Hot Downloads



The forum is in read only mode.
Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: question about multicasting

question about multicasting 14 years 6 months ago #6119

Helllo I am new to networking concepts, Have been reading the site, its remarkable to say the least. The only concept I have a little difficult with grasping is this:

When it comes to multicasting as opposed to Broadcasting, a packet is recieved by a computer with a MAC/IP mapped destination Mac address, but how does the machine know its not supposed to recieve the multicasted message, as opposed to a broadcast where every machine will recieve the package. To rephrase that again, when a multicasted package is sent out, its asserted to represent a multicast package, but doesnt every machine recognize the 01 bit the same way, and understand its a multicast, moving onto the networking layer, checking IP, which will be recognized as a multicast package as well. How is a machine excluded from a multicast on a network? I hope my question is clear enough!

Re: question about multicasting 14 years 6 months ago #6136

  • jhun
  • jhun's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 356
  • Thank you received: 0

if i understood your question i think your asking what's the difference between a multicast and a broadcast.

well multicasting is sending data or message to a selected group while a boradcast sends data/message to everyone.connected within the network.

i think when you send a mulitcast packet over the network, each host on the network analyzes the packet sent. and since the packet contains information regarding to which IP and MAC address the packet is intended to, the machines that recognize that the packet is not for them to receive so they reject it until the packet intended for the machine or host is receive. (as this is what what i understand although i maybe wrong :roll: )
  • Page:
  • 1
Time to create page: 0.111 seconds


Cisco Routers

  • SSL WebVPN
  • Securing Routers
  • Policy Based Routing
  • Router on-a-Stick

VPN Security

  • Understand DMVPN
  • GRE/IPSec Configuration
  • Site-to-Site IPSec VPN
  • IPSec Modes

Cisco Help

  • VPN Client Windows 8
  • VPN Client Windows 7
  • CCP Display Problem
  • Cisco Support App.

Windows 2012

  • New Features
  • Licensing
  • Hyper-V / VDI
  • Install Hyper-V


  • File Permissions
  • Webmin
  • Groups - Users
  • Samba Setup