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Multicasting Questions & Answers Topic: Multicasting Questions & Answers

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Quote gvkumar Replybullet Topic: Multicasting Questions & Answers
    Posted: 11Sep2009 at 5:44pm
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Multicasting Questions & Answers

What is multicasting?

Multicasting allows a single message to be sent to a group of recipients. Emailing, teleconferencing, are examples of multicasting. It uses the network infrastructure and standards to send messages. 

Define IP multicast.

IP multicast technology reduces traffic by sending stream of information to many recipients at one go. Video conferencing, stock quotas are the examples based on IP multicast. 

Describe how the multicast protocol works.

Multicast protocol or Internet protocol delivers a singles message to multiple machines. One packet from the source is replicated and sent to the destination. Every multicast message requires a multi case group. The group defines the addresses which will receive the message. The group is defined by the class D address. Different routing protocols are used to find the multicast groups and build routes for them. Distance Vector Multicast protocol is one of them. The receiver, to whom the multicast packet is sent to, needs to ‘join’ the group. Joining the group is enabled and managed by IGMP. Multicast routers are used to transmit the messages from one network to another. 

Describe how to control the scope of multicast transmissions.

Controlling the scope of multicast transmission restricts the range of group members. TTL (Time To Live) is one of the mechanisms to limit the scope. If the TTL value is small, packets would only be multicast to smaller distance destinations. More the value of TTL, more would be the scope of transmission to a larger number of machines. Administrative scoping is another mechanism. In this, transmission is restricted to a specific address space of an organization or a site. 

Explain why use Multicasting.

  • When the same message or packet needs to be sent to multiple destinations, multicasting is used.
  • Within campus and offices, using multicasting file distribution can be done. 
  • System messages, news and videos can be sent at the same time.
  • More commonly used for audio and video streaming. 

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Quote titly555 Replybullet Posted: 10Jan2013 at 3:55pm

I have read your post, Its good and informative. I want to know what are the benefits of multicasting? Is it applicable in SEO field? and how?

Edited by titly555 - 10Jan2013 at 3:56pm

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Quote maintenance Replybullet Posted: 09Nov2013 at 5:10pm
Really very helpful multicasting questions and answers.
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