DVMRP ,NAT,DHCP

DVMRP Distance Vector Multicast Routing Protocol

One of the First multicast routing protocol
It allows multicast routers to pass group membership and routing information among themselves
Its like RIP with extended for multicast
Protocol passes information about current multicast group membership and the cost to transfer datagram between them

NAT Network Address Translation

When an incoming datagram arrives from the internet ,NAT looks up the datagram's destination address in the translation table extracts the corresponding address of an internal host, replaces the datagram's destination address with the host 's address and forward the datagram across the local network to the host

122.232.56.69 →incoming from internet to →local network host 192.168.1.25


DHCP dynamic Host Configuration Protocol

• step 1

DHCP DISCOVER
Client send a discovery message to DHCP server with destination address 255.255.255.255

• Stept 2

 DHCP OFFER
Server acknowledge with  DHCP OFFER message with client MAC address+new IP address+subnet address+lease duration. two or more DHCP server can offer the DHCP OFFER message

• Step 3

DHCP REQUEST
Client the send A DHCP REQUEST To selected DHCP server for requesting offered IP address

• Step 4

DHCP ACKNOWLEDGEMENT
Server now assign the IP for the client and send DHCP ACKNOWLEDGE signal to client to use that IP


NAT and PAT Demonstration

Q.I.d.Illustrate the six main states of a DHCP client and transitions among them.[B. Tech. Degree VII Semester Examination November 2012 CS/IT 703 ADVANCED COMPUTER NETWORKS (2006 Scheme)]