Q) What is the use of HSRP?
A: HSRP is used to provide default gateway redundancy.
Q) What is the maximum number of HSRP groups that can be created in the router?
A: Maximum 16 groups.
Q) What is the HSRP virtual MAC address
A: 0000.0c07.acxx
Q) What are the maximum number of routers that can be present in a group?
A: Maximum 16 routers can be present in a group.
Q) HSRP uses TCP or UDP?
A: HSRP uses UDP port number 1985
Q) What is the Source IP & Destination IP address of HSRP Hello message?
A: Source IP address = IP address of the Primary Interface
Destination IP address = 224.0.0.2
Q) Is it possible to configure HSRP on Multi-Layer Switch (MLS)?
A: Yes it is possible to configure HSRP on MLS (3560) switches...
Q) What are the HSRP default Hello and Hold Down Timers?
A: Hello Timer = 3 seconds
Hold Down Timer = 10 seconds
Q) What is the difference between Active and Standby router in HSRP?
A: Active Router: Router which is responsible to forward the data
Standby Router: Router which is the backup to the active router.
Q) What is the difference between HSRP version 1 and HSRP version 2?
A: 1) HSRP version 1 supports 256 groups ranging from 0 to 255, HSRP version 2 supports 4096 groups ranging from 0 to 4095
2) HSRP version 1 uses the multicast address for sending hello messages is 224.0.0.2, HSRP version 2 uses the multicast address for sending hello messages is 224.0.0.102
3) HSRP version 1 and Version 2 are having different virtual mac addresses.
4) HSRP version 2 allows support for IPV6 whereas HSRP version 1 does not support.
Q) If active router LAN interface is up but the line protocol is down, In this case, whether standby router will become active router?
A: Yes standby router will become an Active router if the interface is up but the line protocol is down.
Q) What is the default priority and default group number for HSRP?
A: Default Priority: 100
Default Group number: 0
Q) If you perform traceroute, which IP address you will see in the reply (Physical or virtual IP )?
A: Physical IP address
Q) How many states present in HSRP?
A: 6 states present in HSRP
1) Initial
2) Learn
3) Listen
4)Speak
5)Standby
6) Active
Q) When Active Router goes down but the standby router is not becoming active, What can be the issue?
A:
--> Priority needs to be correctly configured on the standby router.
--> Virtual IP configuration on the Standby Router
--> Reachability ( Both Active and Standby routers need to be in the same subnet).
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A: HSRP is used to provide default gateway redundancy.
Q) What is the maximum number of HSRP groups that can be created in the router?
A: Maximum 16 groups.
Q) What is the HSRP virtual MAC address
A: 0000.0c07.acxx
Q) What are the maximum number of routers that can be present in a group?
A: Maximum 16 routers can be present in a group.
Q) HSRP uses TCP or UDP?
A: HSRP uses UDP port number 1985
Q) What is the Source IP & Destination IP address of HSRP Hello message?
A: Source IP address = IP address of the Primary Interface
Destination IP address = 224.0.0.2
Q) Is it possible to configure HSRP on Multi-Layer Switch (MLS)?
A: Yes it is possible to configure HSRP on MLS (3560) switches...
Q) What are the HSRP default Hello and Hold Down Timers?
A: Hello Timer = 3 seconds
Hold Down Timer = 10 seconds
Q) What is the difference between Active and Standby router in HSRP?
A: Active Router: Router which is responsible to forward the data
Standby Router: Router which is the backup to the active router.
Q) What is the difference between HSRP version 1 and HSRP version 2?
A: 1) HSRP version 1 supports 256 groups ranging from 0 to 255, HSRP version 2 supports 4096 groups ranging from 0 to 4095
2) HSRP version 1 uses the multicast address for sending hello messages is 224.0.0.2, HSRP version 2 uses the multicast address for sending hello messages is 224.0.0.102
3) HSRP version 1 and Version 2 are having different virtual mac addresses.
4) HSRP version 2 allows support for IPV6 whereas HSRP version 1 does not support.
Q) If active router LAN interface is up but the line protocol is down, In this case, whether standby router will become active router?
A: Yes standby router will become an Active router if the interface is up but the line protocol is down.
Q) What is the default priority and default group number for HSRP?
A: Default Priority: 100
Default Group number: 0
Q) If you perform traceroute, which IP address you will see in the reply (Physical or virtual IP )?
A: Physical IP address
Q) How many states present in HSRP?
A: 6 states present in HSRP
1) Initial
2) Learn
3) Listen
4)Speak
5)Standby
6) Active
Q) When Active Router goes down but the standby router is not becoming active, What can be the issue?
A:
--> Priority needs to be correctly configured on the standby router.
--> Virtual IP configuration on the Standby Router
--> Reachability ( Both Active and Standby routers need to be in the same subnet).
Follow More Networking Interview Questions on my blog:
https://www.kareemccie.com/search/label/Interview%20Questions
Connect with me on Linkedin: https://www.linkedin.com/in/mahmmad-kareemoddin-7a177342/
Very Informative...Thanks
ReplyDeleteit's really more informative for interview.
ReplyDeleteThanks
ReplyDeletevery informative from interview perspective
ReplyDeleteExcellent in depth info. Thanks
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