Important Interview Questions

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Important Interview Questions – Useful for core networking interview

 

  1. How Router Works? How Switch Works?
  2. Basic Switching (ARP Resolution/STP/Vlan/Tag-Untag/VTP/Trunk Protocols)
  3. What is Public/Private IP address?
  4. Subnetting/Static Routing/Dynamic Routing
  5. What is IGP/EGP/Distance Vector/Link State/Path Vector
  6. OSPF (Area Types, why they needed? / LSA Types/Neighbor State/

Election: DR/BDR)

  1. Difference Between OSPF & IS-IS
  2. BGP (Types/States/FSM/RR/Synchronization/Split Horizon)
  3. Access List (Standard/Extended – Why & Where?)
  4. Natting/Types Of NAT
  5. DHCP (Server/Client)
  6. What is Prefix List/Route-Map/Policy Based Routing
  7. What is DNS?, Explain DNS Process
  8. How Traceroute Works/TTL
  9. TCP/UDP Port Numbers
  10. What is HSRP/VRRP/GLBP in detail
  11. Communities/Services (ILL/VPN etc.)/Customer Types
  12. Packet/Route Flow (Static/OSPF/BGP/ILL/VPN)
  13. MPLS (Benefits Of MPLS/PHP/RT/RD/TDP/LDP
  14. Issues: Slowness/IP Not Reachable/Flapping/Packet Drops/

Website Not Accessible etc.

  1. Troubleshooting Of ILL/VPN Customers