CMS专题
单选题An OSPF non-backbone area allows external routes to be flooded within the area. These externalroutes are propagated into other areas. However, external routes from other areas are not allowed to enter this area. Which type of OSPF area does this descri
题目
stub area
transit area
border area
not-so-stubby area
相似问题和答案
第1题：
Refer to the exhibit and the partial configuration on router R2. On router R4 all RIP routes are redistributed into the OSPF domain. A second redistribu tion is configured on router R2 using a route map. Based on the configuration on router R2, which EIGRP external routes will be present in the routing table of R1?（）
A. the routes originating from the RIP routing domain
B. the routes originating from the OSPF stub area
C. all OSPF inter and intra - area routes
D. all routes originating from RIP and OSPF routing domains
第2题：
A. The map prohibits th e redistribution of all type 2 external OSPF routes.
B. All routes that do no match clauses 10 and 20 of the route map are redistributed with their tags set to 8.
C. The map prohibits the redistribution of all external OSPF routes with tag 6 set.
D. Th e map permits the redistribution of all type 1 external OSPF routes.
E. The map redistributes into EIGRP all routes that match the pfx prefix list and the five metric values?0000, 1000, 255, 1, and 1500.
F. The map prohibits the redistribution of all ty pe 2 external OSPF routes with tag 6 set.
第3题：
An OSPF non-backbone area allows external routes to be flooded within the area. These externalroutes are propagated into other areas. However, external routes from other areas are not allowed to enter this area. Which type of OSPF area does this describe?（）
A. stub area
B. transit area
C. border area
D. not-so-stubby area
第4题：
Neither external routes nor interarea routes will inject into this area. What is the area type and how can you configure it？
正确答案:This should be totally stubby area. In order to configure a totally stubby area，command “area area-ID stub no-summary” on ABR and “area area-ID stub”on internal router in the totally stubby area are used.
第5题：
You are troubleshooting an OSPF problem where external routes are not showing up in the OSPF database. Which two options a re valid checks that should be performed first to verify proper OSPF operation?（）
- A、Are the ASBRs trying to redistribute the external routes into a totally stubby area?
- B、Are the ABRs configured with stubby areas?
- C、Is the subnets keyword being used with the redistribution command?
- D、Is backbone area (area 0) contiguous?
- E、Is the CPU utilization of the routers high?
正确答案:A,C
第6题：
A. Have a backbone area (area 0) with 40 routers and use default routes to reach external destinations
B. Have a backbo ne area (area 0) with 4 routers and 30,000 external routes injected into OSPF
C. Have less OSPF areas to reduce the need for interarea route summarizations
D. Have multiple OSPF processes on each OSPF router. Example, router ospf 1, router ospf 2
第7题：
What are some of the characteristics of the OSPF routing protocol?（）
- A、It confines network instability to a single area of network.
- B、It increases the routing overhead of the network
- C、It supports VLSM
- D、It routes between Autonomous Systems.
- E、It allows extensive control of routing updates
- F、None of the above
正确答案:A,C,E
第8题：
Refer to the exhibit. OSPF is configured on all routers in the network. Area 5 is configured as an NSSA areA. The RIPv2 routes are redistributed into the OSPF domain on router R5. What two types of LSAs will be originated by router R5?（）
A. type 1 Router LSA
B. type 2 Network LSA
C. type 3 Network Summary LSA
D. type 4 ASBR Summary LSA
E. type 5 AS External LSA
F. type 7 NSSA External LSA
第9题：
When an OSPF design is planned, which implementation can help a router not have memory resource issues?（）
- A、Have a backbone area (area 0) with 40 routers and use default routes to reach external destinations
- B、Have a backbo ne area (area 0) with 4 routers and 30,000 external routes injected into OSPF
- C、Have less OSPF areas to reduce the need for interarea route summarizations
- D、Have multiple OSPF processes on each OSPF router. Example, router ospf 1, router ospf 2
正确答案:A
第10题：
Which one of these statements is true of OSPF type 5 LSAs？ （）
- A、 They are used to summarize area routes to other areas.
- B、 They are used in not-so-stubby areas to propagate external routes.
- C、 They are used to notify areas of the ASBR.
- D、 They are flooded to all areas except stub areas （external route）.
正确答案:D