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Which of the following statements is NOT true about BGP peers?
- eBGP peers use TCP to communicate
- eBGP peers use port 179 by default
- eBGP peers do not update the AS_Path attribute before sending updates to another eBGP peer
- iBGP peers do not update the AS_Path attribute before sending updates to an iBGP peer
Explanation:
External BGP (eBGP) peers do update the AS_Path attribute before sending updates to another eBGP peer. This helps to maintain the path back to the source of the update.
eBGP peers use TCP to communicate, and they do so on port 179 by default.
Internal BGP (BGP) peers are routers that reside in the same AS. iBGP peers do not update the AS_Path attribute before sending updates to an iBGP peer. That is only done when an update is sent from an eBGP peer to another eBGP peer.
Objective:
Layer 3 Technologies
Sub-Objective:
Explain BGP attributes and best-path selection
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