The hardware needed to connect stand-alone computers into a Local Area…

The idea

A stand-alone computer works alone, so connecting computers into a Local Area Network requires hardware that moves data between them. A NIC gives each computer a network interface and a MAC address. Transmission media carry the signals: copper cable such as Cat5e or Cat6 uses electrical signals, fibre optic cable uses light, and wireless uses radio waves. A switch connects devices within one LAN and forwards frames only to the intended port. A wireless access point lets wireless devices join the wired LAN by converting between radio and wired signals. A router connects the LAN to other networks, such as the internet, and directs packets between them. Together these devices allow reliable, addressable communication.

What earns the marks

• States that a NIC allows a stand-alone computer to connect to a network and provides a MAC address.
• Identifies transmission media as the path for data, giving examples such as copper cable, fibre optic cable or wireless radio waves.
• Explains that a switch connects devices in a LAN and forwards data to the correct device rather than broadcasting to all.
• Explains that a wireless access point allows wireless devices to connect to a wired LAN.
• Explains that a router connects a LAN to other networks and directs packets between networks.
• Links hardware choices to factors such as distance, bandwidth, cost, interference and whether devices are fixed or mobile.

Common mistakes and how to put them right

• Confusing a switch with a router.

  Put it right by explaining that a switch connects devices within one LAN, while a router connects different networks and directs packets between them.

• Thinking a wireless access point provides internet access by itself.

  Put it right by explaining that it connects wireless devices to the LAN, and a router is normally needed to reach other networks.

• Treating wireless as a cable-free type of NIC.

  Put it right by explaining that a NIC is the interface in the device, while wireless is a transmission medium using radio waves.

Exam tips

• Name each hardware item and give its specific job in one sentence, using terms such as frame, packet, MAC address and radio waves accurately.
• When a question asks for hardware needed, include both the devices and at least one transmission medium.
• For scenario questions, choose hardware that matches the stated needs, such as a wireless access point for mobile devices or fibre optic cable for a long, high-bandwidth link.