单选题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 routesB To avoid having to configure static routesC To allow redistribution of BGP

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.

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

A router has two paths to reach another network in a different autonomous system. Neither route was generated by the local router and both routes have the same default weight an d local preference values.Which statement is true about how BGP would select the best path?（）

A. To influence one route to be preferred, its default local preference value will be changed via the use of the command bgp default local - preference 50

B. Th e router will prefer the shortest autonomous system path

C. If the command bgp always - compare - med has been given, then the router will prefer the route with the highest MED

D. The router will prefer the route with the lower MED

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 R1‘s 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.

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

A. If using IS-IS as the PE-CE routing protocol, no redistribution is required.

B. If using static routes between the CE and PE routers, no redistribution of other VPN routes is required.

C. If the PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required.

D. If RIP is the routing protocol that is used between the PE-CE routers, no redistribution is required, but any other protocol will require redistribution.

E. If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistribution.