Understand that networks can be wired or wireless.

The idea

A network connection between devices can be made using physical cables (wired) or without cables using radio signals (wireless). Wired connections, such as Ethernet cable, generally offer a stable, fast and secure link but require physical installation and restrict device movement. Wireless connections, such as Wi-Fi, allow devices to move freely and avoid cabling costs but can be affected by interference, distance from the access point and obstacles such as walls, and need security measures because signals travel through the air. Many networks use a mixture: for example, a school may use wired Ethernet for desktop computers in a lab and wireless Wi-Fi for laptops and tablets. A learner should be able to classify a given connection as wired or wireless and give a reason for choosing one over the other in a scenario.

What earns the marks

• States that a network connection can be wired, using physical cables such as Ethernet.
• States that a network connection can be wireless, using radio signals such as Wi-Fi.
• Gives an advantage of wired connections, for example greater stability, speed or security.
• Gives an advantage of wireless connections, for example device mobility or avoiding cabling costs.
• Gives a limitation of wireless connections, for example interference, reduced range or the need for security.
• Applies the choice to a scenario, for example recommending wired for fixed lab computers and wireless for mobile devices.

Common mistakes and how to put them right

• Believing all networks are wireless.

  Put it right: Is that networks can be wired, wireless or a mixture of both.

• Assuming wireless is always better because there are no cables.

  Put it right: Is that wireless can suffer interference and reduced range, and wired links are often more stable and secure.

• Thinking a device can only ever use one type of connection.

  Put it right: Is that many devices and networks combine wired and wireless links.

Exam tips

• When asked to choose, name the connection type and give a reason linked to the scenario, such as mobility or stability.
• Use precise terms such as Ethernet for wired and Wi-Fi for wireless rather than vague wording.
• Balance advantages against limitations so your answer shows understanding of both options.