Module 7-DHCPv4

What is the destination IP address used when an IPv4 host sends a DHCPDISCOVER message to the DHCP router?

• IP address of the default gateway

• IP address of the default gateway

• 224.0.0.1

• 255.255.255.255

What type of DHCPv4 message is sent from a DHCP server confirming that a host may use the offered IP lease? 

• DHCPACK

• DHCPDISCOVER

• DHCPREQUEST

• DHCPOFFER

What is the purpose of the default-router [ip-address] command being assigned to an interface while configuring DHCPv4 on a router?

• It assigns the gateway of the router interface for the pool of DHCPv4 addresses.

• It configures the DHCPv4 relay agent.

• It assigns the server acting as the DHCPv4 server.

• It assigns the DNS server to resolve name to IP conversions.

Which port numbers are used by DHCPv4?

• 53 and 54

• 67 and 68

• 546 and 547

• 678 and 679

What type of message does a DHCPv4 client send the DHCP server when it's lease is about to expire?

• DHCPDISCOVER

• DHCPACK

• DHCPOFFER

• DHCPREQUEST

What command can be used to check the IP address mappings to a particular MAC address?

• show ip dhcp pool

• show ip dhcp binding

• show ip dhcp server statistics

• show running-config | section_dhcp

Why would you use the ip helper-address command on a router interface?

• To reduce the response time from a DHCP server.

• To broadcast DHCPv4 messages to a DHCPv4 server on the local network segment.

• To forward DHCPv4 IP to MAC mappings to other hosts.

• To allow the router to forward DHCPv4 broadcasts to a DHCPv4 server on another network segment.

When would a WAN interface of a router likely be configured using the ip address dhcp command on a router interface?

• To configure the router interface as a DHCP client from the ISP.

• To configure the router as a DHCP server.

• The router is also the gateway for a LAN.

• The router serves a web server for public access on the LAN that is attached to the router.

Which of the following is an indication that a Windows computer did not receive an IPv4 address from a DHCP server?

• The computer cannot ping 127.0.0.1

• Windows displays a DHCP timeout message.

• The computer receives an IP address from the 169.254.0.0/16 range.

• The computer cannot ping other devices within the same 169.254.0.0/16 network range.