
12: What is the use of the SMB port?
SMB port (TCP port number 445) is used for file sharing
13: Which FHRP protocol is Cisco proprietary?
Hot Standby Routing Protocol (HSRP)
14: How is bandwidth to a destination network calculated by EIGRP?
The lowest configured bandwidth of any interface along the route.
Here bandwidth for metric calculation is the lowest bandwidth i.e. 128 kbps
15: What is the difference between telnet and SSH?
Telnet: All data including username and password is in CLEAR TEXT.
SSH: All data including username and password is ENCRYPTED.
16: Tell me the command to show the active Telnet connections?
17: How bridge id is calculated in STP?
18: What term is used to express the thickness or height of a Switch?
19: Which routing protocol is used on the internet?
Border Gateway Protocol (BGP)
20: Tell me the name of OSI Layers.
21: At which layer of the OSI model error is detected?
Layer 2 (Data Link Layer)
22: At which layer of the OSI model does TCP operate?
Layer 4 (Transport Layer)
23: What action does a switch take if the destination MAC address is unknown?
Floods the frames to all ports except the originating port.
24: Which three STP states were replaced with the RSTP discarding state?
STP port states (802.1D)
RSTP Port States (208.1w)
25: Which type of OSPF router connects an OSPF area to non-OSPF routing domains?
26: What eliminates Switching Loops?
Spanning Tree Protocol
27: What is the default hello time of BPDU?
28: What is the AD value of OSPF BGP?
OSPF: AD Value is 110
BGP: iBGP: AD Value 200
eBGP: AD Value 20
29: What is the difference between OSPF and BGP?
OSPF is an internal gateway routing protocol used within the same Autonomous System (AS).
BGP is an exterior gateway routing protocol used between more than one AS.