Multicasting - Advantages and Disadvantages

 In this section, We will discuss about Multicast, advantages and disadvantages. Till now we have seen what is multicasting and what are the benefits of  using multicasting in network.

Now let’s start with Multicast advantages -

Multicast Advantages:

Available network bandwidth is utilized more efficiently since single stream of data are replaced with a multiple streams locally by using multicast. It will increase the productivity. Below you can see the graph. This will help you to analyse the benefit for Multicast over Unicast.

 Let’s see multicast Disadvantages -

Multicast Disadvantages

Multicast is UDP-based

  Best-effort delivery: Drops are to be expected. Multicast application must not expect reliable delivery of data and should be designed accordingly. Reliable multicast applications will address this issue.

  No congestion avoidance: The lack of the TCP windowing and "slow-start" mechanisms can result in network congestion. If possible, multicast applications should attempt to detect and avoid congestion conditions.

  Duplicates: some multicast protocol mechanisms result in the occasional generation of duplicate packets. Multicast applications should be designed to expect occasional duplicate packets.

  Out-of-sequence delivery: Network topology changes affect the order of delivery -- the application must properly address the issue.

Now we completed, Multicast advantages and disadvantages. It will help you to decide, will it be beneficial for your company/requirements.

For my opinion -

Multicasting is more efficient means, delivering of content where a single sender needs to deliver the content to multiple receivers. This task may be achieved through the use of multicast groups.

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Multicasting

This Section, I will be discussing Multicast. What is multicast? Why it is useful? What are advantages and disadvantages of Multicast and all Theory about Multicast related topics and some configurations. This section is divided into many topics which are listed below. You can find all into Multicast Label.

Topics included:

Multicasting

Multicast Address Ranges

Mapping of Multicast IP address to Mac address

Distribution Trees :

Source Tree

Shared Tree

PIM

PIM Dense Mode

PIM Sparse Mode

PIM Sparse Dense Mode

RPF Check

IGMP

Bootstrap (BSR)

Let’s see Types of Communications:

Unicast – One to one

Broadcast – One to All

In this two modes of communication, We don’t have any method of communication. Where we can address specified group of host.

Multicast – One to Many  (Specific host form Group)

Unicast  Vs Multicast

 Multicast - is the delivery of a single stream or information to a group of destination host simultaneously in a single transmission from the source creating copies automatically in other network using Network Devices like routers for efficient bandwidth utilization.

For example Radio:

                As you want to listen Radio , you will tune to particular Radio frequency and you can listen it. It’s same in multicast, you can join the multicast group you will access the real time applications.

Multicast is majorly used in Real time applications like, Voice, Video, Stock Broking applications, etc.

Why Multicast:

–    Used when sending same data to multiple receivers

–      Better bandwidth utilization

–      Used when addresses of receivers unknown

–      Used when simultaneous delivery of information for a group of receivers is required

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