What’s the Difference Between Cat 5e, Cat 6, Cat 6a and Cat 7 Network Cables?

Ethernet cables are categorised by performance standards that define their speed, bandwidth, and resistance to interference.

The most common types used in business networks today are Cat 5e, Cat 6, Cat 6a, and Cat 7.

Choosing the right cable depends on how the network will be used now and how it may need to perform in the future.

---

Cat 5e (Category 5 Enhanced)

Cat 5e cables are widely used and remain suitable for many standard business environments.

• Supports speeds up to 1 Gbps

• Designed for distances up to 100 metres

• Adequate for general office use, email, web access, and basic cloud services

• Lower resistance to interference compared to newer standards

Cat 5e is often sufficient for smaller networks or for networks with predictable, modest bandwidth demands.

---

Cat 6 (Category 6)

Cat 6 cables are designed to support higher performance and improved reliability.

• Supports 1 Gbps at 100 metres

• Can support 10 Gbps up to around 55 metres

• Better protection against crosstalk and system noise

• Thicker construction than Cat 5e, which can affect installation in tight spaces

Cat 6 is commonly used where improved performance or future expansion is expected.

---

Cat 6a (Category 6 Augmented)

Cat 6a is often considered the current “sweet spot” for business cabling.

• Supports 10 Gbps at the full 100 metres

• Significantly improved shielding and noise resistance

• Better suited to modern workloads, including large file transfers, VoIP, and high-density Wi-Fi

• Thicker and less flexible than Cat 6

Cat 6a is widely chosen for new installations where long-term reliability and future-proofing are priorities.

---

Cat 7 (Category 7)

Cat 7 is designed for high-performance environments but is less commonly deployed in typical business networks.

• Supports speeds of 10 Gbps and above

• Heavily shielded to minimise interference

• Uses specialised connectors in some implementations

• More expensive and complex to install

In many cases, Cat 7 offers little practical benefit over Cat 6a in standard office environments.

---

Cat 8 (Category 8)

Cat 8 is a newer standard designed primarily for data centre use.

• Supports speeds up to 25–40 Gbps

• Intended for short distances (up to 30 metres)

• Typically used for server-to-switch connections

Cat 8 is not usually suitable or necessary for general office cabling.

---

Summary Comparison

---

Which Cable Should You Choose?

For most business environments:

• Cat 5e is suitable for basic needs

• Cat 6 offers improved performance at a modest increase in cost

• Cat 6a provides the best balance of performance, longevity, and value

• Cat 7 and Cat 8 are typically reserved for specialist use cases

The right choice depends on network design, expected growth, and how the cabling will support other technologies such as Wi-Fi and VoIP.

---

Summary

Network cable standards differ in speed, noise resistance, and installation complexity. While Cat 5e remains widely used, Cat 6 and Cat 6a are often better suited to modern business networks. Higher categories such as Cat 7 and Cat 8 are designed for specialist environments and are not always necessary in typical office settings.