G4S Network Engineer Interview Questions and Answers

OSPF (Open Shortest Path First) is a routing protocol used to determine the best path for data packets in a network.

• OSPF is a link-state routing protocol

• It uses Dijkstra's algorithm to calculate the shortest path

• OSPF routers exchange link-state advertisements (LSAs) to build a topology map

• It supports VLSM (Variable Length Subnet Masking) and CIDR (Classless Inter-Domain Routing)

• OSPF areas are used to divide large netwo

BGP (Border Gateway Protocol) is a routing protocol used to exchange routing information between different autonomous systems on the internet.

• BGP is used to make routing decisions based on network policies, path attributes, and network reachability.

• It operates on TCP port 179 and uses TCP connections to exchange routing information.

• BGP routers maintain a table of IP prefixes and their corresponding AS paths to determin...read more