Chapter 8

It can provide relay services for multiple UDP services

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

Exclude IP addresses

What is the first step of configuring a router as a DHCPv4 server?

Configure a DHCP pool

What is the second step of configuring a router as DHCPv4 server?

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

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?

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

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

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

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

The router is configured for stateless DHCPv6 operation

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?

The router is configured for SLAAC operation

A network administrator is implementing the stateless DHCPv6 operation for the company. Clients are configuring IPv6 address 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?

configuring the router to obtain IP parameters from a DHCPv4 server

An administrator issues the commands: interface g0/1 ip address dhcp What is the administrator trying to achieve?

a stateless DHCPv6

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?

DHCPREQUEST

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

stateless DHCPv6

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

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

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

- the M flag is set to 1 in RA messages - uses the address command to create a pool of addresses for clients - enabled on the client with the ipv6 address dhcp command

Matching: Stateful DHCPv6

-enabled in RA messages with the ipv6 nd other-config-flag command -clients send only DHCPv6 INFORMATION-REQUEST messages to the server -enabled on the client with the ipv6 address autoconfig command

Matching: StatelessDHCPv6

ip dhcp excluded-address 10.0.15.1

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

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

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

network address transaltion

What does NAT stand for?

port address translation

What does PAT stand for?

Define the default gateway router

What is the second step of configuring a router as DHCPv4 server?

the MAC address of the IPv6 enabled interface

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

Add the ipv6 dhcp relay command to interface fa0/0

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

EUI-64, random generation

What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC?

broadcast DHCPREQUEST

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

client hardware address

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

dynamic allocation

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