Ashwaq Javed: Dynamic Host Configuration Protocol(DHCP)

What is DHCP:-

It gives Addresses automatically to the client who is requesting for an IP address

Centralized IP Address management

DHCP prevent IP address conflict and help conserve the use of client IP Address on the on the network

DHCP reduces the complexity and amount of administrator work by assigning TCP/IP configuration automatically to the clients.

Types of IP Addresses:-

Static IP address

- Address that are manually assigned and do not change over time

Dynamic IP address

- Address that are automatically assigned for a specific period of time and might change
Authorization:-

In domain model the DHCP server should be authorized to assign the IP addresses to client.

It is a security precaution that ensures that only authorized DHCP server can run in the network. To avoid computer running illegal DHCP server in the network.

Scope:-

A scope is a range of IP addresses that are available to be leases to clients.

DHCP Lease Generation Process(DORA):-

This process of assigning the IP addresses by the DHCP server also known as DORA (Discover, Offer, Request, and Acknowledgement).

Step 1:

                    Your computer sends a "Discovery" request, asking for it's IP information from
   any listening DHCP servers.
     2. Step 2:

                     Any listening DHCP servers will "Offer" their configuration information to your
                     workstation.

     3. Step 3:

                    You workstation chooses the best lease then "Requests" that lease from the
   corresponding DHCP server.

    4. Step 4:

                    The DHCP server you requested the IP configuration information from then
"Acknowledges" your request and leases you the IP configuration information.