Computer Science Interview Questions on Computer Network

· Can you explain the concept of routing protocol?
· What activities does routing protocol perform?
· What metrics are used by routing protocols to determine the best path?
· Can you explain what is interior and exterior routing protocols?
· Can you explain the concept of intradomain and interdomain routing protocols?

· Can you explain the concept of internet work and intranet work routing protocols?
· Which method does routing protocol use to determine shortest path?
· What is distance vector routing protocol?
· How do routers share information in Distance Vector routing?
· Can you explain the count-to- infinity problem in distance vector?

· How is metric or the cost calculated for Distance Vector routing protocol?
· Can you explain how Link-State routing protocols work?
· Can you explain the concept of broad cast and multi-cast?
· What’s the difference between distance vector and link-state protocol?
· Can you explain Active and Passive route?

· Can you explain OSPF?
· How does OSPF populate route table?
· What are the different tables in OSPF?
· Can you explain different areas in OSPF?
· Can you explain different router types in OSPF?
· Can you explain Designated Router and Backup designated router?

· Can you explain different router states in OSPF?
· Can you explain different OSPF packet types?
· How SPF algorithm does the route determination?
· Can you explain autonomous system?
· What are different types of dynamic protocols?
· Can you explain autonomous numbers in EGP?

· What is BGP?
· What is the concept of BGP speakers and Peers?
· What is EBGP and IBGP?
· What is RIB?
· Can you explain the concept of BGP confederations?
· What are BGP path attributes?

· How are routing neighbors discovered in BGP?
· Can you explain how BGP does the decision process?
· Can you define what a FIREWALL is?
· What are the different types of firewalls?
· Can you explain packet filtering firewall?
· Can you explain circuit level gateway?
· Can you explain stateful inspection?
· What is Application Gateway?

· Is NAT a firewall?
· Are personal firewall actually firewalls?
· What is the meaning of bastion host?
· What are the different types of firewall architectures?
· Can you explain dual home architecture?
· Can you explain screened host architecture?
· Can you explain screened subnet architecture?

· What is IP spoofing and how can it be prevented?
· With which firewall have you worked with? How was the experience?
· Can you explain the difference between trusted and untrusted networks?
· What’s the difference between Symmetric and Asymmetric cryptosystem?
· What are the different symmetric algorithms?

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