OSPF

• Describe OSPF in your own words.

• OSPF areas, the purpose of having each of them

• Types of OSPF LSA, the purpose of each LSA type

• What exact LSA type you can see in different areas

• How OSPF establishes neighboor relation, what the stages are

• If OSPF router is stucked in each stage what the problem is and how to troubleshoot it

• OSPF hierarchy in the single or multi areas. Cool OSPF behavior in broadcast and nonbroadcast

• Draw the diagram of typical OSPF network and explain generally how it works, DR, BDR, election, ASBR, ABR, route redistribution and summarization

STP

• How it works and the purpose

• Diff types (SSTP, MSTP, RSTP) Cisco - PVST/PVST+

• root election

• Diff. port stages and timing for convergence

• Draw the typical diagram and explain how diff types of STP work

• What ports are blocking or forwarding

• How it works if there are topology changes

ACLs

• What are they

• Diff types

• Write an example if you want to allow and to deny…

• Well-known port numbers (DNS - 53 and etc…)

QOS

• What is that

• What is the diff b/w L2 and L3 QoS

• How it works

Network:

• Draw the typical network diagram you have to deal with

• explain how it works

• What part of it you are responsible

• firewall, what is that, how it works, how it is diff from ACLs

• What problems with the network you had had and how you solved it.

• What are the ways to troubleshoot the network, techniques, commands

• network security, ways to achieve it

Switching:

• VLANs

• STP

• How a L2 switch works with broadcast, unicast, multicast, known/unknown traffic

• VRRP, GLBP

• port monitoring and mirroring

• L3 switch, how it works

• PIM sparse and dense modes