Exam JN0-363 topic 1 question 8 discussion

AB. Explanation: Option A: IBGP (Internal BGP) neighbors operate within the same Autonomous System (AS). Therefore, all IBGP neighbors must share the same AS number to establish a proper IBGP session. Option B: The TTL (Time-to-Live) value for BGP packets sent to external BGP (EBGP) neighbors is set to 1 by default. This ensures that EBGP sessions are typically established between directly connected routers. For longer-distance EBGP connections, you can modify the TTL using the "ebgp-multihop" command.

Per Juniper's own documentation, default TTL for eBGP is 1 for directly-connected single hop and 64 for multi-hop. The default TTL for iBGP is 255. These are the same values that all router vendors use.

TTL for iBGP neighbours I set to 1 cos iBGP peers are typically directly connected or expected to be within the same network

A and B eBGP TTL is1 iBGP TTL is 64

default Time-to-Live (TTL) value for BGP TCP connections to internal neighbors is 1, which prevents packets from being forwarded beyond the local AS.

A and B

By default, the TTL (Time-to-Live) on protocol-related packets (such as BGP TCP connections) for internal neighbors (within the same AS) is set to 1. This default TTL value helps prevent BGP packets from being inadvertently forwarded beyond the local AS.