H12-821_V1.0 · Question #754
BGP peers can send incremental BGP routing updates or perform periodic updates.
The correct answer is B. FALSE. BGP is an incremental-only protocol: after the initial full table exchange when a session is established, it sends updates only when routing information actually changes - it never sends periodic (time-based) full-table refreshes. Option A is wrong because the statement implies…
Question
Options
- ATRUE
- BFALSE
How the community answered
(42 responses)- A24% (10)
- B76% (32)
Explanation
BGP is an incremental-only protocol: after the initial full table exchange when a session is established, it sends updates only when routing information actually changes - it never sends periodic (time-based) full-table refreshes. Option A is wrong because the statement implies BGP supports both modes; periodic updates are simply not part of BGP's design. Unlike distance-vector protocols such as RIPv1/v2, which broadcast the entire routing table on a fixed timer, BGP was deliberately built to avoid that overhead at internet scale. BGP does send Keepalive messages on a timer, but those maintain the TCP session - they are not routing updates.
Memory tip: Think "BGP = change-triggered, RIP = clock-triggered." If nothing changes in BGP, nothing is sent (except keepalives). Periodic = RIP; Incremental = BGP.
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