多选题A router is running BGP and receives more than one route for a particular prefix. Assume all the routes for this prefix have the same attributes. Which three path features would be reasons be for the rou ter to ignore some of the routes and not conside

第1题：

第2题：

第3题：

A network includes a RIPv2 domain, an EIGRP domain, and an OSPF domain. Each pair of routing domains has multiple routers redistributing routes between the p air of domains. The design requires that the redistribution configuration avoid matching based on prefix/length because of the trouble in maintaining such configurations. Which one of the following tools can be used in all three routing domains to attem pt to prevent domain loops?（）

• A、Setting route tags
• B、Setting the default administrative distance differently for internal and external routes
• C、Setting administrative distance differently per route
• D、Setting metrics much higher for all ext ernal routes than for all internal routes

第4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 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.

第5题：

A router is running BGP and receives more than one route for a particular prefix. Assume all the routes for this prefix have the same attributes. Which three path features would be reasons be for the rou ter to ignore some of the routes and not consider them as candidates for the best path?（）

• A、paths from an internal BGP (iBGP) neighbor if the local autonomous system (AS) appears in the AS_PATH
• B、paths for which the NEXT_HOP is inaccess ible
• C、paths from an external BGP (eBGP) neighbor if the local autonomous system (AS) appears in the AS_PATH
• D、paths for which the NEXT_HOP is accessible
• E、paths that are marked as synchronized in the show ip bgp output
• F、paths that are marked as  not synchronized in the show ip bgp output

第6题：

A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782.The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?（）

• A、Router R2 will not form a neighbor relationship with R1.
• B、Router R2 will obtain a full routing table, including a default route, from R1.
• C、R2 will obtain OSPF updates from R1, but will not obtain a default route from R1.
• D、R2 will not have a route for the directly connected serial network, but all other directly connected

第7题：

Which three options are valid ways to filter routes from a BGP peer？（）

• A、filter-list
• B、inbound ACL
• C、route-map
• D、outbound ACL
• E、prefix-list
• F、neighbor 10.0.0.1 deny-map my-map command

第8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 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.

第9题：

第10题：

第11题：

第12题：

第13题：

第14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

第15题：

A router learns about a remote network from EIGRP, OSPF, and a static route. Assuming all routing protocols are using their default administrative distance, which route will the router use to forward data to the remote network（）。

• A、The router will use the static route.
• B、The router will use the OSPF route.
• C、The router will use the EIGRP route.
• D、The router will load balance and use all three routes.

第16题：

A router simultaneously receives all the following routes in various routing updates. Which of thefollowing routes would end up in the routing table？（Choose all that apply.）（）

• A、RIP route 10.1.2.0/24
• B、EIGRP route 10.1.2.0/24
• C、RIP route 10.1.0.0/16
• D、OSPF route 10.1.0.0/16
• E、RIP route 10.0.0.0/16
• F、OSPF route 10.1.2.0/24

第17题：

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

第18题：

Which two options does Cisco PfR use to control the entrance link selection with inbound  optimization？（）

• A、Prepend extra AS hops to the BGP prefix.
• B、Advertise more specific BGP prefixes（longer mask）.
• C、Add（prepend）one or more communities to the prefix that is advertised by BGP.
• D、Have BGP dampen the prefix.

第19题：

A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?（）

• A、the OSPF route
• B、the EIGRP route
• C、the RIPv2 route
• D、all three routes
• E、the OSPF and RIPv2 routes

第20题：

Which two statements are correct regarding default protocol preference values?（）

• A、OSPF internal routes have a lower preference than static routes.
• B、Both direct and local routes have the same preference value.
• C、OSPF's preference value is lower than BGP.
• D、OSPF has a single preference value for both internal and external routes.

第21题：

第22题：

第23题：

第24题：