CCNPv7 Tshoot Chapter 6 Answers

7/24/2019 CCNPv7 Tshoot Chapter 6 Answers

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Question 1

1 / 1 pts

Which statement correctly describes the problem when NAT and IPsec implementation coexist in the

network?

NAT changes the encryption keys that are used by IPsec during the key negotiation processes.

Correct!

NAT changes the IP header fields, and those changes can conflict with the integrity of IPsec protocols.

NAT changes the source and destination IP addresses that are encapsulated inside the IPsec packets.

NAT changes the TCP and UDP transport protocols that are embedded in the payload of the IPsec

packets.

Refer to Chapter 6.

Question 2

1 / 1 pts

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Refer to the exhibit. Users on the LAN complained that they cannot access the Internet. Based on the

provided output, what could be the possible cause of the problem?

Too few addresses are assigned to the NAT pool.

The NAT pool is configured with the wrong netmask.

Correct!

An incorrect ACL is referenced during the NAT translation process.

The configurations for the inside and outside interfaces are reversed.

Refer to Chapter 6.


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Question 3

1 / 1 pts

What are two things to be taken into consideration when NAT is configured in the network? (Choose two.)

Correct!

the protocols that are used in the network

Correct!

the port numbers that are used by the applications

the type of interface that is configured for NAT

the scope of the IP addresses that are configured in the NAT pool

the type of ACLs that are filtering the traffic from source to destination

Refer to Chapter 6.

Question 4

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Refer to the exhibit. Users on the LAN complained that they cannot access the resources on the network.

A network administrator issued thedebug ip udpcommand on R2 to verify the DHCP server operation.

On the basis of the provided output, what could be the possible cause of the problem?

Theip dhcp poolcommand is missing from the R2 configuration.

Correct!

Theip helper-addresscommand is missing from the R2 configuration.

Theip dhcp excluded-addressescommand is missing from the R2 configuration.

Thedomain-namecommand is missing from the R3 configuration.

Refer to Chapter 6.

Question 5

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Refer to the exhibit. Users on LAN_1 complained that they cannot communicate with the other users on

the network. A network administrator issuedshow ip dhcp conflictcommand to verify the DHCP server

operation on the router. Based on the provided outputs, what could be done to remedy the problem?

Configure the DHCP pool for a larger scope of IP addresses.

Issue thedhcp servicescommand on router R2.

Issue theip helper-addresscommand under the Fa0/1 interface.

Correct!

Configure the IP addresses that must be excluded from the DHCP pool.


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Refer to Chapter 6.

Question 6

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Refer to the exhibit. Routers R1 and R2 cannot get DHCP addresses from router R3, which is configured

as a DHCP server. After issuing theshow ip socketcommand and troubleshooting the problem, a

network administrator verifies that the R1 and R2 interfaces are up and operational. Based on the

provided output, what could be the possible cause of the problem?

Correct!

The DHCP services are disabled on R3.

The IP helper address is missing from the R3 configuration.


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The IP addresses from the DHCP pool have been exhausted.

Illegal addresses have been assigned to the interfaces of routers R1 and R2.

Refer to Chapter 6.

Question 7

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Refer to the exhibit. Host A is unable to obtain an IP address from the DHCP server. Which procedure

would solve this problem?

You Answered

Configure interface Fa0/0 of router RTA with theip helper-address 10.1.2.1command.

Correct Answer




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Configure interface Fa0/0 of router RTA with theip forward-protocol 67command.

Refer to Chapter 6.

Question 8

0 / 1 pts


Refer to the exhibit. Host A is unable to obtain an IP address from the DHCP server. Which procedure

would solve this problem?

You Answered


Correct Answer



Configure interface Fa0/0 of router RTA with theip forward-protocol 67command.

Refer to Chapter 6.


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Question 9

1 / 1 pts

Refer to the exhibit. Which statement accurately describes the IPv6 routing configuration?

Correct!

The commandipv6 route 5432::/48 null0was entered on the router.

The network 4000::2/128 was learned via a routing protocol.

The commandipv6 route 5000::/64 null0was entered on the router.


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The network 4001::1/128 is unreachable.

Refer to Chapter 6.

Question 10

1 / 1 pts


Refer to the exhibit. R2 is a branch router and accesses all nonlocal networks via R1. The network

administrator is troubleshooting why router R2 cannot access any external networks. Based on the output

of the commands, what is the likely issue?


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The default router for R1 is invalid.

The IPv6 address configured for R1 is invalid.

Correct!

IPv6 unicast routing has not been enabled on R1.

R2 has not been configured for autoconfiguration.

Refer to Chapter 6.

Question 11

1 / 1 pts



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Refer to the exhibit. A network administrator has configured NAT on router R1. However, R1 does not

translate addresses when hosts from the 10.0.0.0 /24 LAN attempt to access the Internet. Which

configuration change would correct this situation?

Append theoverloadkeyword to theip nat inside source list 1 pool NATPOOLcommand.

Change the NAT pool to be in the same subnet as the IP address of s0/0/0.

Change the netmask of the NATPOOL to 255.255.255.224.

Enter theno ip nat inside source static 10.0.0.10 209.165.200.226command.

Correct!


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Make interface Fa0/0 the inside NAT interface and S0/0/0 the outside NAT interface.

Refer to Chapter 6.

Question 12

0 / 1 pts

Which type of DHCP message is sent by a DHCP client to a DHCP server?

DHCP OFFER

You Answered

DHCP ACK

DHCP NACK

Correct Answer

DHCP INFORM

Refer to Chapter 6.

Question 13

1 / 1 pts

What are the three roles a router may assume with respect to DHCP? (Choose three.)

Correct!

server


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forwarder

Correct!

client

remote agent

Correct!

relay agent

supplicant

Refer to Chapter 6.

Question 14

1 / 1 pts

Which three UDP ports are associated with messages that are forwarded by default by a DHCP relay

agent? (Choose three.)

Correct!

37

51

Correct!


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53

59

Correct!

69

80

Refer to Chapter 6.

Question 15

1 / 1 pts



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Refer to the exhibit. A network technician is having issues setting up router R4 in a IPv6 network. What

problem is indicated from the router output?

Correct!

IPv6 routing needs to be enabled.

The interface also requires an IPv4 address.

A routing protocol for IPv6 must be enabled.


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IPv4 routes should be redistributed into IPv6.

Refer to Chapter 6.

Question 16

0 / 1 pts


Refer to the exhibit. A network technician is attempting to get the Internet connection operational. The

technician gathers the information from thedebugcommand on the border router while attempting a pingfrom Computer1 to the ISP. After a conversation with the ISP, it is determined that the ISP router lacks the

appropriate route to the customer. What route should be added to the ISP router?

ip route 0.0.0.0 0.0.0.0 Serial 0/3/0


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ip route 10.10.10.0 255.255.255.252 Serial 0/3/0

Correct Answer

ip route 72.163.4.160 255.255.255.248 10.10.10.2

You Answered

ip route 192.168.254.0 255.255.255.0 10.10.10.2

Refer to Chapter 6.

Question 17

1 / 1 pts


Refer to the exhibit. A network technician is adding the host PC5 to the local LAN. After the host is

connected to an operational port on SwA2, which is in the correct VLAN, the host cannot connect to the

Internet. All other hosts can reach the Internet. Based on the provided output, what is the problem?


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The DHCP server service is disabled.

The addresses in the DHCP pool are in the wrong subnet.

Correct!

The available addresses in the DHCP pool are exhausted.

There is no default router defined in the DHCP pool.

Refer to Chapter 6.

Question 18

1 / 1 pts



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Refer to the exhibit. A network administrator has implemented Network Address Translation (NAT) on

router R1. However, hosts on the inside LAN cannot connect to addresses outside of the corporate

network. Which option correctly identifies the problem?

Interface Fa0/0 should be configured as the outside NAT interface and S0/0/0 as the inside NAT interface.

NAT cannot use named access control lists.

Correct!

The ACL is referring to the wrong internal network.

The NAT-POOL should have included the S0/0/0 interface IP address.


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Theoverloadkeyword has not been appended to theip nat inside sourcecommand.

The static NAT entry IP address is not included in the NAT-POOL.

Refer to Chapter 6.

Question 19

0 / 1 pts

Which IP address should an administrator who is configuring NAT advertise to the outside world?

inside local

Correct Answer

inside global

outside local

You Answered

outside global

Refer to Chapter 6.

Question 20

0 / 1 pts


The network administrator changed the DHCP address pool from 10.10.0.0/16 to 10.20.0.0/16 and is now

receiving complaints from users that they are unable to connect to the Internet. The administrator issues

the commandshow ip nat translationson the border router and observes that there are no active


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translations present. The administrator then verifies that connectivity to the Internet from the border router

is present. What should the administrator do next?

Increase the size of the existing NAT pool.

You Answered

Create a new NAT pool using the 10.20.0.0/16 address space.

Change from dynamic to static NAT for all outbound connections.

Correct Answer

Verify that the ACL is selecting the correct addresses for translation.

Refer to Chapter 6.

Question 21

1 / 1 pts


Refer to the exhibit. A network administrator created a static NAT translation. The purpose of the

translation is to allow outside users to use the IP address 209.165.201.1 to connect to a server that islocated on the internal network at IP address 172.16.6.3. However, users are unable to connect to the

server by using the supplied address. What is the most probable cause of the problem?

There is no outside global address specified.


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The 172.16.0.0/16 network has not been advertised to the outside world.

Dynamic NAT must be used to allow an outside user to connect to the server.

Correct!

The network administrator reversed the addresses in the mapping command.

No access list has been configured to select the traffic that is allowed to connect to the server.

Refer to Chapter 6.

Question 22

1 / 1 pts



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Refer to the exhibit. A network administrator has configured a static NAT entry on router R1 for the internal

web server. However, external users still cannot connect to the web server. Which procedure would

resolve this problem?

Delete the current static entry and issue theip nat outside source static 10.0.0.10

209.165.200.226command.

Correct!

Delete the current static entry and issue theip nat inside source static 10.1.1.10

209.165.200.226command.

For security reasons, an outside address cannot be mapped to an internal private address and therefore

the web server should be configured with a valid public address.

Remove theoverloadkeyword from theip nat inside source listcommand.

Refer to Chapter 6.

Question 23

1 / 1 pts

A network administrator is troubleshooting an EIGRP authentication problem. This is an example of

troubleshooting which functional plane?

Correct!

Control Plane

Data Plane

EIGRP Plane


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Management Plane

Routing Protocol Plane

Refer to Chapter 6.

Question 24

1 / 1 pts


Refer to the exhibit. A user has a PC that connects to a VoIP phone and the phone connects to port Fa0/1

on the switch. The user is complaining about not being able to access the network. The user cannot

access any local print servers and cannot ping any neighboring devices. The administrator attempts to

ping the PC of the user but is unsuccessful. Based on the output of theshow port-securitycommand,

what could be the issue?

The switch port has not been able to detect any devices connected to it.

Correct!

The switch port detected more than one MAC address.


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The switch port detected a bridging loop.

The switch port detected a MAC address that belongs to a different VLAN.

Refer to Chapter 7.

Question 25

1 / 1 pts


Refer to the exhibit. Company A is deploying IP telephony in their offices. A network technician unplugs

the patch cable that currently connects to the PC from the wall jack and then plugs the cable into the port

labeled as 10/100 PC on the IP phone. The technician next uses another patch cable to connect the

switch port on the IP phone to the wall jack. After completing these changes, the technician notices thatthe IP phone cannot initialize and that the PC loses connectivity. The technician then checks the

configuration on the switch. According to the output of theshow running-configcommand, what should

the technician do next in order to find the cause of the problem?

Switch the two patch cables that connect to the IP phone.


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Make sure that the voice VLAN 700 is allowed on the trunking port.

Make sure that the ports for Skinny and TFTP are not blocked by ACLs.

Correct!

Make sure that the port security setting allows more than one MAC address.

CCNPv7 Tshoot Chapter 6 Answers

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