DHCP Basics
This protocol automatically assigns IP addresses to devices on a network.
What is DHCP?
The range of IP addresses that can be assigned by a DHCP server.
What is scope?
The first message sent by a device to discover DHCP servers on the network.
What is DHCPDISCOVER?
The amount of time a DHCP server leases an IP address to a device.
What is lease time?
The unique identifier for a network interface card.
What is a MAC address?
DHCP stands for this.
What is Dynamic Host Configuration Protocol?
IP addresses that are blocked off and can't be assigned by DHCP.
What is exclusion range?
The message sent by the DHCP server in response to a discover message.
What is DHCPOFFER?
Typical default lease time for DHCP in hours.
What is 24-48 hours?
This server translates domain names to IP addresses.
What is DNS?
This device commonly contains a DHCP server in a home network.
What is a router?
An IP address specifically assigned to a device, like a printer, that can't be given to other devices.
What is reservation?
The message sent by a device to accept the offered IP address.
What is DHCPREQUEST?
This allows devices not directly connected to the network to get an IP address.
What is DHCP relay?
The IP address of the router that connects a local network to other networks.
What is default gateway?
The port number DHCP uses for its service
What is 67?
The type of DHCP assignment where IP addresses are temporary and can change.
What is dynamic assignment?
The final message sent by the DHCP server to confirm the IP address lease.
What is DHCPACK?
This helps set up DHCP relay to pass along requests between the DHCP server and another device.
What is IP helper/UDP forwarding?
This mask determines which part of an IP address refers to the network and which to the host.
What is subnet mask?
This type of DHCP assignment keeps the same IP address for a device permanently on a network.
What is static assignment?
The maximum number of IP addresses that can be leased by a DHCP server.
What are available leases?
The message sent by a device when it wants to disconnect from the network.
What is DHCPRELEASE?
These are additional configuration settings sent by DHCP, such as DNS server and default gateway.
What are scope options?
The protocol used by DHCP for sending messages.
What is UDP (User Datagram Protocol)?