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 the same information, the server must send many packets of information with the same content to
the users. While suitable for networks with small numbers of users, or where information transmitted to
users is significantly different, in other cases this is an inefficient use of the network, and when there is
limited bandwidth, bottlenecks can develop in information transmission. In general, unicast is not good
n to multiple recipients.
Inform
its information to all users on a network. Any user on the
ation is needed or not.
Figure 25-2
for the transmission of a great deal of the same informatio
ation Transmission in the Broadcast Mode
When you broadcast traffic, the system transm
network can receive the information, no matter if the inform
shows
information transmission in broadcast mode.
Figure 25-2
Information transmission in the broadcast mode
Source
Server
Receiver
Receiver
Receiver
Host A
Host B
Host C
Host D
Host E
Packets for all the network
Hosts B, D, and E need the information. The source server broadcasts this information
n, when only a small number of users on the same network need the information,
Therefore, broadcast is disadvantageous in transmitting data to specific users, and is more bandwidth
Assume that
through the routers, reaching the targets, but also Hosts A and C on the network receive this
information.
This is an efficient way to send the same content to densely distributed users. However, as we can see
from the information transmission process, security and restricted use of paid services cannot be
guaranteed. In additio
the utilization ratio of the network resources is very low and the bandwidth resources are greatly
wasted.
intensive.
25-2