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[主观题]

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

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更多“The fol lowing line of output …”相关的问题

第1题

Router R1 has eBGP connections to I1 and I 2, routers at the same ISP. The company that ow

ns R1 can use public address range 130.1.16.0/20. The following output lists all the IP routes in R1‘s 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 thernet0/1O 130.1.17.0/24 [110/3] via 10.5.1.1, 00:14:36, FastEthernet0/1O 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.

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第2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

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第3题

The following output occurred as a result of the show ip bgp command on Router R1. The out

put 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

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第4题

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 190.1.0.0/16BGP routing table entry for 190.1.0.0/16, version 121Paths: (1 available, best 1, table Default - IP - Routing - Table)Advertised to update - groups:11 2 3 41.1.1.1 from 2.2.2.2 (3.3.3.3)Origin IGP, metric 0, localpref 100, valid, internal, best

A. R1 has a neighbor 1.1.1.1 command configured.

B. R1 has a neighbor 2.2.2.2 command configured.

C. The show ip bgp command lists a line for 190.1.0.0/16 with both a n > and an i on the left.

D. R1 is in ASN 1.

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第5题

A company uses Routers R1 and R2 to connect to ISP1 and ISP2, respectively, with Routers I

1 and I2 used at the ISPs. R1 peers with I1 and R2; R2 peers with I2 and R1.Assuming as many default s ettings as possible are used on all four routers, which of the following is true about the next - hop IP address for routes R1 learns over its iBGP connection to R2?（）

A. The next hop is I2‘s BGP RID

B. The next hop is I2‘s IP address used on the R2 - I2 neigh bor relationship

C. The next hop is R2‘s BGP RID

D. The next hop is R2‘s IP address used on the R1 - R2 neighbor relationship

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第6题

A company uses Routers R1 and R2 to connect to ISP1 and ISP2, respectively, with Routers I

1 and I2 used at th e ISPs. R1 peers with I1 and R2; R2 peers with I2 and R1. R1 and R2 do not share a common subnet, relying on other routers internal to the Enterprise for IP connectivity between the two routers.Which of the following could be used to prevent potential routing loops in this design?（）

A. Using an iBGP mesh inside the Enterprise core

B. Configuring default routes in the Enterprise pointing to both R1 and R2

C. Redistributing BGP routes into the Enterprise IGP

D. Tunneling the packets for the i BGP connection between R1 and R2

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第7题

R1 is currently advertising prefixes 1.0.0.0/8, 2.0.0.0/8, and 3.0.0.0/8 over its eBGP con

nection to neighbor 2.2.2.2 (R2). An engineer configures a prefix list (fred) on R1 that permits only 2.0.0.0/8 and then enables the filter with the neighbor R2 prefix- list fred out command. Upon exiting configuration mode, the engineer uses some show commands on R1, but no other commands.Which of the following is true in this case?（）

A. The show ip bgp neighbor 2 .2.2.2 received -routes command lists the three original prefixes.

B. The show ip bgp neighbor 2.2.2.2 advertised - routes command lists the three original prefixes.

C. The show ip bgp neighbor 2.2.2.2 routes command lists the three original prefixes.

D. T he show ip bgp neighbor 2.2.2.2 routes command lists only 2.0.0.0/8.

E. The show ip bgp neighbor 2.2.2.2 advertised - routes command lists only 2.0.0.0/8.

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第8题

Which of the following three BGP filtering methods enabled with the neighbor command will filter BGP prefixes based on the prefix and prefix length？（）

A. A neighbor distribute - list out command, referencing a standard ACL

B. A neighbor prefix - list out command

C. A neighbor filter - list out command

D. A neighbor distribute - list out command, referencing an extended ACL

E. A neighbor route - map out command

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第9题

Which of the following commands causes a router to bring down BGP neighbor relationships?（）

A. clear ip bgp *

B. clear ip bgp 1.1.1.1

C. clear ip bgp * soft

D. clear ip bgp 1.1.1.1 out

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第10题

An engineer is preparing an implementation plan in which the configuration needs to influe

nce BGP‘s choice of best path.Which of the following is least likely to be used by the configuration in this imple mentation plan?（）

A. Weight

B. Origin code

C. AS_Path

D. Local_Pref

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