[Free] 2018(Aug) Ensurepass Cisco 300-101 Dumps with VCE and PDF 61-70

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Implementing Cisco IP Routing

Question No: 61 – (Topic 5)

What is the benefit of deploying IPv6 in a campus network using dual stack mode?

  1. Dual Stack Mode takes advantage of IPv6 over IPv4 tunnel within a network.

  2. IPv4 and IPv6 run alongside one another and have no dependency on each other to function

  3. IPv4 and IPv6 share network resources.

  4. IPv6 can depend on existing IPv4 routing, QoS, security, and multicast policies.

Answer: B Explanation:

Deploying IPv6 in the campus using the dual-stack model offers several advantages over the hybrid and service block models. The primary advantage of a dual stack model is that it does not require tunneling within the campus network. The dual stack model runs the two protocols as ships in the night, meaning that IPv4 and IPv6 run alongside one another and have no dependency on each other to function except that they share network resources. Both have independent routing.

Question No: 62 – (Topic 5)

Which address is used by the Unicast Reverse Path Forwarding protocol to validate a

packet against the routing table?

  1. source address

  2. destination address

  3. router interface

  4. default gateway

Answer: A

Question No: 63 – (Topic 5)

Which three route filtering statements are true? (Choose three)

  1. After the router rip and passive-interface s0/0 commands have been issued, the s0/0 interface will not send any RIP updates, but will receive routing updates on that interface.

  2. After the router eigrp 10 and passive-interface s0/0 commands have been issued, the s0/0 interface will not send any EIGRP updates, but will receive routing updates on that interface

  3. After the router ospf 10 and passive-interface s0/0 commands have been issued , the s0/0 interface will not send any OSPF updates, but will receive routing updates on that interface

  4. When you use the passive-interface command with RIPv2, multicasts are sent out the specified interface

  5. When you use the passive-interface command with EIGRP, hello messages are not sent out the specified interface

  6. When you use the passive-interface command with OSPF, hello messages are not sent out the specified interface

Answer: A,E,F Explanation:

Passive-interface command is used in all routing protocols to disable sending updates out from a specific interface. However the command behavior varies from o ne protocol to another鈥?/p>

– In RIP, this command will not allow sending multicast updates via a specific interface but will allow listening to incoming updates from other RIP speaking neighbors. This means that the router will still be able to receive updates o n that passive interface and use them in its routing table.

In EIGRP and OSPF the passive-interface command stops sending outgoing hello packets, hence the router can not form any neighbor relationship via the passive interface. This behavior stops both outgoing and incoming routing updates.

Question No: 64 – (Topic 5)

For troubleshooting purposes, which method can you use in combination with the 鈥渄ebug ip packet鈥?command to limit the amount of output data?

  1. You can disable the IP route cache globally.

  2. You can use the KRON scheduler.

  3. You can use an extended access list.

  4. You can use an IOS parser.

  5. You can use the RITE traffic exporter.

Answer: C

Question No: 65 – (Topic 5)

A router is configured for redistribution to advertise EIGRP routes into OSPF on a boundary router. Given the configuration:

router ospf 1

redistribute eigrp 1 metric 25 subnets

What is the function of the 25 parameter in the redistribute command?

  1. It specifies the seed cost to be applied to the redistributed routes.

  2. It specifies the administrative distance on the redistributed routes.

  3. It specifies the metric limit of 25 subnets in each OSPF route advertisement.

  4. It specifies a new process-id to inject the EIGRP routes into OSPF.

Answer: A

Question No: 66 – (Topic 5)

A network administrator recently redistributed RIP routes into an OSPF domain. However, the administrator wants to configure the network so that instead of 32 external type-5 LSAs flooding into the OSPF network, there is only one.

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What must the administrator do to accomplish this?

  1. Configure summarization on R1 with area 1 range 172.16.32.0 255.255.224.0

  2. Configure summarization on R1 with summary-address 172.16.32.0 255.255.224.0

  3. Configure area 1 as a stub area with area 1 stub

  4. Configure area 1 as a NSSA area with area 1 stub nssa

Answer: B Explanation:

In many cases, the router doesn#39;t even need specific routes to each and every subnet (for example, 172.16.1.0/24). It would be just as happy if it knew how to get to the major network (for example, 172.16.0.0/16) and let another router take it from there. In our telephone network example, the local telephone switch should only need to know to route a phone call to the switch for the called area code. Similarly, a router#39;s ability to take a group of subnetworks and summarize them as one network (in other words, one advertisement) is called route summarization. Besides reducing the number of routing entries that a router must keep track of, route summarization can also help protect an external router from making multiple changes to its routing table due to instability within a particular subnet. For example, let#39;s say that we were working on a router that connected to 172.16.2.0/24. As we were working on the router, we rebooted it several times. If we were not summarizing our routes, an external router would see each time 172.16.2.0/24 went away and came back.

Each time, it would have to modify its own routing table. However, if our external router were receiving only a summary route (i.e., 172.16.0.0/16), then it wouldn#39;t have to be concerned with our work on one particular subnet. This is especially a problem for EIGRP, which can create stuck in active (SIA) routes that can lead to a network melt-down.

Summarization Example We have the following networks that we want to advertise as a single summary route: * 172.16.100.0/24 * 172.16.101.0/24 * 172.16.102.0/24 * 172.16.103.0/24 * 172.16.104.0/24 * 172.16.105.0/24 * 172.16.106.0/24

Question No: 67 – (Topic 5)

Which command should be added to RTB under router bgp 100 to allow only the external OSPF routes to be redistributed to RTC?

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  1. redistribute ospf 1

  2. redistribute ospf 1 match external 1

  3. redistribute ospf 1 match external 2

  4. redistribute ospf 1 match external 1 external 2

Answer: D Explanation:

Use the external keyword along with the redistribute command under router bgp to redistribute OSPF external routes into BGP. With the external keyword, you have three choices: 1. redistribute both external type-1 and type-2 (Default) 2. redistribute type-1 3. redistribute type-2 Enter the commands in the configuration mode as described here: RTB(config-router)# router bgp 100 RTB(config-router)# redistribute ospf 1 match external.

Question No: 68 – (Topic 5)

Router E is configured with the EIGRP variance 2 command.

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What path will Router E take to reach Router A?

  1. only E-D-A

  2. only E-B-A

  3. only E-C-A

  4. both E-B-A and E-C-A

  5. both E-B-A and E-D-A

  6. all available paths.

Answer: D Explanation:

By using the 鈥渧ariance 2 command we can share traffic to other feasible successor routes. But by default, EIGRP only shares traffic to 4 paths. So we need to use the 鈥渕aximum- paths 6 to make sure all of these routes are used.

Question No: 69 – (Topic 5)

Which routing protocol will continue to receive and process routing updates from neighbors after the passive interface router configuration command is entered?

  1. EIGRP

  2. RIP

  3. OSPF

  4. IS-IS

Answer: B

Question No: 70 – (Topic 5)

Refer to the exhibit.

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Routers R2, R3, R4, and R5 have OSPF enabled. What should be configured on the routers in area 1 to ensure that all default summary routes and redistributed EIGRP routes will be forwarded from R6 to area 1, and only a default route for all other OSPF routes will be forwarded from R5 to area 1.

  1. R5(config-router)# area 1 stubR6(config-router)# area 1 stub

  2. R5(config-router)# area 1 stub no-summaryR6(config-router)# area 1 stub

  3. R5(config-router)# area 1 nssaR6(config-router)# area 1 nssa

  4. R5(config-router)# area 1 nssa no-summaryR6(config-router)# area 1 nssa

Answer: D Explanation:

External RIP routes are being routed in OSPF area 1 where they are injected as type 7 so we use (area 1 NSSA) command on the ASBR(R2) and

(Area 1 NSSA no-summary) command on R3 and R4.

You can verify issuing the command 鈥渟how ip ospf database鈥?and you will see the type 7 lsa’s on ASBR(R2) and LSA’s Type 5 and 7 on both the ABR routers(R3 ,R4)

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