Networks

Advantages of networks:

They are important for communicating and sharing data which allows all users to access the right information. Networks allow data to be backed up. It allows different computers and hardware to connect to each other.

Disadvantages of Networks:

The user can become dependant on the network which means if it stops operating lots of resources may be inaccessible. It is hard to ensure security in a network which can be vulnerable to hackers. A network can degrade in performance as traffic increases.

Network protocols are rules that control the communication between devices.

The physical parts of a protocol are the physical connections such as wires or the frequencies used to send data.

The logical parts of a protocol are the things like the topologies like bus, star or ring for example, it can also include things like the file type used.

A network handshake is the exchange of signals to signify that the devices are ready to  communicate and to agree on protocols.