Top 77 Routing Interview Questions [UPDATED 2020]

by | Jan 24, 2018 | Free Resources

Question 1 What is Routing?

Question 2 What are the different types of ports of a Router?

Question 3 What is a Router?

Question 4 What are the different ways to manage a ROUTER?

Question 5  What are the different types of memory in router?

Question 6 What are the possible locations of IOS image?

Question 7  What does it mean to have fast or autonomous switching “enabled” and “disabled” on the same interface?

Question 8  How is the load shared between two parallel lines of equal capacity when these lines are configured for load balancing?

Question 9  What should be the value of Configuration Register for Bootstrap to load IOS from FLASH?

Question 10 What is the command to backup IOS to TFTP server?

Question 11  What is the command to copy running-config to startup config?

Question 12  What is the command to display the current running configuration?

Question 13  What does route summarization mean?

Question 14 When does a Cisco router generate a source quench?

Question 15 What is ROM Monitor?

Question 16 What are the different modes in Router?

Question 17 What is the command to enter PRIVILEGE mode from USER mode?

Question 18  What is the command to enter Global Configuration mode from PRIVILEGE Mode?

Question 19 What is Bootstrap program responsible for?

Question 20  What can be done with ROM Monitor?

Question 21  What is the command to reboot a Router?

Question 22  Define static routing?

Question 23 What is Default Route?

Question 24 What is Unicast?

Question 25  What is Multicast?

Question 26 What is broadcast message?

Question 27  What is a Dynamic Routing?

Question 28  What is IGP?

Question 29 When does a Cisco router initiate a routing request out its interfaces?

Question 30  What is the difference between the ip default-gateway, ip default-network, and ip route commands?

Question 31 Enhanced Interior Gateway Routing Protocol (EIGRP) redistributes with the IGRP IP routing protocol automatically. Does EIGRP also interact with the Routing Information Protocol (RIP) IP routing protocol?

Question 32  What are the sub-modes of Global configuration mode?

Question 33 What is the command to backup IOS to TFTP server and in which mode it is done?

Question 34 How do I configure my router to prefer an Open Shortest Path First (OSPF) route over an EIGRP route when the route is learned from both sources?

Question 35 What is an Autonomous System?

Question 36  What is Administrative Distance (AD)?

Question 37 What are the Range of AD values?

Question 38  Is there a performance advantage when using the IP access list keyword established on an extended ACL? Does using “established” make the access list more vulnerable? Do you have specific examples of the usage?

Question 39 What is the Command to see Cisco device neighbors?

Question 40  Does the use of extended IP access control lists (ACLs) filter regular routing updates (such as OSPF)? Do I need to explicitly permit the multicast IPs used by routing protocols (such as and, in the case of OSPF) for updates to ensure the proper working of routing protocols?

Question 41 What is the command to upgrade IOS from a TFTP server?

Question 42  Can an interface have more than one ip access-group statement in its configuration?

Question 43  Can I configure two interfaces in the same subnet (t0 = and t1

Question 44 Is it possible to have duplicate ip addresses for two serial interfaces that belong to the same router?

Question 45 I have primary and secondary IP addresses configured on an Ethernet interface and my router is running RIP (a distance vector routing protocol). How does split-horizon affect the routing updates?

Question 46 What is to be done in order for the router to use the newly copied IOS image from TFTP to Flash?

Question 47 What is a Static Route? What is the Syntax for Static Route?

Question 48 What are the advantages and disadvantages of Static Routing?

Question 49  What is Distance-Vector Routing Protocol?

Question 50 What is Metric?

Question 51 What are the maximum number of secondary IP addresses that can be configured on a router interface?

Question 52 How do I connect two different ISPs and route different traffic to different ISPs?

Question 53  How do you limit the number of sessions when a customer accesses the network?

Question 54  What is a Dynamic Route?

Question 55 What is a Routed Protocol?

Question 56 What is Routing Protocol?

Question 57  What is the purpose of ports 2228 and 56506?

Question 58 What is EGP?

Question 59  Does the interface subcommand no arp arpa disable the Address Resolution Protocol (ARP) function for a router interface?

Question 60 Would it be possible to configure a router for a Ethernet and a serial subnet? Does IGRP/RIPv1 support variable subnetting?

Question 61 What is the command to backup running configuration to TFTP server and in which mode it is done?

Question 62 What is the command to erase the contents of Flash?

Question 63  I have four equal cost parallel paths to the same destination. I am doing fast switching on two links and process switching on the other two. How will the packets be routed in this situation?

Question 64  What does the term threshold and timeout in IP SLA operation mean?

Question 65 What is the significance of Time mentioned in the routing table entry?

Question 66 Who does load-balancing when there are multiple links to a destination, Cisco Express Forwarding (CEF), or the routing protocol?

Question 67 What is Link-State Routing Protocol?

Question 68 What is Hybrid Routing Protocol?

Question 69  What is Convergence?

Question 70 What is Converged Network Topology?

Question 71  Can a VLAN interface and a tunnel interface have the same IP address?

Question 72 What is Virtual Routing and Forwarding (VRF)?

Question 73  What is the difference between point-to-point subinterfaces and multi-point subinterfaces?

Question 74  What is Hop Count?

Question 75  What is Bandwidth, delay, load, reliability and MTU?

Question 76 What are the Metrics for different Routing Protocols?

Question 77 What is Cost?


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