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1ServerProvides servers for the network users.
2File ServerTo store and provide files to the user.
3Web ServerUploads and distributes web pages with their linked to the internet.
4Database ServerProvides database services to other computer users and programs.
5Backup StorageAn essential part of maintaiming the security of data. You can store data on a removable device, such as a hard disk.
6PrintersThese can be black and white or in colour. They can be attached to a single computer or they can be connected via a network, so they can all be shared.
7Network InfrastructureSuch as Ethernet cabling and fibre-optic cabling.
8FirewallSits between the internet and the network and acts as a security guard for the local area network. All data that is passed through is checked,using a set of rules, to to protect the network from unauthorised access.
9HubUsed for connecting many ethernet-cable-type devices, such as computers. It has several ports, where the devices are connected. The data is recieved is sent out again to all other ports, exept the input port.
10SwitchSimilar to hubs, but switched data transfer is more efficient, as the data is transferred to the destination line output, rather than every line.
11Wi-Fi RouterActs as a wireless access point for a range of wi-fi devices, such as computers, tablets, laptops and mobiles.
12Network Interface Card (NIC)Connects the computer to the motherboard.