What is Dora in networking?

Answer 1

The DHCP Server keeps all the information and data base about the DHCP Cliencts. And it works as folows. ________ ________ | | <-----D------------> Discover-------------> | | |DHCP | <-----O------------> Offer----------------> |DHCP | |SERVER | <-----R------------> Request--------------> |CLIENT | |________| <-----A------------> Acknowledgement------> |________|

I want further answers regarding this. please do send me.

1. DHCP automatically Discover the systems , 2. Server Send the offer to the client systems ,

3. Client send the Request to Server System,

4. last one Acknowledgement send by Server to Client

I would like to make an amendment to that so that it is somewhat further understood in it's entirety.

1st: Hardware sends a broadcast asking for information regarding DHCP servers within the network (or Sub-net of course).

2nd. DHCP server responds saying "Hey, I'm here!"

3rd. Hardware sends a query for an IP address (not the same as the request phase.)

4th. DHCP server comes back with "Here ya go, you can have xxx.xxx.xxx.xxx if you want it!"

5th. Hardware decides that's what it wants, so it requests a lease for that IP address.

6th. DHCP server acknowledges the request and assigns a lease time to that piece of hardware (identified by it's MAC address).

1st through 3rd is done through MAC as the hardware has no IP address and cannot communicate through IP. To do those communications before the IP addresses are assigned they use UDP packets with Source and Destination MAC addresses as beginning and end-points. And DHCP servers don't discover the hardware added, the hardware discovers the DHCP servers.

That's DORA in a nutshell.

Answer 2

DORA refers to the 4 phases of DHCP for acquiring a network IP address on a client.

D - discovery
O - offer of an address
R - request - the client requests the offered address by DHCP
A - DHCP acknowledges the request and the client has the requested address