多项选择题

The following output on Router R1 lists details of a BG……

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 19 0.1.0.0/16
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

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 an ">" and an "i" on the left.
D. R1 is in ASN 1.

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多项选择题An engineer has been told to create an implementation plan to influence the choice of best BGP route on a single router using the Weight featurE. The sole Enterprise Internet - connected router, Ent 1, has neighbor relationships with Routers ISP1 and ISP2, which reside inside two different ISPs. The goal is to prefer all routes learned from ISP1 over ISP2 using Weight. Which of the following answers lists a configuration step that would not be usefu l for achieving these goals?（）

A. Configuring the neighbor weight command on Ent1.
B. Having the ISPs configure the neighbor route - map out command on ISP1 and ISP2, with the route map setting weight.
C. Configuring the set weight command inside a route map on Router Ent1.
D. Configuring a prefix list to match all class C networks.

单项选择题Router R1 learns two routes with BGP for prefix 200.1.0.0 16. Comparing the two routes, route 1 has a shorter AS_Path Length, smaller MED, the same Weight, and smaller Local PreferencE. Which of the following is true about Router R1s choice of best path for this prefix?（）

A. Route 1 is the best route.
B. Route 2 is the best route.
C. The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers .
D. Neither route is considered best.

单项选择题Router R1 learns two routes with BGP for prefix 200.1.0.0 16. Comparing the two routes, route 1 has a longer AS_Path Length, bigger MED, bigger Weight, and smaller Loca l PreferencE. Which of the following is true about Router R1s choice of best path for this prefix?（）

单项选择题An engineer is preparing an implementation plan in which the configuration needs to influence BGPs 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

多项选择题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