更多"如果一个OSPF中只有一个area，那么这个area的ID是（）"的相关试题:
[多项选择]The maximum number of routers per OSPF area typically depends on which three factors?（）
A. the kind of OSPF areas being implemented
B. the number of external LSAs in the network
C. the number of DRs and BDRs in the areas
D. the number of virtual links in the areas
E. how well the areas can be summarized
F. the use of LSA filters
[多项选择]To make OSPF area 4 totally stubby, the following command was issued on the ABR in router configuration mode: area 4 stub.Which two things need to be done to finish making area 4 a totally stubby area?（）
A. Apply the area 4 stub command to all routers in the area
B. On the ABR, use the area 4 stub command with the no - summary keyword
C. On the ABR, specify a default cost for the area with the area default - cost command
D. On the ABR, use the default - information originate command to inject a default route into area 4
E. Use the auto - cost command on each router in the area to automatically determine the cost to other OSPF areas
[单项选择]Which OSPF area type allows for the flooding of a Type 7 LSA?（）
A. stub
B. transit
C. border
D. not-so-stubby
[单项选择]Which of the following is true about an OSPF area border router (ABR)?（）
A. The ABR must have multiple interfaces connected to the backbone areA
B. An ABR is a router with two interfaces, each connected to a different nonbackbone areA
C. The only requirement to be considered an ABR is at least one interface connected to the backbone areA
D. An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
[多项选择]What are two benefits of using a single OSPF area network design?（）
A. it reduces the number of required OSPF neighbor adjacencies
B. It reduces the types of LSAs that are generated
C. It is less CPU intensive for routers in the single area
D. It increases LSA response times.
E. It removes the need for virtual links
[单项选择] Router R1 sits inside OSPF area 1. Router R2 redistributes an E1 route into OSPF for prefix 2.2.2.0/24, with external metric 20. Router R22 redistributes an E2 route for the same prefix/length, external metric 10. Under what conditions will R1 choose as it s best route the route through R22?（）
A. R1 will always choose the route through R22.
B. As long as R1's best internal OSPF cost to reach R22 is less than 10.
C. As long as R1's best internal OSPF cost to reach R22 is less than 20.
D. R1 will never choo se the route through R22 if the E1 route through R2 is available.
[单项选择]如果一个IP地址的主机ID全是“1”，那么这个IP表示的是（）。
A. 网络地址
B. 广播地址
C. 回环地址
D. 专用地址
[单项选择]哪一个OSPF命令可以把所有端口划分进area 0？（）
A. network 0.0.0.0 255.255.255.255 area 0
B. network 0.0.0.0 0.0.0.0 area 0
C. network 255.255.255.255 0.0.0.0 area 0
D. network all-interfaces area 0
[单项选择]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
[单项选择]人们认为，如果说在美国只有一个人是行政管理的化身，那么这个人就是（）。
A. 杰佛逊
B. 威尔逊
C. 古利克
D. 潘恩
[单项选择]If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the absence of a loopback interface?（）
A. the IP address of the first Fast Ethernet interface
B. the IP address of the console management interface
C. the highest IP address among its active interfaces
D. the lowest IP address among its active interfaces
E. the priority value until a loopback interface is configured
[简答题]如果用24b储存一个无符号数，这个数的范围是什么？如果储存的是一个补码表示的有符号数，那么这个数的范围又是什么？
[单项选择]You have amulti-area OSPF network and you’re concerned because one of the sites is having connectivity problem to resources in a different area. Which IOS privileged mode command would you enter to confirm that your network ：A.has a path to itsABR，B.has a path to itsASBR，and C.the SPF calculation is functional（）
A. show ip protocols
B. show running-config
C. show ip ospfneighbor
D. show ip ospfborder-routers
[多项选择] Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces (respectively), currently both successfully use OSPF MD5 authentication. The OSPF configuration includes the area 0 authentication command under the router ospf 1 command. Which of the following commands must have been configur ed on R1's Fa0/0 interface?（）
A. ip ospf authentication null
B. ip ospf authentication message - digest
C. ip ospf authentication -key whatever- it - is
D. ip ospf message - digest - key 1 md5 whatever - it - is
E. ip ospf md5 1 key whatever - it - is
[单项选择]什么命令序列将配置一个路由器运行OSPF，并添加网络10.1.1.0/24 area0？（）
A. router ospf area 0 network 10.1.1.0 255.255.255.0 area 0
B. router ospf network 10.1.1.0 0.0.0.255
C. router ospf 1 network 10.1.1.0 0.0.0.255 area 0
D. router ospf area 0 network 10.1.1.0 0.0.0.255 area 0
E. router ospf network 10.1.1.0 255.255.255.0 area 0
F. router ospf 1 network 10.1.1.0 0.0.0.255
[单项选择]如果一个内部网络对外的出口只有一个，那么最好配置（）
A. 缺省路由
B. 主机路由
C. 动态路由
[多项选择]下列关于网络中OSPF的区域（Area）说法正确的是？（）
A. 网络中的一台路由器可能属于多个不同的区域，但是必须有其中一个区域是骨干区域
B. 网络中的一台路由器可能属于多个不同的区域，但是这些区域可能都不是骨干区域
C. 只有在同一个区域的OSPF路由器才能建立邻居和邻接关系
D. 在同一个AS内多个OSPF区域的路由器共享相同的LSDB
