Q1. What is the Multicast IP of EIGRP? OSPF?
Q2. What is the port number of DNS Service? On which layer Does it work?
Q3. When TCP 53 is used in DNS communication?
Q4. Is IPX a Routed Protocol or Routing? What about BGP?
Q5. What is the AD value or ISIS? RIP? OSPF? BGP?
Q6. Can two workstations within the same VLANs communicate without Default Gateway? If yes, then why do we need Default Gateway?
Q7. If I set IP ADDRESS 10.1.1.15 , SUBNET is 255.255.255.0 on a workstation. Can I assign 10.1.2.1 as Default Gateway on the same workstation? What is wrong with this configuration
Q8. Router R1 , Router R2 , Router R3 are connected in a single line i.e. R1 à R2 à R3 . R1 can ping R2, R2 can ping R3. R1 can’t ping R3. What could be the reason?
Q9. If one machine has IP address 192.168.11.45, subnet mask 255.255.255.224 , Then what will be the first and last valid IP address of Segment?
Q10. Do we require redistribution command while exchanging routes of IGRP and EIGRP? If no, why?
Q11. Which layer deals with Packets? Frames? Segments?
Q13. What do you mean by LSAs? Which LSA deals with Inter Area Communication?
Q14. Why do we need Virtual Link in OSPF?
Q15. Can we configure Transit area in Virtual Link as Stub Area
Q16. How to check SRTT time, RTO in EIGRP
Q17. What is SIA state in EIGRP and How can we avoid it?
Q18. How can we check the current ACTIVE routes in EIGRP Topology? What is the command
Q19. What is the Feasible Distance and Feasible condition in EIGRP
Q20. What is the meaning of PASSIVE state in EIGRP
Q21. How to check Total number of EIGRP routes in Routing Table?
Q22. What is ABR and ASBR? When do we call a Router as Area Border Router?
Q23. What are the reasons for “Neighborship formation problems”
Q24. What is Passive Interface? Can it be implemented on Global Level?
Q25. What is Seed Metric in Redistribution?
Q26. What is the meaning of OIA, OE1, OE2, ON1 , ON2, O*IA?
Q28. How many BGP AS numbers can we configure on a device?
Q29. How can we check whether BGP Is running or not –without using “show” commands?
Q30. What is the concept of “Route Reflector” and “Confederation” in BGP?
Q31. What happens when we connect two routers back to back using two Cables versus connecting Switches in similar way?
Q32. Does router forward broadcast by default? If no, How can we do so?
Q33. What is PVST and PVST+ and difference between these two?
Q34. What is Private VLAN? What is Isolated vlan, Community VLAN and Primary VLAN?
Q35. What is Bridge Priority, Its default value? What is the timer of Learning State in STP?
Q36. How can you configure BPDUGuard on a switch port? How it is different than Portfast?
Q37. Do we require Uplinkfast or Backbonefast in RSTP?
Q38. What is 802.1Q ? How it’s different than ISL encapsulation?
Q39. What is the purpose of “Switchport host” command?
Q40. How can you check which switchport is Trunk or access port?
Q41. How can you check how many mac addresses are being learned on a Switchport?
Q42. What could be the reason of not being able to configure “IP address “ on a port of multilayer switch?
Q43. What is the Default timer of ARP? What is Proxy ARP?
Q44. How to enable Routing functionality on Multi layer Switch?
Q45. What is port channeling? What is the LACP and PAGP? Differences between these two Protocols?
Q46. What is NX OS? How many images we need to have in order to operate Cisco Nexus Devices?
Q47. What is VPC in Nexus? Peer Keepalive Link? Pee link?
Q49. Can we use PAGP in VPC?
Q50. How VSS is different from VPC?