BY SIMSON JOSEPH
ROLL NO. 30
The DHCP is a network configuration protocol
for hosts on internet protocol networks.
DHCP eliminates the manual task by a
DHCP is used for IPV4 as well as IPV6.
Alternatively,IPV4 hosts may use stateless
address autoconfiguration.IPV4 hosts may
use link-local addressing to achieve limited
DHCP was first defined as a standards track
protocol in RFC 1531 in October 1993,as an
extension to the BOOTP.
Many worked to clarify the protocol as it gained
popularity, and in 1997 RFC 2131 was released,
and remains as of 2011 the standard for IPV4
DHCPv6 was further extended to provide
configuration information to clients configured
using stateless address autoconfiguration in RFC
What is RFC?
Stands for request for comments
When standards are proposed ,they are
made available for public comment so
that they can be refined and agreed upon.
The document which details the proposed
standards is called a ”request for
comments ” document.
DHCP automates network –parameter
assignment to network devices from one or more
The DHCP server manages a pool of IP address
and information about client configuration
parameters such as default gateway , domain
name , the name servers ,other servers such as
Depending on implementation , the DHCP server
may have three methods of allocating IP-
A network administrator assigns a range
of IP addresses to DHCP , and each client
computer on the LAN is configured to
request an IP address from the DHCP
server during network initialization.
The request and grant process uses a
lease concept with a controllable time
The DHCP server permanently assigns a
free IP address to a requesting client from
the range defined by the administrator.
Server allocates an IP address based on a
table with MAC address/IP address pairs ,
which are manually filled in by a network
The DHCP is used simply to convey the
assigned address to the host.
It provides reliability in several ways :
6.Rebind or renew
The base DHCP protocol does not include
any mechanism for authentication.
Because of this , it is vulnerable to a
variety of attacks.
Unauthorized DHCP servers
DHCP is a network protocol that enables a
server to automatically assign an IP
address to a computer from a defined
range of numbers configured for a given
DHCP assigns an IP address when a
system is started.