Exam NSE7_EFW-7.2 topic 1 question 10 discussion

Option A: External BGP (EBGP) exchanges routing information. True. The AS numbers for the neighbors (65060, 65075, and 65501) are different from the local AS number (65117), indicating these are EBGP sessions, as EBGP connects peers in different ASes. Option B: The BGP session with peer 10.127.0.75 is established. True. The State/PfxRcd column for 10.127.0.75 shows a value of 1, meaning the session is established, and it is successfully receiving one route from the peer. Option C: The router 100.64.3.1 has the parameter bfd set to enable. False. There is no explicit evidence in the output about the bfd parameter being enabled. This cannot be determined from the given information. Option D: The neighbors displayed are linked to a local router with the neighbor-range set to a value of 4. False. The V column (BGP version) shows 4, which indicates the BGP protocol version used. This does not imply any specific neighbor-range configuration.

@truserd--correction: "4" in response D refers to BGP version 4, not IP version 4. BGPv4 will be used for IPv4 and IPv6. Everything else you state is correct.

A and B are correct.

It does not matter if the ASNs are private or public. What matters is that the neighbors' ASNs are different than the local ASN which makes it EBGP

A and B are correct. Page 210 in the Study Guide

Page 210 in the Study Guide gives a good overview of the command get router info bgp summary and it's output. C - You can't see if BFD is enabled with get router info bgp summary. For that you would run get router info bfd neighbor. So C doesn't quite make sense as a correct answer, as the information to answer that is lacking. D: Is just plain wrong, the "4" they are reffering to, and which you see in the output refers to IPv4 which is being used in the BGP configuration. Thus A & B is correct. A because the peer state is indeeed established, showing up-time and that is has received 1 prefix. B because the peers are indeed eBGP peers and are exchanging routing-information.

... or they took the documentary AS number space to simulate ebgp. Somehow confusing. If this is the case, I would take A and B

Think I have to revert. B states that "external" bgp exchanges routes. Oversaw that we have here no public AS range. 0-64.495 would bei public 65.512-65.534 is private

A and B

The answer is AB