409Q和415自己修正版答案也有不同，这题到底该选哪个？！

retest

You work as a network engineer for the company, you want to configure two BGP speakers to form an EBGP session across a firewall. On the engineer's network,
. j3 b; w* G! g3 q3 Z7 }; x; I4 @the firewall always permits TCP sessions that are initiated from the inside network (the network attached to the inside interface of the firewall). What prerequisite is
* k  F  \$ Q: P# L6 F8 R$ athere for enabling BGP to run on this network?
A. EBGP multihop will need to be configured for this to work.
) g/ x: r$ a6 D, J" H' ^  n8 }B. This should work with normal BGP peering, with no additional configuration on the BGP speakers or the firewall.
) _: z8 M1 Y' w* L1 wC. The BGP protocol port must be opened on the firewall
$ i! P# G- i( ^" ~6 [D. There is no way to make BGP work across a firewall.
: n# ~9 s9 N. n  ^. q
- h& M. B8 |: A3 @6 n$ a  d
409,415,415修正，448，429。很多答案不一致的题，怎么办？？都说以415为主，可是近期409貌似比415更准确一点。。。

5ibob

huangtidi

眞的/mg爱妳

以415自己修改版为准。    415自己修改版到目前位置还没发现有错误的答案
; ?2 T! K6 }' ^% [这题楼主自己复习一下防火墙和BGP的知识点（这题在415自己修改版里有解释）。

razgriz

) h( S; p1 N. p) @  c
409里是选c的

winddew

选A，在两端都指了neighbor的情况下，虽然从外部发起的TCP连接无法通过，但是从内发起的TCP连接是可以建立的，题目背景描述中特地提到了这个，所以只要解决了多跳的问题就可以了。