DHCP

Dynamic Host Configuration Protocol assigns dynamic IP addresses to devices on a network.

With dynamic addressing, a device can have different IP address every time it connects to network.

Why to use DHCP?

Every device on a TCP/IP based network must have a unique IP address.

IP address of computer moved from one subnet to another subnet must be configured manually.

With DHCP, total process is automated and managed centrally.

DHCP server maintains a pool of IP addresses.

Leases an address to any DHCP-enabled client when it starts up on the network.

Process of DHCP

- DHCP client requests DHCP server for IP Address.

- DHCP server offers available IP address for client.

- DHCP client sends a message to server indicating accepting the offer.

- DHCP server sends a conformation message indicating client to use the IP address assigned to it.

Benefits

- No need of manual configuration.

- No need to record IP addresses assigned.

- Automatically assign a new IP address.

- Address duplication is eliminated.