DHCP

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1. DHCP uses IP protocol and runs over UDP (port 67 and port 68)

2. DHCP process:

Step 1: DHCP Discover ( from client to server):

client --------------------------- Server

DHCP Discover ->

S-IP: 0.0.0.0

D-IP : 255.255.255.255

Step 2) DHCP offer ( from server to client):

client ------------------------------- Server

<- DHCP offer

Server offers: IP address,mask,Gateway,DNS,

Destination: leased IP from Server

Source IP: IP of the server

Step 3) DHCP request ( from client to server, as broadcast):

client ----------------------------------- Server

DHCP Request ->

Dest IP:255.255.255.255

Step 4) DHCP Acknowledgement ( from server to client)

Client -----------------------------Server

<-DHCP Ack

3. Leased time by DHCP server