Ø    It works based on  Client-Server model . Ø    It uses UDP port no.   67 and 68   for working. ·         Port no. 67 - Server provides services. ·         Port no. 68 - Client listens. Ø    It uses  DORA   process for it’s working (Complete IP allocation process) ·       Discover ·       Offer ·       Request ·       Acknowledgement Ø    Suppose there are  four computers having IP addresses  provided by Dynamic Host Configuration Protocol server with the help of this address, they are communicating with each other. Ø    Let us consider,  one more new device (client) is added  in the network. It needs an IP address to communicate with other devices in the network. Ø    We have configured this device that it should take IP address dynamically from DHCP server (Automatic setting). Ø    So this  client send the  Discover message   in the network to all devices  ( Broadcasting of message- 255.255.255.255 ) Ø    This message contains source UDP

Sr No IPv 4 IPv6 01 It is 32-bit IP Address It is 128-bit IP address 02 It is numeric address whose octets are separated by dot ( . ) It is alphanumeric address whose octets are separated by colon (:) 03 It is written in decimal format It is written in hexadecimal format 04 It has 5 different classes   i.e. Class-A, Class-B, Class-C, Class-D, Class-E It does not have classes   i.e. classless 05 It support 2 32 =4.3 billion IP address(limited) It support 2 128 =3.4 x 10 38 IP address(unlimited) 06 It supports VLSM(Variable Length Subnet Mask) It does not support VLSM(Variable Length Subnet Mask) 07 Manual or DHCP based IP configuration No need of manual or DHCP configuration. Nodes are capable of Auto-Configuration 08 It has lack of security at network layer It has built-in strong security 09 Addres