A  co-worker is developing an implementation plan for a design that uses OSPF 2 and RIPv2 routing domains, with two routers redistributing between the two domains.The co- worker asks your help in  choosing how to prevent domain loops by setting administrative distance.
Assuming all other related settings use defaults, which of the following would solve the domain loop problem?（）

单项选择题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

单项选择题Which of the following is not true regarding IOS default settings for administrative distance?（）

单项选择题Router R1 is redistributing between two OSPF processes. Given the configuration shown, which includes all commands in the route map named fred, which of the following answers is true regarding the redistribution into OSPF process 1?（） router ospf 1 redistribute ospf 2 external 2 route - map fred ! route - map fred permit 10 match ip address 1 set metric - type type - 1

A. No routes are redistributed because a route cannot be both E1 and E2.
B. Only OSPF E2 routes in the OSPF 2 domain will be considered for redistribution.
C. Inside the OSPF 2 domain, any formerly E2 routes will become E1 routes.
D. Routes permitted by ACL 1 will be redistributed, regardless of whether the routes are E1 or E2 routes.

多项选择题On Router R1, process EIGRP 1 is redistributing routes from process OSPF 2, calling route - map fred with the redistribute ospf 2 command. R1 has learned intra - area routes for 10.1.1.0 24 and 10.1.2.0 24 in part due to the Type 2 LSAs known for each subnet. The route map filters route 10.1.1.0 24 and allows 10.1.2.0 24 througH. Which of the following co mmands on router R1 list subnet 10.1.1.0 24?（）

A. show ip route
B. show ip eigrp topology
C. show ip ospf topology
D. show ip eigrp topology 10.1.1.0/24

单项选择题Router R1 refers to route - map fred when redistributing from EIGRP into OSPF. The entire route - map is listed next. Which of the following answers must be true based on the configuration as shown?（） route - map fred deny 10 match ip address one route - map fred deny 20 match ip address two route - map fred permit 100

A. The third route map clause will allow any routes not already filtered by the first two clauses
B. R outes permitted by ACL "two" will be redistributed
C. Routes denied by ACL "one" will be redistributed
D. All routes will be filtereD