Important Interview Questions, Useful for core networking interview
- How Router Works? How Switch Works?
- Basic Switching (ARP Resolution/STP/Vlan/Tag-Untag/VTP/Trunk Protocols)
- What is Public/Private IP address?
- Subnetting/Static Routing/Dynamic Routing
- What is IGP/EGP/Distance Vector/Link State/Path Vector
- OSPF (Area Types, why they needed? / LSA Types/Neighbor State/
Election: DR/BDR)
- Difference Between OSPF & IS-IS
- BGP (Types/States/FSM/RR/Synchronization/Split Horizon)
- Access List (Standard/Extended, Why & Where?)
- Natting/Types Of NAT
- DHCP (Server/Client)
- What is Prefix List/Route-Map/Policy Based Routing
- What is DNS?, Explain DNS Process
- How Traceroute Works/TTL
- TCP/UDP Port Numbers
- What is HSRP/VRRP/GLBP in detail
- Communities/Services (ILL/VPN etc.)/Customer Types
- Packet/Route Flow (Static/OSPF/BGP/ILL/VPN)
- MPLS (Benefits Of MPLS/PHP/RT/RD/TDP/LDP
- Issues: Slowness/IP Not Reachable/Flapping/Packet Drops/
Website Not Accessible etc.
- Troubleshooting Of ILL/VPN Customers