Chapter 8 Quiz

What is the destination IP address when an IPv4 host sends a DHCPDISCOVER message? 255.255.255.255 224.0.0.1 0.0.0.0 192.168.1.1

255.255.255.255

What process is used in ICMPv6 for a host to verify that an IPv6 address is unique before configuring it on an interface? DAD SLAAC EUI-64 ARP

DAD 8.2.1

Step 4

DHCPACK

Match the DHCP message types to the order of the DHCPv4 process. (Not all options are used.) Step 1

DHCPDISCOVER

Step 2

DHCPOFFER

Step 3

DHCPREQUEST

Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server? DHCPACK DHCPDISCOVER DHCPOFFER DHCPREQUEST

DHCPREQUEST 8.1.1

Which destination IP address is used when an IPv6 host sends a DHCPv6 SOLICIT message to locate a DHCPv6 server? FF02::1:2 FF02::1 FE80::1 FF02::2

FF02::1:2 8.2.1

What is the most likely scenario in which the WAN interface of a router would be configured as a DHCP client to be assigned a dynamic IP address from an ISP? There is a web server for public access on the LAN that is attached to the router. The router is also the gateway for a LAN. It is a SOHO or home broadband router. The router is configured as a DHCP server.

It is a SOHO or home broadband router. 8.1.3

Which command will allow a network administrator to check the IP address that is assigned to a particular MAC address? Router# show ip dhcp binding Router# show ip dhcp pool Router# show ip dhcp server statistics Router# show running-config I section_dhcp

Router# show ip dhcp binding 8.1.2

In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to hosts? ARP EUI-64 ICMPv6 SLAAC

SLAAC 8.2.1

Which command should be configured on a router interface to set the router as a stateful DHCPv6 client? ipv6 enable ipv6 address dhcp ipv6 address autoconfigure ipv6 dhcp server stateful

ipv6 address dhcp 8.2.3

When a client is requesting an initial address lease from a DHCP server, why is the DHCPREQUEST message sent as a broadcast? The client does not yet know the IP address of the DHCP server that sent the offer. The DHCP server may be on a different subnet, so the request must be sent as a broadcast. The client does not have a MAC address assigned yet, so it cannot send a unicast message at Layer 2. The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers.

The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers. 8.1.1

After booting, a client receives an ICMPv6 RA message with the M flag set to 0 and the O flag set to 1. What does this indicate? The client should request an IPv6 address directly from a DHCPv6 server. The client should automatically configure an IPv6 address without contacting a DHCPv6 server. The client should automatically configure an IPv6 address and then contact a DHCPv6 server for more information. The client should be statically configured with an IPv6 address because the local router does not support autoconfiguration.

The client should automatically configure an IPv6 address and then contact a DHCPv6 server for more information. 8.2.1

An administrator has configured a DHCPv4 relay router and issued these commands: Router(config)# interface g0/0 Router(config-if)# ip address 10.0.1.1 255.255.255.0 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# ip dhcp pool RELAY Router(dhcp-config)# end The clients are not receiving IP parameters from the DHCPv4 server. What is a possible cause? The pool cannot be named 'RELAY'. The router is configured as a DHCPv4 client. The IP address is incorrect for the subnet mask that is used. The ip helper-address command is missing.

The ip helper-address command is missing. 8.1.2

Refer to the exhibit. PC-A is unable to receive an IPv6 address from the stateful DHCPv6 server. What is the problem? The ipv6 dhcp relay command should be applied to interface Gig0/0. The ipv6 nd managed-config-flag should be applied to interface Gig0/1. The ipv6 nd managed-config-flag command should be ipv6 nd other-config-flag. The ipv6 dhcp relay command should use the link-local address of the DHCP server.

The ipv6 dhcp relay command should be applied to interface Gig0/0. 8.2.4

Refer to the exhibit. A network administrator is configuring a router for DHCPv6 operation. Which conclusion can be drawn based on the commands? The DHCPv6 server name is ACAD_CLASS. The router is configured for stateless DHCPv6 operation. Clients would configure the interface IDs above 0010. The router is configured for stateful DHCPv6 operation, but the DHCP pool configuration is incomplete.

The router is configured for stateless DHCPv6 operation. 8.2.2