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1ServerComputer networks always have one or mor powerful computers known as servers to work fo the whole network. They can be used as
-file servers
-webservers
-Dtabase servers
2Backup storageBackup storage can be used to store important data and prevent it getting lost. every night, businessses back up their data to removable media such as a hard disk or magnetic tape, or they store it on the cloud.
3FirewallA firewall is a device that protects a network from intrusion. it checks all the data that runs through it and so it can prevent hackers from accessing the network. It is often used to stop malware reaching a computer from the internet.
4PrintersPrinters can be used to print out data from a computer. They can print in colour or black and white. They could be attached to just one computer, but normally, they are used as part of a network to allow several computers to share the same printer.
5Network infrastructureThis is used to actually connect the computers and devices in the network. it could be an ethernet cable or a fibre optic cable.
6Network interface cardAlso known as a NIC, this has an ethernet cable input and is simply fitted into a spare slot in the back of the computer to connect to the motherboard.