The following output was taken from the show ip bgp command on Router R2. In this case, which of the following commands are most likely to already be configured on R2?（）
BGP router identifier 11.11.11.11, local AS number 11
...
Neighbor V AS Ms gRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
1.1.1.1 4 1 87 87 0 0 0 00:00:06 Idle
(Admin)
2.2.2.2 4 3 173 183 41 0 0 00:58:47

单项选择题The following output, taken from a show ip bgp command on Router R1, lists two neighbors. In what BGP neighbor state is neighbor 1.1.1.1?（） Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up Down State PfxRcd 1.1.1.1 4 1 60 61 26 0 0 00:45:01 0 2.2.2.2 4 3 153 159 26 0 0 00:38:13 1

A. Idle
B. Opensent
C. Active
D. Established

单项选择题Enterprise Router R1, in ASN 1, connects to ISP Router I1, ASN 2, using eBGP. There are two parallel serial links between the two rou ters. The implementation plan calls for each router to base their BGP TCP connection on their respective loopback1 interfaces, with IP addresses 1.1.1.1 and 2.2.2.2, respectively. Which of the following commands would not be part of a working eBGP confi guration on Router R1?（）

A. router bgp 1
B. neighbor 2.2.2.2 remote- as 2
C. neighbor 2.2.2.2 update - source loopback1
D. neighbor 2.2.2.2 multihop 2

多项选择题Enterprise Router R1, in ASN 1, connects to ISP Router I1, ASN 2, using eBGP. The single serial link b etween the two routers uses IP addresses 10.1.1.1 and 10.1.1.2, respectively. Both routers use their S0 0 interfaces for this link. Which of the following commands would be needed on R1 to configure eBGP?（）

A. router bgp 2
B. router bgp 1
C. neighbor 10.1 .1.2 remote - as 2
D. neighbor 10.1.1.2 Update - source 10.1.1.1
E. neighbor 10.1.1.2 Update- source S0/0

多项选择题The following terms describe various design options for Enterprise connectivity to the Internet.Which of the follow ing imply that the Enterprise connects to two or more ISPs？（）

A. Single Homed
B. Dual Homed
C. Single Multihomed
D. Dual Multihomed

单项选择题Which of the following is the primary motivation for using BGP between an Enterprise and its ISPs?（）

A. To influence the choice of best path (best route) for at least some routes
B. To avoid having to configure static routes
C. To allow redistribution of BGP routes into the IGP routing protocol
D. To monitor the size of the Internet BGP table