Chapter 10

1.

1 point

A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?

DHCPv6 SOLICIT

DHCPv6 REQUEST

DHCPv6 ADVERTISE

DHCPv6 INFORMATION-REQUEST

2.

1 point

An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured?

SLAAC

stateless DHCPv6

stateful DHCPv6

RA and EUI-64

3.

1 point

Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

unicast DHCPACK

broadcast DHCPACK

unicast DHCPREQUEST

broadcast DHCPREQUEST

4.

1 point

Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.)

The router is intended to be used as a SOHO gateway.

The administrator needs the router to act as a relay agent.

The router is meant to provide IP addresses to the hosts.

This is an ISP requirement.

The router has a fixed IP address.

5.

1 point

Refer to the exhibit. Based on the output that is shown, what kind of IPv6 addressing is being configured?

SLAAC

stateful DHCPv6

stateless DHCPv6

static link-local

6.

1 point

What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?

the MAC address of the IPv6 enabled interface

a randomly generated 64-bit hexadecimal address

an IPv6 address that is provided by a DHCPv6 server

an IPv4 address that is configured on the interface

7.

1 point

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

How many IP addresses has the DHCP server leased and what is the number of DHCP pools configured? (Choose two.)

five leases

three leases

two pools

seven leases

six pools

one pool

8.

1 point

How does an IPv6 client ensure that it has a unique address after it configures its IPv6 address using the SLAAC allocation method?

It sends an ARP message with the IPv6 address as the destination IPv6 address.

It checks with the IPv6 address database that is hosted by the SLAAC server.

It contacts the DHCPv6 server via a special formed ICMPv6 message.

It sends an ICMPv6 Neighbor Solicitation message with the IPv6 address as the target IPv6 address.

9.

1 point

A network administrator is implementing DHCPv6 for the company. The administrator configures a router to send RA messages with M flag as 1 by using the interface command ipv6 nd managed-config-flag. What effect will this configuration have on the operation of the clients?

Clients must use the information that is contained in RA messages.

Clients must use all configuration information that is provided by a DHCPv6 server.

Clients must use the prefix and prefix length that are provided by a DHCPv6 server and generate a random interface ID.

Clients must use the prefix and prefix length that are provided by RA messages and obtain additional information from a DHCPv6 server.

10.

1 point

As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?

DHCPDISCOVER

DHCPOFFER

DHCPREQUEST

DHCPACK

11.

1 point

An administrator issues the commands:

Router(config)# interface g0/1
Router(config-if)# ip address dhcp

What is the administrator trying to achieve?

configuring the router to act as a DHCPv4 server

configuring the router to obtain IP parameters from a DHCPv4 server

configuring the router to act as a relay agent

configuring the router to resolve IP address conflicts

12.

1 point

Which set of commands will configure a router as a DHCP server that will assign IPv4 addresses to the 192.168.100.0/23 LAN while reserving the first 10 and the last addresses for static assignment?

ip dhcp excluded-address 192.168.100.1 192.168.100.10 ip dhcp excluded-address 192.168.100.254 ip dhcp pool LAN-POOL-100 network 192.168.100.0 255.255.255.0 ip default-gateway 192.168.100.1

ip dhcp excluded-address 192.168.100.1 192.168.100.10 ip dhcp excluded-address 192.168.101.254 ip dhcp pool LAN-POOL-100 network 192.168.100.0 255.255.254.0 default-router 192.168.100.1

dhcp pool LAN-POOL-100 ip dhcp excluded-address 192.168.100.1 192.168.100.9 ip dhcp excluded-address 192.168.100.254 network 192.168.100.0 255.255.254.0 default-router 192.168.101.1

ip dhcp excluded-address 192.168.100.1 192.168.100.9 ip dhcp excluded-address 192.168.101.254 ip dhcp pool LAN-POOL-100 ip network 192.168.100.0 255.255.254.0 ip default-gateway 192.168.100.1

13.

1 point

A host on the 10.10.100.0/24 LAN is not being assigned an IPv4 address by an enterprise DHCP server with the address 10.10.200.10/24. What is the best way for the network engineer to resolve this problem?

Issue the command ip helper-address 10.10.200.10 on the router interface that is the 10.10.100.0/24 gateway.

Issue the command default-router 10.10.200.10 at the DHCP configuration prompt on the 10.10.100.0/24 LAN gateway router.

Issue the command ip helper-address 10.10.100.0 on the router interface that is the 10.10.200.0/24 gateway.

Issue the command network 10.10.200.0 255.255.255.0 at the DHCP configuration prompt on the 10.10.100.0/24 LAN gateway router.

14.

1 point

Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?

client IP address

client hardware address

gateway IP address

broadcast MAC address

15.

1 point

What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process?

to notify other DHCP servers on the subnet that the IP address was leased

to notify other hosts not to request the same IP address

for hosts on other subnets to receive the information

for routers to fill their routing tables with this new information

16.

1 point

A network administrator configures a router to send RA messages with M flag as 0 and O flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address?

It should contact a DHCPv6 server for all the information that it needs.

It should use the information that is contained in the RA message exclusively.

It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information.

It should contact a DHCPv6 server for the prefix, the prefix-length information, and an interface ID that is both random and unique.

17.

1 point

Refer to the exhibit. A network administrator is implementing stateful DHCPv6 operation for the company. However, the clients are not using the prefix and prefix-length information that is configured in the DHCP pool. The administrator issues a show ipv6 interface command. What could be the cause of the problem?

No virtual link-local address is configured.

The Duplicate Address Detection feature is disabled.

The router is configured for SLAAC DHCPv6 operation.

The router is configured for stateless DHCPv6 operation.

18.

1 point

Refer to the exhibit. A network administrator is implementing the stateless DHCPv6 operation for the company. Clients are configuring IPv6 addresses as expected. However, the clients are not getting the DNS server address and the domain name information configured in the DHCP pool. What could be the cause of the problem?

The GigabitEthernet interface is not activated.

The router is configured for SLAAC operation.

The DNS server address is not on the same network as the clients are on.

The clients cannot communicate with the DHCPv6 server, evidenced by the number of active clients being 0.

19.

1 point

What is an advantage of configuring a Cisco router as a relay agent?

It will allow DHCPDISCOVER messages to pass without alteration.

It can forward both broadcast and multicast messages on behalf of clients.

It can provide relay services for multiple UDP services.

It reduces the response time from a DHCP server.

20.

1 point

Refer to the exhibit. What should be done to allow PC-A to receive an IPv6 address from the DHCPv6 server?

Add the ipv6 dhcp relay command to interface Fa0/0.

Configure the ipv6 nd managed-config-flag command on interface Fa0/1.

Change the ipv6 nd managed-config-flag command to ipv6 nd other-config-flag.

Add the IPv6 address 2001:DB8:1234:5678::10/64 to the interface configuration of the DHCPv6 server.

21.

1 point

Fill in the blank. Do not abbreviate.
Type a command to exclude the first fifteen useable IP addresses from a DHCPv4 address pool of the network 10.0.15.0/24.
Router(config)# ip dhcp

22.

1 point

A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?

the all-routers multicast address

the link-local address of the router interface that is attached to the network

the unique local address of the router interface that is attached to the network

the global unicast address of the router interface that is attached to the network