BGP 面试题与答案
问题 1. What is BGP Confederation Identifier?
BGP Confederation Identifier is a BGP attribute used in BGP confederation to identify the confederation to which a router belongs.
问题 2. Explain BGP route refresh.
BGP route refresh is a mechanism that allows a BGP router to request an immediate update of its BGP routing table from its peers without tearing down the BGP session.
问题 3. What is the purpose of the BGP ORIGIN attribute?
The BGP ORIGIN attribute indicates the origin of the route, such as whether it is learned from an Interior Gateway Protocol (IGP), EGP (Exterior Gateway Protocol), or is locally originated.
问题 4. Explain BGP TTL security check.
BGP TTL security check is a feature that checks the Time-to-Live (TTL) value in the IP header of BGP packets to prevent certain types of BGP attacks, such as TTL exhaustion attacks.
问题 5. What is the BGP MED (Multi-Exit Discriminator) attribute used for?
The BGP MED attribute is used to influence the path selection process by indicating the preferred exit point from an AS when multiple exit points exist.
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