An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?() A. Interfaces will automatically detect and build adjacencies with neighbor routersB. DR and BDR elections will not occurC. DR and BDR elections will occurD. The neighbor command is required to build adjacenciesE. All routers must be configured in a fully meshed topology with all other routers
An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?()
A. Interfaces will automatically detect and build adjacencies with neighbor routers
B. DR and BDR elections will not occur
C. DR and BDR elections will occur
D. The neighbor command is required to build adjacencies
E. All routers must be configured in a fully meshed topology with all other routers
相关考题：
Router R1 has a connected route for 10.1.1.0/24 off interface Fa0/0. Interface Fa0/0 has been enabled for OSPF due to a router ospf 1 and network 10.0.0.0 0.0.0.255 area 0 command. R1 also has EIGRP configured, with the redistribute ospf 1 metric 1000 100 10 1 1500 command configured under EIGRP.Which one of the following is true?（）A. R1 will not redistribute 10.1.1.0/24 into EIGRP, because R1 knows it as a connected route and not as an OSPF route.B. For any OS PF routes redistributed into EIGRP, the metric components includea value equivalent to 1 Mbps of bandwidth.C. For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 100 microseconds of delay.D. No subnets of network 10.0.0.0 will be redistributed due to the omission of the subnets parameter.
Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface.What command would make this router not use a DR, and dynamically discover OSPF neighbors?（）A. ip ospf network broadcastB. ip ospf network non - broadcastC. ip ospf network point - to - multipointD. ip ospf network point - to - multipoint non - broadcast
Which of the following can either directly or indirec tly identify all the interfaces for which both 1) OSPF has been enabled and 2) OSPF is not passive?() A. show ip ospf databaseB. show ip ospf interface briefC. show ip protocolsD. show ip route ospfE. show ip ospf neighbors
Refer to the exhibit. A network administrator has configured DHCP services on the router asshown. DHCP clients connected to the FastEthernet0/0 interface are working properly. DHCP clients connected to the FastEthernet0/1 interface are not receiving addresses.Which two statements contain recommendations that will solve the problem?（）A.The network shown in the output under the ip dhcp pool Central command should be changed to network 10.10.0.0 with a mask of 255.255.255.0B.A second DHCP pool for network 10 .10.0.0/24 should be configuredC.An ip dhcp excluded - address global configuration command for network 10.10.0.0/24 should be issuedD.The ip helper -address 10.0.0.1 command should be issued so that the address can be added to the Fast Ethernet0/0 c onfigurationE.The ip helper -address 10.0.0.1 command should be issued so that the address can be added to the Fast Ethernet0/1 configuration
Refer to the exhibit. Two routers are connected by Frame Relay and are running OSPF bet ween them. Each router has been configured with the appropriate network statements under router ospf 1, but the routers are not forming an adjacency. Which of the following three commands could be configured on each router to correct this problem?（）A. RouterC(config - if)#ip ospf network broadcast RouterD(config - if)#ip ospf network broadcastB. RouterC(config - if)#ip ospf network point - to - point RouterD(config - if)#ip ospf network point - to - pointC. RouterC(config - router)#neighbor 10.100. 100.4 RouterD(config - router)#neighbor 10.100.100.3D. RouterC(config - router)#neighbor 10.255.255.254 RouterD(config - router)#neighbor 10.255.255.253
Refer to the exhibit. Looking at the topology diagram and the partial router configurations shown, which statement is true? () A.The NProuter has two OSPF neighbors in the Full adjacency stateB.The NProuter serial0/0 interface has the OSPF dead timer set to 10 secondsC.The NProuter serial0/0 interface has been configured with an OSPF network type of pointtopointD.The 10.1.1.1 and 10.1.1.2 routers are not using the default OSPF dead and hello timers settingE.The Mismatched error is caus ed by the expiration of the OSPF timers
Route redistribution (RR) has become an integral part of IP network design as the res ult of a growing need for disseminating certain routes across routing protocol boundaries. By default, which description is true when redistributing routes from other routing protocols into OSPF?（）A. Summarized routes are unacceptableB. They will appe ar in the OSPF routing table as type E2 routesC. Only routes with lower administrative distances will be importedD. All imported routes are to be automatically summarized if possible
Refer to the exhibit. What two statements are true?() A. This is the designated router (DR) on the FastEthernet 0/0 link.B. The output was generated by the show ip interface c ommand.C. The router was configured with the commands:r outer ospf 1 network 172.16.6.0 0.0.0.255 area 1D. The IP address of the backup designated router (BDR) is FE80::205:5FFF:FED3:5808.E. Interface FastEthernet 0/0 was configured with the ipv6 o spf 1 area 1 command.F. OSPF version 2 has been enabled to support IPv6.
Users on the 172.17.22.0 network cannot reach the server located on the 172.31.5.0 network.The network administrator connected to console port,issued the show ip route command,and was able to ping the server.Based on the output of the show ip route command topology shown in the graphic,what is the cause of the failure?（）A.IP routing is not enabledB.A static route is configured incorrectlyC.The network has not fully convergedD.The FastEthernet interface on Coffee is disabledE.The routing table on Coffee has not updatedF.The neighbor relationship table is not correctly updated
Router R1 has a connected route for 10.1.1.0/24 off interface Fa0/0. Interface Fa0/0 has been enabled for OSPF due to a router ospf 1 and network 10.0.0.0 0.0.0.255 area 0 command. R1 also has EIGRP configured, with the redistribute ospf 1 metric 1000 100 10 1 1500 command configured under EIGRP. Which one of the following is true?（）A、R1 will not redistribute 10.1.1.0/24 into EIGRP, because R1 knows it as a connected route and not as an OSPF route.B、For any OS PF routes redistributed into EIGRP, the metric components includea value equivalent to 1 Mbps of bandwidth.C、For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 100 microseconds of delay.D、No subnets of network 10.0.0.0 will be redistributed due to the omission of the subnets parameter.
When the Cisco IOS OSPF command ip ospf dead-interval minimal hello-multiplier 5 is configured， which two statements are true？ （）A、OSPF hello interval is 5 secondsB、OSPF hello interval is 1 secondC、OSPF dead interval is 1 secondD、OSPF dead interval is 5 secondsE、OSPF dead interval is 20 secondsF、OSPF hello interval is 0.2 second
A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration.B、For the two vlans to communicate， a network statement for each subinterface needs to be added to the OSPF configuration.C、Direct inter-vlan communication does not require OSPFD、OSPF cannot be used if router-on-a-stick is configured on the router
You have a multi-area OSPF network and you’re concerned because one of the sites is havingconnectivity problem to resources in a different area. Which IOS privileged mode command wouldyou enter to confirm that your network： （A） has a path to its ABR， （B） has a path to its ASBR， and （C）the SPF calculation is functional？（）A、show ip protocolsB、show running-configC、show ip ospf neighborD、show ip ospf border-routers
Which statement about the ip classless router command is true?（）A、The ip classless command is enabled by default in recent versions of IOS.B、The ip classless command should only be enabled when static routing is being used instead of a routing protocol.C、The ip classless command should be enabled by the network administrator whenever RIPv1 or IGRP is being used.D、The ip classless command should be enabled by the network administrator whenever OSPF, RIPv2, or EIGRP is being used.
A network planning diagram shows a large internetwork with many routers. The configurations show that OSPF has been enabled on all interfaces, I P addresses correctly configured, and OSPF workinG. For which of the following cases would you expect a router to create and flood a Type 2 LSA?（）A、When OSPF is enabled on a LAN interface, and the router is the only router connected to the subnet.B、 When OSPF is enabled on a point - to -point serial link, and that router has both the higher router ID and higher interface IP address on the link.C、When OSPF is enabled on a Frame Relay point - to - point subinterface, has the lower RID and lower subinterfa ce IP address, and otherwise uses default OSPF configuration on the interface.D、When OSPF is enabled on a working LAN interface on a router, and the router has been elected BDR.E、None of the other answers is correct.
Which statement is true about the command ipv6 ospf 1 area 0?（）A、It must be issued before the network command to enable the OSPF pr ocess for IPv6.B、It must be issued after the network command to enable the OSPF process for IPv6.C、It must be issued in router global configuration mode to enable the OSPF process for IPv6.D、It must be issued in interface configuration mode to ena ble the OSPF process for IPv6.
Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface. What command would make this router not use a DR, and dynamically discover OSPF neighbors?（）A、ip ospf network broadcastB、ip ospf network non - broadcastC、ip ospf network point - to - multipointD、ip ospf network point - to - multipoint non - broadcast
An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?（）A、Interfaces will automatically detect and build adjacencies with neighbor routersB、DR and BDR elections will not occurC、DR and BDR elections will occurD、The neighbor command is required to build adjacenciesE、All routers must be configured in a fully meshed topology with all other routers
Route redistribution (RR) has become an integral part of IP network design as the res ult of a growing need for disseminating certain routes across routing protocol boundaries. By default, which description is true when redistributing routes from other routing protocols into OSPF?（）A、Summarized routes are unacceptableB、They will appe ar in the OSPF routing table as type E2 routesC、Only routes with lower administrative distances will be importedD、All imported routes are to be automatically summarized if possible
Which statement is true when ICMP echo and echo-reply are disabled on edge devices？（）A、Pings are allowed only to specific devices.B、CDP information is not exchanged.C、Port scans can no longer be run.D、Some network diagnostic data is lost.E、Wireless devices need to be physically connected to the edge device.F、OSPF routing needs the command ip ospf network non-broadcast enabled.
Which of the following can either directly or indirec tly identify all the interfaces for which both 1) OSPF has been enabled and 2) OSPF is not passive?（）A、show ip ospf databaseB、show ip ospf interface briefC、show ip protocolsD、show ip route ospfE、show ip ospf neighbors
多选题Which of the following can either directly or indirec tly identify all the interfaces for which both 1) OSPF has been enabled and 2) OSPF is not passive?（）Ashow ip ospf databaseBshow ip ospf interface briefCshow ip protocolsDshow ip route ospfEshow ip ospf neighbors
单选题Which statement is true about the command ipv6 ospf 1 area 0?（）AIt must be issued before the network command to enable the OSPF pr ocess for IPv6.BIt must be issued after the network command to enable the OSPF process for IPv6.CIt must be issued in router global configuration mode to enable the OSPF process for IPv6.DIt must be issued in interface configuration mode to ena ble the OSPF process for IPv6.
单选题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（）Ashow ip protocolsBshow running-configCshow ip ospfneighborDshow ip ospfborder-routers
单选题Which statement about the ip classless router command is true?（）AThe ip classless command is enabled by default in recent versions of IOS.BThe ip classless command should only be enabled when static routing is being used instead of a routing protocol.CThe ip classless command should be enabled by the network administrator whenever RIPv1 or IGRP is being used.DThe ip classless command should be enabled by the network administrator whenever OSPF, RIPv2, or EIGRP is being used.
单选题A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）AFor the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration.BFor the two vlans to communicate， a network statement for each subinterface needs to be added to the OSPF configuration.CDirect inter-vlan communication does not require OSPFDOSPF cannot be used if router-on-a-stick is configured on the router
单选题Which command displays the number of times that the OSPF Shortest Path First (SPF) algorithm has been executed?（）Ashow ip protocolBshow ip ospfCsho w ip ospf databaseDshow ip ospf interface