The following output on Router R1 lists details of a BGP route for 190.1.0.0/16.  Which of the following is true based on this output?（）
R1# show ip bgp 190.1.0.0/16
BGP routing table entry for 190.1.0.0/16, version 121
Paths: (1 available, best #1, table Default - IP - Routing - Table)
Advertised to update - groups:
1
1 2 3 4
1.1.1.1 from 2.2.2.2 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best

单项选择题The following output occurred as a result of the show ip bgp command on Router R1. The output shows all BGP table entries on R1. How many iBGP - learned routes exist on this router?（） *>i181.0.0.0 8 10.100.1.1 0 100 0 1 2 111 112 i *>i182.0.0.0 8 10.100.1.1 0 100 0 1 2 2 22 i *>i183.0.0.0 8 10.100.1.1 0 100 0 1 2 i *>i184.0.0.0 8 10.100.1.1 0 100 0 1 2 i *> 192.135.250.0 28 192.168.1.6 0 3 4 i

A. 1
B. 2
C. 3
D. 4
E. 5

单项选择题R1 in ASN 1 with loopback1 address 1.1.1.1 needs to be configured with an iBGP connection to R2 with loopback2 IP address 2.2.2.2. The connection should use the loopbacks. Which o f the following commands is required on R1?（）

A. neighbor 1.1.1.1 remote- as 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 ibgp -multihop 2
E. neighbor 2.2.2.2 ibgp - mode

单项选择题Router R1 has eBGP connections to I1 and I 2, routers at the same ISP. The company that owns R1 can use public address range 130.1.16.0 20. The following output lists all the IP routes in R1s routing table within this rangE. Which of the following answers would cause R1 to advertise the 130.1.1 6.0 20 prefix to its eBGP peers?（） R1# show ip route 130.1.16.0 255.255.240.0 longer - prefixes ! lines omitteD... O 130.1.16.0 24 [110 3] via 10.5.1.1, 00:14:36, FastE thernet0 1 O 130.1.17.0 24 [110 3] via 10.5.1.1, 00:14:36, FastEthernet0 1 O 130.1.18.0 24 [110 3] via 10.5.1.1, 00:14:36, FastEthernet0 1

A. Configure R1 with the network 130.1.16.0 mask 255.255.240.0 command.
B. Configure R1 with the network 130.1.16 .0 mask 255.255.240.0 summaryonly command.
C. Redistribute from OSPF into BGP, filtering so that only routes in the 130.1.16.0/20 range are redistributed.
D. Redistribute from OSPF into BGP, filtering so that only routes in the 130.1.16.0/20 range are redistributed, and create a BGP summary for 130.1.16.0/20.

单项选择题The fol lowing line of output was extracted from the output of the show ip bgp command on Router R1. Which of the following can be determined from this output?（） Network Next Hop Metric LocPrf Weight Path * 130.1.1.0 28 1.1.1.1 0 1 2 3 4 i

A. The route is learne d from an eBGP peer
B. The route has no more than three ASNs in the AS_PatH
C. The route is the best route for this prefix
D. None of these facts can be positively determined by this output

单项选择题The following output occurs on Router R1. Which of the following cannot be determine d from this output?（） R1# show ip route 180.1.1.0 255.255.255.240 Routing entry for 180.1.1.0 28 Known via bgp 2 , distance 20, metric 0 Tag 3, type external Last update from 192.168.1.2 00:10:27 ago Routing Descriptor Blocks: * 192.168.1.2, from 19 2.168.1.2, 00:10:27 ago Route metric is 0, traffic share count is 1 AS Hops 2 Route tag 3

A. The type of BGP peer (iBGP or eBGP) that advertised this route to R1
B. R1's ASN
C. The next - hop router's ASN
D. The AS_Path length