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New Member

What is the sources of broadcast in LAN

Hi, Can any one explain why broadcast is needed in LAN Network.

2 REPLIES
VIP Purple

Re: What is the sources of broadcast in LAN

Hello,

in general, broadcasts on a LAN are needed for address resolution. When a node needs to communicate with all of the network, it sends a datagram to MAC address 0xFFFFFFFF (a broadcast), which is an address to which the network interface card (NIC) of every host must respond. An IP workstation broadcasts an Address Resolution Protocol (ARP) request every time it needs to locate a new IP address on the network.

For example, the command:

telnet www.cisco.com

translates into an IP address through a Domain Name System (DNS) search, and then an ARP request is broadcast to find the actual station.

You might find this document interesting:

Broadcasts in Switched LAN Internetworks

http://www.cisco.com/univercd/cc/td/doc/cisintwk/idg4/nd20e.htm#26934

HTH,

Georg

New Member

Re: What is the sources of broadcast in LAN

Hi , Georg

Thanks very much it was helpfull.

Regards

OMAR

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