What is DHCP

DHCP

 (Dynamic Host Configuration Protocol) Server Settings are commonly found on broadband router firmware. The DHCP section is where you can configure the router's built-in DHCP Server to assign IP addresses to the computers and other devices on your local area network (LAN). Other DHCP options include Enable DHCP Server and Add or Edit DHCP Reservation.

Dynamic Host Configuration Protocol (DHCP) is a protocol for assigning dynamic IP addresses to devices on a network. With dynamic addressing, a device can have a different IP address every time it connects to the network. In some systems, the device's IP address can even change while it is still connected. DHCP also supports a mix of static and dynamic IP addresses.

DHCP Simplifies Network Administration

Dynamic addressing simplifies network administration because the software keeps track of IP addresses rather than requiring an administrator to manage the task. This means that a new computer can be added to a network without the hassle of manually assigning it a unique IP address. Many ISPs use dynamic IP addressing for Internet subscribers.

WHAT is DORA process?

D ----------> Discover
O ----------> Offer
R ----------> Request
A ----------> Acknowledgement

Step 1:  D ----------> Discover

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

Step 2:  O ----------> Offer

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

Step 3: R ----------> Request

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

Step 4: A ----------> Acknowledgement

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


FOR Configuration of DHCP

DHCP configuration