About Cat 6 Cables
Ethernet is computer networking technology which first appeared in the 1980s. Originally based around coaxial cables, it now uses twisted pair cabling. Gigabit ethernet is a catch-all term for technologies able to manage data transfer at a gigabit per second. Introduced around the turn of the century, it was standard by about 2010.
Category 6 cable, common referred to as Cat 6 cable, or simply Cat6, is defined as supporting 1GbE (1 Gigabit Ethernet - equivalent to 1000MbE) transfer at a frequency of up to 250Mhz over cables of up to 100 metres, although it can achieve 10GbE over shorter distances. Cat 6 cable is a useful, flexible choice for many applications up to this bandwidth, as it is back-compatible with Cat 5 and Cat 5e connections.
If you're not sure what you're currently using, look closely at the cable, which should be labelled with the cable category along its length. It's fine to use different Categories of GbE cable together so long as the slowest cable will cope with your equipment's maximum speed. If that gives you options, it is wise to choose the fastest available cable to futureproof your set up.
Cat 6 cable may be sold with our without end connectors fitted, and end connectors can come in different styles. The traditional ethernet connector has a catch which is pinched to release the cable. This, in its released state, prevents the cable from being accidentally disconnected. No-catch or no-snag connectors are designed without this catch, which can be annoying if it catches on fabrics or edges, and may snap off leaving the plug liable to fall out.
For most applications you will fit identical plugs to each end of your cable, and it doesn't matter which end you plug in where.