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,
0 C8 D* f! Y. A- Z! @& p; [' B" Bthe 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
! U- p* I/ k8 mthere for enabling BGP to run on this network?
. H! b9 }/ U% R. }* x3 TA. EBGP multihop will need to be configured for this to work.
% }- _5 n) b+ o! yB. This should work with normal BGP peering, with no additional configuration on the BGP speakers or the firewall.
; ^8 x1 l5 G# P4 c& HC. The BGP protocol port must be opened on the firewall
( i: l( e6 y6 D/ }D. There is no way to make BGP work across a firewall.
/ r1 q$ i0 B6 b8 c
6 \4 ~+ }+ i3 s$ e9 h+ Z0 h4 @- _
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
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

3 A8 t' h: g8 c409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。