CCNA 3 R&S Scaling Networks Chapter 7 v5.0 Exam Answers 2014

1

Place the options in the following order: 
first 
– not scored – 
third 
second

2

Refer to the exhibit. Which command should be used to configure EIGRP to only advertise the network that is attached to the gigabit Ethernet 0/1 interface?

network 172.16.23.64 0.0.0.63*

network 172.16.23.0 255.255.255.192

network 172.16.23.64 0.0.0.127

network 172.16.23.0 255.255.255.128

3 
What is the purpose of using protocol-dependent modules in EIGRP?

to accommodate routing of different network layer protocols*

to identify different application layer protocols

to describe different routing processes

to use different transport protocols for different packets

4 
Which statement describes a characteristic of the delivery of EIGRP update packets?

EIGRP sends all update packets via unicast.

EIGRP uses a reliable delivery protocol to send all update packets.*

EIGRP uses UDP to send all update packets.

EIGRP sends all update packets via multicast.

5 
A new network administrator has been asked to verify the metrics that are used by EIGRP on a Cisco device. Which two EIGRP metrics are measured by using static values on a Cisco device? (Choose two.)

bandwidth*

MTU

delay*

load

reliability

6 
Which protocol is used by EIGRP to send hello packets?

RTP*

TCP

UDP

IP

7 
Which destination MAC address is used when a multicast EIGRP packet is encapsulated into an Ethernet frame?

01-00-5E-00-00-09

01-00-5E-00-00-10

01-00-5E-00-00-0A*

01-00-5E-00-00-0B

8

Place the options in the following order: 
– not scored – 
EIGRP for IPv4 only 
both EIGRP for IPv4 and EIGRP for IPv6 
EIGRP for IPv6 only

9

Refer to the exhibit. R2 has two possible paths to the 192.168.10.4 network. What would make the alternate route meet the feasibility condition?

a reported distance greater than 41024000

a feasible distance greater than 41024000

an administrative distance less than 170

a reported distance less than 3523840*

10

Refer to the exhibit. Which two networks contain feasible successors? (Choose two.)

192.168.51.0

10.44.101.252

10.44.104.253

10.44.100.252*

192.168.71.0*
11 
If all router Ethernet interfaces in an EIGRP network are configured with the default EIGRP timers, how long will a router wait by default to receive an EIGRP packet from its neighbor before declaring the neighbor unreachable?

10 seconds

15 seconds*

20 seconds

30 seconds

12 
Which command or commands must be entered on a serial interface of a Cisco router to restore the bandwidth to the default value of that specific router interface?

shutdown
no shutdown

bandwidth 1500

copy running-config startup-config
reload

no bandwidth*

13 
Which EIGRP route would have the preferred administrative distance?

a summary route*

an internal route

an external route that is redistributed from RIP

an external route that is redistributed from OSPF

14 
How do EIGRP routers establish and maintain neighbor relationships?

by comparing known routes to information received in updates

by exchanging routing tables with directly attached routers

by dynamically learning new routes from neighbors

by exchanging hello packets with neighboring routers*

by exchanging neighbor tables with directly attached routers

15 
When an EIGRP-enabled router uses a password to accept routes from other EIGRP-enabled routers, which mechanism is used?

EIGRP authentication*

Diffusing Update Algorithm

Reliable Transport Protocol

bounded updates

partial updates

16 
What is indicated when an EIGRP route is in the passive state?

The route has the highest path cost of all routes to that destination network.

The route is a feasible successor and will be used if the active route fails.

The route is viable and can be used to forward traffic.*

There is no activity on the route to that network.

The route must be confirmed by neighboring routers before it is put in the active state.

17 
Which three metric weights are set to zero by default when costs in EIGRP are being calculated? (Choose three.)

k6

k3

k5*

k4*

k2*

k1

18 
Why would a network administrator use a wildcard mask in the network command when configuring a router to use EIGRP?

to send a manual summarization

to exclude some interfaces from the EIGRP process*

to subnet at the time of the configuration

to lower the router overhead

19 
Which table is used by EIGRP to store all routes that are learned from EIGRP neighbors?

the adjacency table

the routing table

the topology table*

the neighbor table

20 
Where are EIGRP successor routes stored?

only in the routing table

in the routing table and the topology table*

only in the neighbor table

in the routing table and the neighbor table

21

Launch PT – Hide and Save PT
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

Which code is displayed on the web server?

Done

Complete*

EIGRP

IPv6EIGRP

22 
Which command is used to display the bandwidth of an interface on an EIGRP-enabled router?

show ip protocols

show interfaces*

show ip interface brief

show ip route

23 
Fill in the blank.
In an EIGRP topology table, a route that is in a/an ” active ” state will cause the Diffusing Update Algorithm to send EIGRP queries that ask other routers for a path to this network.

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CCNA 3 R&S Scaling Networks Chapter 6 v5.0 Exam Answers 2014

1 
The network administrator has been asked to summarize the routes for a new OSPF area. The networks to be summarized are 172.16.8.0, 172.16.10.0, and 172.16.12.0 with subnet masks of 255.255.255.0 for each network. Which command should the administrator use to forward the summary route for area 15 into area 0?

area 15 range 172.16.8.0 255.255.255.248

area 0 range 172.16.8.0 255.255.248.0

area 0 range 172.16.8.0 255.255.255.248

area 15 range 172.16.8.0 255.255.248.0*

2 
Fill in the blank.
The “ backbone ” area interconnects with all other OSPF area types.

3

Place the options in the following order: 
backbone router 
– not scored – 
internal router 
Autonomous System Boundary Router 
Area Border Router

4 
Fill in the blank. Do not use acronyms.
OSPF type 2 LSA messages are only generated by the ”  DR  ” router to advertise routes in multiaccess networks.

5 
What is one advantage of using multiarea OSPF?

It improves the routing efficiency by reducing the routing table and link-state update overhead.*

It enables multiple routing protocols to be running in a large network.

It increases the routing performance by dividing the neighbor table into separate smaller ones.

It allows OSPFv2 and OSPFv3 to be running together.

6 
A network administrator is verifying a multi-area OSPF configuration by checking the routing table on a router in area 1. The administrator notices a route to a network that is connected to a router in area 2. Which code appears in front of this route in the routing table within area 1?

O IA*

O

C

O E2

7

Refer to the exhibit. What can be concluded about network 192.168.4.0 in the R2 routing table?

This network should be used to forward traffic toward external networks.

The network was learned from a router within the same area as R2.*

The network was learned through summary LSAs from an ABR.

The network can be reached through the GigabitEthernet0/0 interface.

8 
An ABR in a multiarea OSPF network receives LSAs from its neighbor that identify the neighbor as an ASBR with learned external networks from the Internet. Which LSA type would the ABR send to other areas to identify the ASBR, so that internal traffic that is destined for the Internet will be sent through the ASBR?

LSA type 1

LSA type 2

LSA type 3

LSA type 4*

LSA type 5

9 
Which three steps in the design and implementation of a multiarea OSPF network are considered planning steps? (Choose three.)

Configure OSPF.

Define the OSPF parameters.*

Troubleshoot the configurations.

Gather the required parameters.*

Define the network requirements.*

Verify OSPF.

10 
Fill in the blank. Use a number.
An ASBR generates type ” 5 ” LSAs for each of its external routes and floods them into the area that it is connected to.

11

Refer to the exhibit. What is indicated by the O IA in the router output?

The route was learned from within the area.

The route was learned from outside the internetwork.

The route was manually configured.

The route was learned from another area.*

12 
Which command can be used to verify the contents of the LSDB in an OSPF area?

show ip route ospf

show ip ospf database*

show ip ospf interface

show ip ospf neighbor

13 
Which statement describes a multiarea OSPF network?

It has a core backbone area with other areas connected to the backbone area.*

It has multiple routers that run multiple routing protocols simultaneously, and each protocol consists of an area.

It consists of multiple network areas that are daisy-chained together.

It requires a three-layer hierarchical network design approach.

14 
Which characteristic describes both ABRs and ASBRs that are implemented in a multiarea OSPF network?

They usually have many local networks attached.

They both run multiple routing protocols simultaneously.

They are required to perform any summarization or redistribution tasks.*

They are required to reload frequently and quickly in order to update the LSDB.

15 
Where can interarea route summarization be performed in an OSPF network?

ABR*

any router

DR

ASBR

16

Refer to the exhibit. Which two statements are correct? (Choose two.)

The entry for 172.16.200.1 represents a loopback interface.

To reach network 172.16.2.0, traffic will travel through the GigabitEthernet0/0 interface.

To reach network 192.168.1.0, traffic will exit via the Serial0/0/0 interface​.*

The routing table contains routes from multiple areas.*

The routing table contains two intra-area routes.

17

Launch PT  Hide and Save PT
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What is preventing users who are connected to router R2 from accessing resources located either within the network 192.168.1.0 or the internet?

The router R2 is not receiving any updates from either router R1 or R3.*

The default route is not redistributed correctly from the router R1 by OSPF.

The OSPF timers that are configured on routers R1, R2, and R3 are not compatible.

The interface that is connected to the ISP is down.

The OSPF network statements are misconfigured on one of the routers.

18 
Which two statements correctly describe OSPF type 3 LSAs? (Choose two.)

Type 3 LSAs are used to update routes between OSPF areas.*

Type 3 LSAs are known as router link entries​.

Type 3 LSAs are used for routes to networks outside the OSPF autonomous system​.

Type 3 LSAs are known as autonomous system external LSA entries.​

Type 3 LSAs are generated without requiring a full SPF calculation.​*

19 
A network administrator is implementing OSPF in a portion of the network and must ensure that only specific routes are advertised via OSPF. Which network statement would configure the OSPF process for networks 192.168.4.0, 192.168.5.0, 192.168.6.0, and 192.168.7.0, now located in the backbone area, and inject them into the OSPF domain?

r1(config-router)# network 192.168.0.0 0.0.0.255 area 1

r1(config-router)# network 192.168.4.0 0.0.255.255 area 0

r1(config-router)# network 192.168.4.0 0.0.15.255 area 1

r1(config-router)# network 192.168.0.0 0.0.3.255 area 0

r1(config-router)# network 192.168.4.0 0.0.3.255 area 0*

r1(config-router)# network 192.168.4.0 0.0.3.255 area 1

20 
Which two networks are part of the summary route 192.168.32.0/22? (Choose two.)

192.168.35.0/24*

192.168.36.0/24

192.168.33.0/24*

192.168.31.0/24

192.168.37.0/24

192.168.38.0/24

21

Refer to the exhibit. Fill in the blank. Do not use abbreviations.
The “network 192.168.10.128 0.0.0.127 area 1” command must be issued to configure R1 for multiarea OSPF.​

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CCNA 3 R&S Scaling Networks Chapter 5 v5.0 Exam Answers 2014

1 
A network administrator has just changed the router ID on a router that is working in an OSPFv2 environment. What should the administrator do to reset the adjacencies and use the new router ID?

Issue the clear ip ospf process privileged mode command.*

Configure the network statements.

Change the OSPFv2 process ID.

Change the interface priority.

2

Refer to the exhibit. What three conclusions can be drawn from the displayed output? (Choose three.)

The DR can be reached through the GigabitEthernet 0/0 interface.*

There have been 9 seconds since the last hello packet sent.*

The router ID on the DR router is 3.3.3.3

The BDR has three neighbors.

The router ID values were not the criteria used to select the DR and the BDR.*

This interface is using the default priority.

3 
When checking a routing table, a network technician notices the following entry:

O*E2 0.0.0.0/0 [110/1] via 192.168.16.3, 00:20:22, Serial0/0/0

What information can be gathered from this output?

This route is a propagated default route.*

The edge of the OSPF area 0 is the interface that is addressed 192.168.16.3.

The route is located two hops away.

The metric for this route is 110.

4 
Which command will a network engineer issue to verify the configured hello and dead timer intervals on a point-to-point WAN link between two routers that are running OSPFv2?

show ipv6 ospf interface serial 0/0/0

show ip ospf neighbor

show ip ospf interface serial 0/0/0*

show ip ospf interface fastethernet 0/1

5 
A network engineer has manually configured the hello interval to 15 seconds on an interface of a router that is running OSPFv2. By default, how will the dead interval on the interface be affected?

The dead interval will not change from the default value.

The dead interval will now be 30 seconds.

The dead interval will now be 15 seconds.

The dead interval will now be 60 seconds.*

6

Refer to the exhibit. An administrator is trying to configure R1 to run OSPFv3 but the neighbor adjacency is not forming with the router connected to Fa0/0. What is the cause of the problem?

FastEthernet0/0 has been configured as a passive interface.

No router ID has been configured.*

A link-local address has not been configured on interface FastEthernet0/0.

The OSPF process ID and area values are backwards in the interface configuration.

7

Refer to the exhibit. A network administrator has configured the OSPF timers to the values that are shown in the graphic. What is the result of having those manually configured timers?

The R1 dead timer expires between hello packets from R2.*

The neighbor adjacency has formed.

R1 automatically adjusts its own timers to match the R2 timers.

The hello timer on R2 expires every ten seconds.
8 
When OSPFv2 neighbors are establishing adjacencies, in which state do they elect a DR and BDR router?

Two-Way state*

Loading state

Init state

Exchange state

9

Refer to the exhibit. R1 and R2 are connected to the same LAN segment and are configured to run OSPFv3. They are not forming a neighbor adjacency. What is the cause of the problem?

The OSPFv3 process IDs of R1 and R2 are different.

The priority value of both R1 and R2 is 1.

The timer intervals of R1 and R2 do not match.*

The IPv6 addresses of R1 and R2 are not in the same subnet.

10

Refer to the exhibit. What kind of OSPF authentication has been configured on this interface?

null

simple

MD5*

plain text

11 
Why is MD5 authentication more secure than simple authentication for OSPF updates?

MD5 does not send the password to the neighbor router.*

MD5 requires passwords that are at least 8 characters long.

MD5 uses both a username and a password to authenticate the neighbor.

MD5 employs IPsec to keep the updates from being intercepted.
12 
Which two pieces of information are used by the OSPF MD5 algorithm to generate a signature? (Choose two.)

OSPF router ID

secret key*

router hostname

interface IP address

OSPF message*

13 
A network engineer is troubleshooting convergence and adjacency issues in an OSPFv2 network and has noted that some expected network route entries are not displayed in the routing table. Which two commands will provide additional information about the state of router adjacencies, timer intervals, and the area ID? (Choose two.)

show running-configuration

show ip ospf neighbor*

show ip ospf interface*

show ip route ospf

show ip protocols

14 
Why do OSPF serial interfaces usually require manual bandwidth configuration?

OSPF uses the bandwidth value to compute routes for its routing table.*

All serial interfaces default to a value of 1.544 Mb/s.

Each side of an OSPF serial link should be configured with a unique value.

Bandwidth value affects the actual speed of the link.

15 
A network engineer is troubleshooting an OSPFv2 network and discovers that two routers connected by a point-to-point WAN serial link are not establishing an adjacency. The OSPF routing process, network commands and area ID are all confirmed as correct, and the interfaces are not passive. Testing shows that the cabling is correct, that the link is up, and pings between the interfaces are successful. What is most likely the problem?

A clock rate has not been set on the DCE interface of the serial link.

The OSPFv2 process IDs on each router do not match.

A DR election has not taken place.

The subnet masks on the two connected serial interfaces do not match.*

16 
A network engineer is troubleshooting OSPFv2 routing issues on two connected routers. Which two requirements to form an adjacency need to be verified? (Choose two.)

Verify that the interfaces that connect the two routers are in the same area.*

Verify that one of the routers is the DR or BDR and the other router a DRother.

Verify that one of the interfaces that connects the two routers is active and the other passive.

Verify that the interfaces that connect the two routers are in the same subnet.*

Verify that both routers are using the same OSPFv2 process ID.

17 
Which command is used to verify that OSPF is enabled and also provides a list of the networks that are being advertised by the network?​

show ip protocols*

show ip ospf interface

show ip interface brief

show ip route ospf

18

Refer to the exhibit. Four routers are connected to an Ethernet LAN segment and are configured to run OSPFv3. However, none of the routers are receiving routing updates. What is the cause of the problem?

The routers are using IPv6 link local addresses to communicate.

The network type has been set to BROADCAST instead of NBMA.

The routers are using IPv4 addresses for router IDs.

All of the routers have an OSPFv3 interface priority of 0.*

19

Refer to the exhibit. These two routers are configured to run OSPFv3 but they are not forming a neighbor adjacency. What is the cause of the problem?

The routers do not have global IPv6 addresses that are configured on the Fa0/0 interfaces.

The routers have both been elected as the DR.

The routers are configured with the same router ID.*

The routers have the same priority.

20 
A network engineer suspects that OSPFv3 routers are not forming neighbor adjacencies because there are interface timer mismatches. Which two commands can be issued on the interface of each OSFPv3 router to resolve all timer mismatches? (Choose two.)

no ipv6 ospf dead-interval*

no ipv6 router ospf 10

ip ospf dead-interval 40

no ipv6 ospf hello-interval*

no ipv6 ospf cost 10

ip ospf hello-interval 10

21

Refer to the exhibit. Fill in the blank. Do not use abbreviations.
The command ” show ipv6 route ” can be issued on router R2 to verify the propagation of a static default route from R1 to R2.

22 
Fill in the blank. Do not use abbreviations.
When IPv4 and OSPFv2 are being used, the command “ show ip ospf neighbor ” is used to verify that a router has formed an adjacency with its neighboring routers.

23

Place the options in the following order:

- not scored -

full state

loading state

ExStart state

24

Place the options in the following order: 
[+] third 
[+] second 
– not scored – 
[+] first 
[+] fourth

[+] Order does not matter within this group.

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