- Point-to-point connections
Point-to-point connections put in direct communication two network devices without the need of using another device (as a router or a modem) to create the connection. An example are Bluetooth and direct wi-fi connections, that, using aerials able to send and receive radio signals and proper communication protocols, enable to create a local network of about 30 feet in which is possible to exchange all kinds of data. - Multicast/broadcast connections
Multicast connections are for transmit data to a series of devices/users simultaneously. Example of that type of connection are wireless networks and ethernet. Thanks to multicast connections is possible to send data to a group of devices without replicate the sending for any single user, reason why is defined “cheap” connection. There are different kinds of multicast connections according to the number of devices involved:
– Unicast: the message is sent only to one network member
– Anycast: the recipient is unique but not predetermined, usually it is the closest network node at the moment of data transmission (that technique is used in Content Delivery Network because is the fastest way to send data)
– Multicast: in the multicast connections the communication addressees are more than one, but non all the network members. Multicast connections, as streaming video, allow to exchange data with a restricted number of users.
– Broadcast: to send data to all the network devices you need a broadcast connection, as the TV signal, where all the users are simultaneously involved in the communication. - Multipoint connections
Multipoint connection can be considered as a particular kind of broadcast connection, in which devices (more than two) use the same communication channel and share resources. The sending of data can be executed in two different ways: devices use available resources alternately, with a temporal point of view, or bandwidth capacity is divided among them and used at the same time.
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- Point-to-point connections