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CCNA EXAMS: Routering > CCNA Ch 10: DHCP > Flashcards

CCNA Ch 10: DHCP Flashcards

1
Q

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

A

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

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2
Q

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

A

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

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3
Q

A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?

A

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

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4
Q

Type a command to exclude the first fifteen useable IP addresses from a DHCPv4 address pool of the network 10.0.15.0/24.

A

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

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5
Q

What are three [3] things that are required for stateless DHCPv6

A
  1. enabled in RA messages with the ipv6 nd other-config-flag command
  2. clients send only DHCPv6 INFORMATION-REQUEST messages to the server
  3. enabled on the client with the ipv6 address autoconfig command
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6
Q

What are three [3] things that are required for stateless DHCPv6

A
  1. the M flag is set to 1 in RA messages
  2. uses the address command to create a pool of addresses for clients
  3. enabled on the client with the ipv6 address dhcp command
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7
Q

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?

A

The router is configured for stateless DHCPv6 operation.

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8
Q

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?

A

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

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9
Q

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?

A

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

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10
Q

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

A

ICMPv6

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11
Q

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?

A

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

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12
Q

Under which two [2] circumstances would a router usually be configured as a DHCPv4 client?

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

2. This is an ISP requirement.

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13
Q

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

A

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

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14
Q

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?

A

DHCPv6 INFORMATION-REQUEST

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15
Q

An administrator issues the commands:

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

A

configuring the router to obtain IP parameters from a DHCPv4 server

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16
Q

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?

A 
p 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
17
Q

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

A

broadcast DHCPREQUEST

18
Q

How many IP addresses has the DHCP server leased and what is the number of DHCP pools configured?

A

one pool

three leases

19
Q

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?

A

The router is configured for SLAAC DHCPv6 operation

20
Q

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?

A

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

21
Q

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

A

dynamic allocation

22
Q

What is the three [3] orders to configure DHCPv4 server

A
  1. Exclude IP addresses
  2. Configure DHCP Pool
  3. Define the default gateway
23
Q

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?

A

stateless DHCPv6

24
Q

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?​

A

R1(config)# ipv6 unicast-routing

CCNA EXAMS: Routering (11 decks)

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