Choose the connection from one end to the other

Computer Cables & Networking Accessories

Cables that look similar can carry different signals, speeds and power levels. Start with the two devices you want to connect and the job the connection must perform. Then select the ports, cable length and supported capability as a complete chain, including any hub or adapter.

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1M/2M/3M/5M Ethernet Network Lan Cable Cat6 1000Mbps Used For Network Link Au - 3M

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Related reading

Identify the signal before the plug

A cable may be intended for charging, USB data, Ethernet networking or a display connection. Connector shape alone does not establish all those functions. A USB-C charging lead, for example, should not be assumed to carry a monitor signal unless that capability is stated for the cable and devices.

Use a practical cable length

A cable that barely reaches can pull on a socket when equipment moves. Excess length creates loops that are harder to organise. Measure the actual route around furniture and leave service slack, particularly for a rising desk or swivelling display, without stretching the connection.

Understand what an adapter does

A travel plug adapter changes the connection to a wall socket; it does not automatically convert voltage. A USB hub adds ports but may divide available power or data bandwidth. Choose the accessory's stated function and supported devices, not just the number of sockets visible in the photograph.

Further reading: USB-IF: USB-C capability and terminology

Further reading: Hammond Manufacturing: line transformer selection

Useful answers

Computer Cables & Networking Accessories: practical questions

Why can a USB-C cable charge a laptop but fail to connect a monitor?

Charging and display transmission are separate capabilities. The source port, cable and display connection must all support the intended video signal. A USB-C connector alone does not establish that support, so choose the cable for its stated function as well as its ends.

How should I measure the cable length needed behind a desk?

Follow the actual route around furniture and between the ports, then allow movement and accessible connections. Include the raised position of an adjustable desk or the turn of a screen. A straight-line measurement can leave a cable pulling tight when the equipment moves.

Does an adapter convert the signal or only change the connection?

It depends on the adapter. Some change a physical connector; others perform a specified conversion or add ports with shared resources. Identify the direction and function required. In particular, a travel plug adapter should not be assumed to convert the appliance’s operating voltage.