3com WX3000 User Manual

 

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Figure 1-1 Information transmission in the unicast mode 

Server

Host A

Host B

Host C

Host D

Host E

Packets for Host B

Packets for Host D

Packets for Host E

 

 

Assume that Hosts B, D and E need this information. The source server establishes transmission 

channels for the devices of these users respectively. As the transmitted traffic over the network is in 

direct proportion to the number of users that receive this information, when a large number of users 

need this information, the server must send many pieces of information with the same content to the 

users. Therefore, the limited bandwidth becomes the bottleneck in information transmission. This 

shows that unicast is not good for the transmission of a great deal of information. 

When you adopt broadcast, the system transmits information to all users on a network. Any user on the 

network can receive the information, no matter the information is needed or not. 

shows 

information transmission in broadcast mode.