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The transmission technology can be categorized broadly into two types:
1. Broadcast networks and
2. Point-to-point networks.
1. Broadcast networks:• Broadcast networks have a single communication channel that is shared or used by all the machines on the network. Short messages called packets sent by any machine are received by all the others.
• Broadcast systems generally use a special code in the address field for addressing a packet to all the concerned computers. This mode of operation is called broadcasting.
• Some broadcast systems also support transmission to a subset of the machines known as multicasting.
• Upon receiving a packet, a machine checks the address field. If the packet is addressed to it then the packet is processed, otherwise the packet is ignored.
2. Point-to-point networks:• Point to point networks consists of many connections between individual pairs of machines. To go from the source to the destination a packet on these types of network may have to go through intermediate computers before they reach the desired computer.
• Often the packets have to follow multiple routes, of different lengths.
• Hence routing algorithms are very important in the point-to-point networks.
• An important general rule is as follows:
Small, localized networks (e.g. LAN) tend to use the broadcasting; whereas networks located over wide geographical areas (such as WAN) use point-to-point transmission.
There are basically2 types of transmission technologies:
1. Broadband :In this type every host sends the packet/message to all other hosts.
The message has a source address and a destination address. destination address helps the host to identify whether the message is indeed for them or for somebody else. The source address allows them to identify from whom the message has come.
2. Point to Point: In this type of technology there are multiple connections (transmission lines) between2 hosts. so the the packet can take different routes if a particular route is congested.
two types of transmission technology avialable are:
1- broadcast network
2- point to point network
i agree
