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What Kind of Ethernet (Cat5, Cat5e, Cat6, Cat6a) Cable Should I Use?

In the digital age, the importance of a reliable and fast internet connection cannot be overstated. Whether for personal use or business operations, a stable network connection is crucial. One of the key components that determine the quality of your network is the Ethernet cable. With a variety of Ethernet cables available in the market, such as Cat5, Cat5e, Cat6, and Cat6a, choosing the right one for your needs can be a daunting task. This comprehensive guide aims to demystify these categories and help you make an informed decision.

Ethernet Cables: The Basics

Ethernet cables are the lifeline of any wired network. They are the physical medium through which data travels from one device to another within a network. These cables are grouped into sequentially numbered categories, often referred to as “cat” for short. Each category has different specifications, and sometimes the category is updated with further clarification or testing standards (e.g., 5e, 6a). These categories are designed to help us easily understand what type of cable we need for a specific application.

Cat5e: The Enhanced Cat5

The Cat5e, or Category 5 enhanced, is the improved version of the legacy Cat5 cables. Introduced in 2001, Cat5e was the first Ethernet cable type to deliver 1 Gigabit network speed, which today is the minimum someone should consider for their network. Typically, Cat5e cables consist of 24 gauge twisted pair wires and offer gigabit ethernet up to 328 feet. The MHz of Cat5e cables rates at 100, which means the CPU can process up to 100 million commands in a single second.

The “e” in Cat5e stands for “enhanced,” which means it undergoes more stringent testing for eliminating crosstalk (interference from multiple signals) than its predecessor, Cat5. This makes Cat5e cables more reliable for delivering high-speed data without interruptions.

Cat6: The Current Standard

The Cat6, or Category 6, is the current standard in cabling for high-speed Ethernet networks. Introduced in 2002, Cat6 cables offer Gigabit Ethernet up to 100 meters and typically utilize a 23-gauge conductor. They are designed to support higher speed required by the 10 Gigabit network. However, they have a limited higher standard support (164 feet), after which the ultimate speed distance of Cat6 cables is the same as Cat5e cables. At a frequency bandwidth of 250MHz, Cat6 cables offer a far greater processing speed than Cat5 cables.

One of the significant improvements in Cat6 cables over Cat5e is the enhanced insulation, which reduces crosstalk. However, the increased performance comes with a downside: Cat6 cables are generally more expensive than Cat5e cables.

Cat6a: The Augmented Cat6

The Cat6a, or Augmented Category 6, is the most advanced Ethernet cable on this list. Like Cat 6 cables, Cat 6a cables are also 23 gauge. However, they are substantially thicker than Cat 6 cables due to the tighter winding of the wires. This creates more copper per inch as well as the layer of extra-thick plastic around the wires themselves. Compared to Cat 5e and Cat 6 cables, Cat 6a cables offer less cross talk, less signal loss, and a larger frequency bandwidth of 500 MHz—double that of Cat6 cables.

The “a” in Cat6a stands for “augmented,” which means these cables are designed to deliver exceptional performance over longer distances. They can support 10 Gigabit Ethernet at lengths up to 328 feet, making them an excellent choice for large-scale deployments.

Shielded vs. Unshielded

Ethernet cables come in two types: shielded (STP) and unshielded (UTP). The difference lies in the way these cables are designed to handle electromagnetic interference.

Unshielded twisted pair cables, as the name suggests, do not have any shielding and rely on the twisted pair design to reduce electromagnetic interference. They are typically used for cables between your computer and the wall.

On the other hand, shielded twisted pair cables have a protective shield around each pair of wires, which further protects the cable from external interference. Shielded cables are ideal for areas with high interference and for running cables outdoors or inside walls.

Solid vs. Stranded

The terms “solid” and “stranded” refer to the physical construction of the cable, specifically the conductor inside the cable. Solid Ethernet cables use a single piece of copper for the electrical conductor, while stranded cables use a series of copper cables twisted together.

Stranded cables are more flexible and should be used at your desk or anywhere you may be moving the cable around often. Solid cables, on the other hand, are not as flexible but are more durable, making them ideal for permanent installations as well as outdoor and in walls.


In conclusion, the type of Ethernet cable you should use depends on your specific needs. If you’re setting up a network that requires high-speed data transmission and minimal interference, then Cat6 or Cat6a cables would be the best choice. However, if you’re setting up a small home network, then Cat5e cables would be sufficient. Always consider the requirements of your network before choosing the right Ethernet cable.

Remember, the quality of your network doesn’t solely depend on the type of Ethernet cable you use. Other factors such as the quality of your networking gear and the way your network is set up also play a significant role. So, make sure to consider all these factors when setting up your network.