Notes on DHCP

DHCP:

DHCP The TCP/ IP internet protocol DESIGNED BY : Bijay Shrestha Informatics college

CONTENTS:

CONTENTS Introduction to DHCP Functions of DHCP Types of Devices in DHCP Mechanisms used in DHCP Working of DHCP Advantages of DHCP DESIGNED BY : Bijay Shrestha Informatics college

INTRODUCTION TO DHCP:

INTRODUCTION TO DHCP DHCP is an acronym for Dynamic Host Configuration Protocol Originally defined in RFC 2131 and updated in 2939 Built on a Client-Server model Allows Devices to acquire their addressing information dynamically Basically defines two components Server delivering Host configuration information Client requesting and acquiring host configuration information NOTE : Addressing information includes IP address, default gateway address, Subnet mask and a DNS server address which may also include other various stuffs like WINS (Windows Internet Naming Service).

Functions of DHCP:

Functions of DHCP The main function of DHCP can be best explained by its use as it is used for automatically configuration of TCP/ IP. Apart from that it is also capable of managing and distributing IP addresses dynamically to all the host connected into a network.

Types of Devices in DHCP:

Types of Devices in DHCP The DHCP contains two types of devices Servers Clients Servers are responsible for assigning ADDRESSING INFORMATION to clients Clients requests ADDRESSING INFORMATION from server.

Mechanism in DHCP:

Mechanism in DHCP

Working of DHCP:

Working of DHCP Four step process between client (UDP port 68) and servers (UDP port 67) Client sends DISCOVER “Someone send me an address”. This is a broadcast. Servers OFFER “Use this address”. Client REQUEST “I’ll use this one”. (broadcast) Servers Acknowledge “OK or No Way!” (ACK/NAK)

Working of DHCP in simple form:

Working of DHCP in simple form

ADVANTAGES OF DHCP:

ADVANTAGES OF DHCP Reduces the amount of configuration on devices Reduces the likelihood of configuration errors on devices acquiring address information Gives more administrative control by centralizing IP address information and managing. Easy to implement and manage