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DYNAMICHOSTCONFIGURATIONPROTOCOLPRESENTEDBY-

AANCHALARORA

AMITSAINI

JAGRITIRAJ

SRISHTITIWARI

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WHATISDHCP?The DHCP is a networkprotocol that is used toconfigure network devicesso that they cancommunicate on an IPnetwork.

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CONTD...DHCP assigns an IP addresswhen a system is started.All IP addresses of allcomputers are stored in adatabase that resides on aserver machine.

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DORA DISCOVER: When a client is configured with the ipsetting to obtain IP address automatically. Then theclient will search for DHCP server and the UDPBroadcast to the server about the DHCP discover OFFER: DHCP Server will offers a scope of ip addressavailable in the pool. REQUEST: In response to the offer the Client will

requests for an IP address. ACKNOWLEDGE:I n response to the request serverwill responds with all IP address Mask Gty Dns andwins info along with the acknowledgment packet.

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HOW DORA WORKS? Client makes a UDP Broadcast to the server with aDHCPDiscover or Discover packet. DHCP offers to the client. In response to the offer Client requests the server. The server sends DHCPAck acknowledging therequest which is the clients final permission to takethe address as offered.

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LEASEPERIOD The lease renewal process is the result of the

lease period value.

At any time during the lease period, the DHCP

client can send a DHCP RELEASE packet to the

DHCP server to release the IP addressconfiguration data and to cancel any remaining

lease.

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AUTOMATICLEASERENEWALPERIOD

A DHCPclient automatically attempts to

renew its lease as soon as 50 percent of the

lease duration has expired. The DHCP

client also attempts to renew its IP addresslease each time that the computer restarts.

To attempt a lease renewal, the DHCP

client sends a DHCP REQUEST packet

directly to the DHCP server from which theclient obtained the lease.

http://www.techbitnbyte.com/dhcp-what-is-it-why-it-is-used/http://www.techbitnbyte.com/dhcp-what-is-it-why-it-is-used/

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MANUALLEASERENEWALYou can renew an IP

lease manually if you

need to update DHCP

configuration information

immediately.

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APIPAThe Internet Assigned Numbers

Authority (IANA) has reserved

169.254.0.0-169.254.255.255 for

Automatic Private IP Addressing.

As a result, APIPA provides an

address that is guaranteed not to

conflict with routable addresses.

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WINDOWS 98/MECLICK

START

CLICK

RUN

TYPE

winipcfg

CLICK

OK

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WINDOWS XP/2000/2003CLICK

START

CLICK

RUN

TYPECMD

CLICK

OK

TYPE

ipconfig/all

PRESS

ENTER

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BOOTP In computer networking, the Bootstrap Protocol,

is a network protocol used by a network client toobtain an IP addressfrom a configuration server.

BOOTP is usually used during

the bootstrapprocess when a computer is startingup. A BOOTP configuration server assigns an IPaddress to each client from a pool of addresses.

http://en.wikipedia.org/wiki/Computer_networkinghttp://en.wikipedia.org/wiki/IP_addresshttp://en.wikipedia.org/wiki/Bootinghttp://en.wikipedia.org/wiki/Bootinghttp://en.wikipedia.org/wiki/IP_addresshttp://en.wikipedia.org/wiki/Computer_networking

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CONTD.. BOOTP uses the User Datagram Protocol(UDP)

as a transport on IPv4networks only.

Historically, BOOTP has also been used for Unix-

likediskless workstationsto obtain the networklocation of their boot imagein addition to an IP

address, and also by enterprises to roll out a pre-

configured client (e.g., Windows) installation to

newly installed PCs.

http://en.wikipedia.org/wiki/User_Datagram_Protocolhttp://en.wikipedia.org/wiki/IPv4http://en.wikipedia.org/wiki/Unix-likehttp://en.wikipedia.org/wiki/Unix-likehttp://en.wikipedia.org/wiki/Diskless_workstationhttp://en.wikipedia.org/wiki/Boot_imagehttp://en.wikipedia.org/wiki/Microsoft_Windowshttp://en.wikipedia.org/wiki/Microsoft_Windowshttp://en.wikipedia.org/wiki/Boot_imagehttp://en.wikipedia.org/wiki/Diskless_workstationhttp://en.wikipedia.org/wiki/Unix-likehttp://en.wikipedia.org/wiki/Unix-likehttp://en.wikipedia.org/wiki/Unix-likehttp://en.wikipedia.org/wiki/IPv4http://en.wikipedia.org/wiki/User_Datagram_Protocol

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DIFFERENCE BETWEEN DHCPBOOTPDHCP BOOTP

Intended to configure frequently

relocated networked computers

(such as portables) that have local

hard drives and full bootcapabilities

Intended to configure diskless

workstations with limited boot

capabilities.

8 Days expiration 30 Days expiration

Supports a larger and extensible

set of client configuration

parameters called options

Supports a limited number of client

configuration parameters called

vendor extensions

DHCP clients do not require a

system restart to rebind or renew

configuration with the DHCP

server.

Describes a single-phase boot

configuration process whereby a

DHCP client negotiates with a

DHCP server to determine its IP

address and obtain any other initial

configuration details it needs fornetwork operation.

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ANY

QUERIES???THANK YOU!