Once the initial route exchange has been completed, how frequently does BGP automatically sent route updates?
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A. B. C. D.D
Once the initial route exchange has been completed BGP automatically sends route updates as needed. BGP uses TCP to provide reliable communication, which ensures that BGP neighbors never miss an update. A system of keepalives also allows each BGP peer to ensure that its neighbors are still function properly. If a neighbor goes down, the BGP speaker deletes all routes learned from that peer and updates its other peers accordingly.
BGP (Border Gateway Protocol) is a protocol used for exchanging routing information between different Autonomous Systems (ASes) on the internet. BGP maintains a table of network prefixes and the paths to reach those prefixes.
Once the initial route exchange has been completed, BGP only sends route updates when there is a change in the routing information. This is because BGP is designed to be a slow and stable protocol, and sending frequent updates can cause unnecessary overhead and instability in the network.
In other words, BGP sends route updates only when there is a change in the network topology, such as when a new network prefix is added or an existing prefix is removed. BGP also sends updates when there is a change in the path attributes of a prefix, such as changes in the AS path or the next hop address.
The frequency of BGP updates depends on the network topology and the specific configuration of the BGP routers. BGP routers can be configured to use timers to control the frequency of updates. The timers can be set to expire after a certain amount of time has elapsed or after a certain number of updates have been sent.
So, the correct answer to the question is D - BGP sends route updates as needed, i.e., when there is a change in the routing information. BGP does not send updates on a fixed schedule, such as every hour or when a routing policy is updated.