Networking Interview Questions

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Routing

• Why is routing required• Can a switch route IP Packets• Can a routing protocol be routed• What is the TTL value of a routing protocol• How is a network layer loop prevented by IP

Networks• What is the difference between default route

and default gateway

Switching

• How many mac-address can a switch learn on it’s port

• If two switches are connected to each other using one physical link, will a loop be formed

• Which protocol is used to prevent layer 2 loops

• Does a switch understand IP address• Can a hub be connected to a switch

Transport Layer protocols

• When does TCP initiate the 4 way handshake• Why is the TCP 3 way handshake required• Which transport layer protocol does ping use• Which field in the TCP header is used to manage

data• What is the source port number when a DNS

client initiates a DNS Server request• What is the transport layer protocol used by

HTTPS

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