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Some concepts in BGP
hi,
i am a beginner in networking area. during my study for BGP, i came up with some questions, i would be thankful if anyone can help.
1. Could there be any situation in which an AS in a network is purposefully configured not to send a keepalive message?
2. Why the minimum value for the hold timer in the OPEN message must be 3 secs or more?
3. Why IGP's dont scale well tl carry a full routing table?
4. what is meant by building a logicl topology on top of a physical topology?
Thanks
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