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,
7 K3 M: Z- Z6 I# y! Nthe 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
9 M; H& g. A5 g3 h# R8 P" T/ `there for enabling BGP to run on this network?
: q$ t! L1 l( T' D9 a$ f( I( C/ g% H, _A. EBGP multihop will need to be configured for this to work.
( T+ W1 V8 e* d/ z! ]B. This should work with normal BGP peering, with no additional configuration on the BGP speakers or the firewall.
: U; @3 d4 t6 d: S( ^C. The BGP protocol port must be opened on the firewall
$ y8 M5 J# N8 C+ z( _: z( n$ ~D. There is no way to make BGP work across a firewall.


4 \0 E/ N' L: V0 E+ `, z409,415,415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
- J# J; p; K3 A. P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

% }0 G, s4 C: B
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。