Network Technologies

This system generally also allows possibility of addressing the packet to all destinations (all nodes on the network)
. When such a packet is transmitted and received by all the machines on the network
. This mode of operation is known as Broadcast Mode
. Some Broadcast systems also supports transmission to a sub-set of machines, something known as Multi casting
 Point-to-Point Networks A network based on point-to-point communication is shown in Fig
. The end devices that wish to communicate are called stations
. The switching devices are called nodes
. Some Nodes connect to other nodes and some to attached stations
. It uses FEM or TAM for node-to-node communication
. There may exist multiple paths between a source-destination pair for better network reliability
. The switching nodes are not concerned with the contents of data
. Their purpose is to provide a switching facility that will move data from node to node until they reach the destination. 

Network Technologies

 Network Technologies There is no generally accepted taxonomy into which all computer networks fit, but two dimensions stand out as important: Transmission Technology and Scale
. The classifications based on these two basic approaches are considered in this section
.Classification Based on Transmission Technology Computer networks can be broadly categorized into two types based on transmission technologies: • Broadcast networks • Point-to-point networks Broadcast Networks Broadcast network have a single communication channel that is shared by all the machines on the network as shown in Fig sand  All the machines on the network receive short messages, called packets in certain contexts, sent by any machine
. An address field within the packet specifies the intended recipient
. Upon receiving a packet, machine checks the address field
. If packet is intended for itself, it processes the packet; if packet is not intended for itself it is simply ignored.