Rout er R1 directly connects to subnet 10.1.1.0/24 with its Fa0/0 interface. R1 can ping four other working OSPF routers in that subnet. R1 is neither the designated router (DR) nor backup DR (BDR). OSPF is working correctly on all five routers.Which of t

第1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.

第2题：

R1, an ABR between backbone area 0 and area 1, has intra - area routes in area 0 for 10.1.1.0/24,10.1.2.0/24, and 10.1.3.0/24. These routes have metrics of 21, 22, and 23, respectively. An engineer then adds the area 0 r ange 10.1.0.0 255.255.0.0 command under the OSPF process of R1. Which of the following is true?（）

• A、R1 loses and then re - establishes neighborships with all neighbors.
• B、R1 no longer advertises 10.1.1.0/24 to neighbors into area 1.
• C、R1 advertises a 1 0.1.0.0/16 route into area 1 with a metric of 23 (largest metric).
• D、R1 advertises a 10.1.0.0/16 route into area 1 with metric of 21 (lowest metric).

第3题：

R1 is internal to area 1, and R2 is internal to area 2. Subnet 10.1.1.0/24 exists in area 2 as a connected subnet off R2. ABR ABR1 connects area 1 to backbone area 0, and ABR2 c onnects area 0 to area 2. Which of the following LSAs must R1 use when calculating R1's best route for 10.1.1.0/24?（）

• A、R2's Type 1 LSA
• B、Subnet 10.1.1.0/24's Type 2 LSA
• C、ABR1's Type 1 LSA in area 0
• D、Subnet 10.1.1.0/24's Type 3 LSA in Area 0
• E、  Subnet 10.1.1.0/24's Type 3 LSA in Area 1

第4题：

Router R1, an ASBR connected to the Internet and to backbone area 0, has been configured with a default - information originate command. Which of the following is true about the effects of this configuration command?（）

• A、R1 will always create and flood a default route into the OSPF domain.
• B、R1 will create and flood an LSA for prefix/length 0.0. 0.0/0 into the OSPF domain if R1's IP routing table has a route to 0.0.0.0/0.
• C、R1 will set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, regardless of whether R1 has a default route.
• D、R1 w ill set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, but only if R1 has a route to 0.0.0.0/0.

第5题：

Router R1 has been configured with the commands rout er eigrp 9 and network 172.16.2.0 0.0.0.255, with no other current EIGRP configuration. R1's (working) Fa0/0 interface has been configured with IP address 172.16.2.2/26. R1 has found three EIGRP neighbors reachable via interface Fa0/0, including the rou ter with IP address 172.16.2.20. When the engineer attempts to add the neighbor 172.16.2.20 fa0/0 command in EIGRP configuration mode. Which of the following occurs？（）

• A、Fa0/0 fails
• B、The command is rejecteD
• C、The existing three neighbors fail
• D、The neighborship with 172.16.2.20 fails and then reestablishes
• E、None of the other answers is correct

第6题：

Router R1 is three router hops away from subnet 10.1.1.0/24. According to various show interfaces commands, all three links between R1 and 10.1.1.0/24 use the following settings: bandwidth: 1000, 500, 100000 and delay : 12000, 8000, 100. Which of the following answers correctly identifies a value that feeds into the EIGRP metric calculation？（）

• A、Bandwidth of 101,500
• B、Bandwidth of about 34,000
• C、Bandwidth of 500
• D、Delay of 1200
• E、Delay of 2010
• F、Delay of 20100

第7题：

Routers R1 and R2 are EIGRP neighbors using their Fa0/0 interfaces, respectively. An engineer adds the ip hello - interval eigrp 9 6 command to R1's Fa0/0 configuration. Which of the following is true regarding the results from this c hange？（）

• A、The show ip eigrp neighbors command on R1 lists the revised Hello timer
• B、The show ip eigrp interfaces command on R1 lists the revised Hello timer
• C、The R1 - R2 neighborship fails due to Hello timer mismatcH
• D、The show ip eigrp interfaces detail command on R1 lists the revised Hello timer

第8题：

R1 has 5 working interfaces, with EIGRP neighbors existing off each interface. R1 has routes for subnets 10.1.1.0/24, 10.1.2.0/24, and 10.1.3.0/24, with EIGRP integer metrics of roughly 1 million, 2 million, a nd 3 million, respectively. An engineer then adds the ip summary - address eigrp 1 10.1.0.0 255.255.0.0 command to interface Fa0/0. Which of the following is true?（）

• A、R1 loses and then reestablishes neighborships with all neighbors.
• B、R1 no longer advert ises 10.1.1.0/24 to neighbors connected to Fa0/0.
• C、1 advertises a 10.1.0.0/16 route out Fa0/0, with metric of around 3 million (largest metric of component subnets).
• D、R1 advertises a 10.1.0.0/16 route out Fa0/0,with metric of around 2 million (med ian metric of component subnets).

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第13题：

You administer a network that uses two routers， R1 and R2， configured as an HSRP group to  provide redundancy for the gateway. Router R1 is the active router and has been configured as  follows：   R1#configure terminal   R1（config）#interface fa0/0   R1（config-if）#ip address 10.10.0.5 255.255.255.0   R1（config-if）#standby 1 priority 150   R1（config-if）#standby preempt delay minimum 50   R1（config-if）#standby 1 track interface fa0/2 15   R1（config-if）#standby 1 ip 10.10.0.20   Which of the following describes the effect the standby preempt delay minimum 50 command will  have on router R1？（）

• A、 The HSRP priority for router R1 will increase to 200.
• B、 Router R1 will become the standby router if the priority drops below 50.
• C、 The HSRP priority for router R1 will decrease to 50 points when Fa0/2 goes down.  
• D、 Router R1 will wait 50 seconds before attempting to preempt the active router.

第14题：

Refer to the exhibit.HostA cannot ping HostB.Assuming routing is properly configured,what could be the cause of this problem?（）

• A、HostA is not on the same subnet as its default gateway
• B、The address of SwitchA is a subnet address
• C、The Fa0/0 interface on RouterA is on a subnet that cannot be used
• D、The serial interfaces of the routers are not on the same subnet
• E、The Fa0/0 interface on RouterB is using a broadcast address

第15题：

In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?（）

• A、Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch.
• B、A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails.
• C、A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful.
• D、A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.

第16题：

Which of the following answers can be verified as true based on the following command output from Router R1?（） R1#show ip ospf virtual - links Virtual Link OSPF_VL0 to router 4.4.4.4 is up Run as demand circuit DoNotAge LSA alloweD. Transit area 1, via interface FastEthernet0/1, Cost of using 3

• A、R1 is configured with  an area 0 virtual - link 4.4.4.4 cost 3 command.
• B、The ping 4.4.4.4 command on R1 must currently be successful.
• C、R1's Fa0/0 OSPF cost is 3.
• D、4.4.4.4 is known to R1 based on a Type 1 LSA in area 1.

第17题：

The following command output was gathered from Router R1, an ABR between areas 0 (backbone) and area 1. In this internetwork, area 0 contains all the subnets of cla ss A network 10.0.0.0. R1's OSPF process has a distribute - list prefix question in command configured. Assuming the subnets listed in the answers actually exist in area 0. Which of the following occurs on router R1?（） R1#sh ip prefix - list ip prefix - list question: 4 entries seq 5 deny 10.1.2.0/24 ge 25 le 27 seq 15 deny 10.2.0.0/16 ge 30 le 30 seq 20 permit 0.0.0.0/0 le 32

• A、R1 will not create/flood a type 3 LSA for subnet 10.1.2.0/26 into area 1
• B、R1 will not create/flood a Type 3 LSA for subnet 1 0.1.2.0/24 into area 1
• C、R1 will not have an OSPF route for subnet 10.1.2.0/26 in its IP routing tablE
• D、R1 will not have an OSPF route for subnet 10.1.2.0/24 in its IP routing tablE

第18题：

Use the same scenario as the previous question, w ith one changE.Instead of the distribute-list prefix question in command configured on R1,R1's OSPF process has an area 1 filter-list prefix question in commandconfigured. Again assuming that the subnets listed in the answers actually exist in area 0. Which of the following occurs on router R1?（） R1#sh ip prefix - list ip prefix - list question: 4 entries seq 5 deny 10.1.2.0/24 ge 25 le 27 seq 15 deny 10.2.0.0/16 ge 30 le 30 seq 20 permit 0.0.0.0/0 le 32

• A、R1 will not create/flood a type 3 LSA for su bnet 10.1.2.0/26 into area 1
• B、R1 will not create/flood a Type 3 LSA for subnet 10.1.2.0/24 into area 1
• C、R1 will not have an OSPF route for subnet 10.1.2.0/26 in its IP routing tablE
• D、R1 will not have an OSPF route for subnet 10.1.2.0/24 in its  IP routing tablE

第19题：

Rout er R1 directly connects to subnet 10.1.1.0/24 with its Fa0/0 interface. R1 can ping four other working OSPF routers in that subnet. R1 is neither the designated router (DR) nor backup DR (BDR). OSPF is working correctly on all five routers. Which of the following is true on R1?（）

• A、The show ip ospf neighbors command lists two neighbors off Fa0/0.
• B、The show ip ospf neighbors command lists four neighbors off Fa0/0.
• C、The show ip ospf neighbors command lists two neighbors off Fa0/0 in the FULL state.
• D、The show ip ospf neighbors command lists two neighbors off Fa0/0 in the DISCO state.

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