2-10: DHCP

Question 1

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?

Answer 1

The router is configured for stateless DHCPv6 operation.

Question 2

Is statless or statful DHCPv6 enabled in RA messages with the ipv6 nd other-config-flag command?

Answer 2

Statless DHCPv6

Question 2

Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host?

Answer 2

ICMPv6

Question 2

What is the third step in configuring a DHCPv4 Server on a router?

Answer 2

Define the default gateway router

Question 3

Under which two circumstances would a router usually be configured as a DHCPv4 client?

Answer 3

1. The router is intended to be used as a SOHO gateway.
2. This is an ISP requirement.

Question 4

What is the second step in configuring a DHCPv4 Server on a router?

Answer 4

Configure a DHCP pool

Question 5

In statless or statful DHCPv6 is the M flag is set to 1 in RA messages?

Answer 5

Stateful DHCPv6

Question 6

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

Answer 6

broadcast DHCPREQUEST

Question 6

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?

Answer 6

stateless DHCPv6

Question 6

The four steps in obtaining a lease are?

Answer 6

1. DHCPDISCOVER
2. DHCPOFFER
3. DHCPREQUEST
4. DHCPACK (if success)
5. DHCPDECLINE (if failure)

Question 7

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

Answer 7

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

Question 7

The DHCPv6 REPLY packet is what type? (broadcast, multicast, unicast)

Answer 7

Unicast

Question 8

The DHCPv6 ADVERTISE packet is what type? (broadcast, multicast, unicast)

Answer 8

Unicast

Question 9

A company uses the method SLAAC to configure IPv6 addresses for the workstations of the employees. A network administrator configured the IPv6 address on the LAN interface of the router. The interface status is UP. However, the workstations on the LAN segment did not obtain the correct prefix and prefix length. What else should be configured on the router that is attached to the LAN segment for the workstations to obtain the information?​

Answer 9

R1(config)# ipv6 unicast-routing

Question 11

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

Answer 11

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

Question 12

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

Answer 12

stateless DHCPv6

Question 13

If the managed flag is set to 1 and the other flag is set to 0, what IPv6 dynamic addressing mode is used?

Answer 13

DHCPv6 Only

Question 15

When a workstation boots, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?

Answer 15

FF-FF-FF-FF-FF-FF and 255.255.255.255

Question 15

True / False: Automatic Allocation is permanent and has no lease?

Answer 15

True

Question 17

Do statless or statful DHCPv6 clients send only DHCPv6 INFORMATION-REQUEST messages to the server?

Answer 17

Statless DHCPv6

Question 18

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?

Answer 18

DHCPv6 INFORMATION-REQUEST

Question 18

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?

Answer 18

The router is configured for SLAAC DHCPv6 operation.

Question 19

Does statless or statful DHCPv6 use the address command to create a pool of addresses for clients?

Answer 19

Stateful DHCPv6

Question 20

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?

Answer 20

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

Question 22

If the managed flag is set to 0 and the other flag is set to 1, what IPv6 dynamic addressing mode is used?

Answer 22

SLAAC + DHCPv6

Question 23

The DHCPv6 REQUREST packet is what type? (broadcast, multicast, unicast)

Answer 23

Unicast

Question 24

Is statless or statful DHCPv6 enabled on the client with the ipv6 address dhcp command?

Answer 24

Stateful DHCPv6

Question 25

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

Answer 25

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

Question 27

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?

Answer 27

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

Question 28

If the managed and other flags are both set to 0, what IPv6 dynamic addressing mode is used?

Answer 28

SLAAC

Question 30

What command twould exclude the first fifteen useable IP addresses from a DHCPv4 address pool of the network 10.0.15.0/24?

Answer 30

`Router(config)# ip dhcp excluded-address 10.0.15.1 10.0.15.15`

Question 31

The configuration of the DHCP server has been confirmed as correct and the clients have network connectivity to other networks if a static IP address is configured on each one. What step should the engineer take next to solve the issue?

Answer 31

Confirm that ports on the Layer 2 LAN switch are configured as edge ports.

Question 32

A network engineer is troubleshooting hosts on a LAN that are not being assigned an IPv4 address from a DHCP server after a new Ethernet switch has been installed on the LAN. The configuration of the DHCP server has been confirmed as correct and the clients have network connectivity to other networks if a static IP address is configured on each one. What step should the engineer take next to solve the issue?

Answer 32

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

Question 33

What is the first step in configuring a DHCPv4 Server on a router?

Answer 33

Exclude IP Address

Question 34

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?

Answer 34

`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 ************************`

Question 36

What are the three allocation medthods for IP addressing information?

Answer 36

1. Manual Allocation 2. Automatic Allocation 3. Dynamic Allocation

Question 37

An administrator issues the commands: `Router(config)# interface g0/1` `Router(config-if)# ip address dhcp` What is the administrator trying to achieve?

Answer 37

configuring the router to obtain IP parameters from a DHCPv4 server

Question 38

Is statless or statful DHCPv6 enabled on the client with the ipv6 address autoconfig command?

Answer 38

Statless DHCPv6

Question 39

The DHCPv6 SOLICIT packet is what type? (broadcast, multicast, unicast)

Answer 39

Multicast

Question 40

Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?

Answer 40

dynamic allocation

Question 41

What command would produce this output?

Answer 41

show ip dhcp binding

Question 42

What command would produce this output?

Answer 42

show ip dhcp server statistics

Question 43

What command would produce this output?

Answer 43

show ipv6 interface