The 4 Types of Network Cable: A Guide for Businesses

What are the 4 types of network cable? The four main types are coaxial, shielded twisted pair (STP), unshielded twisted pair (UTP), and fiber optic cables. These are the most commonly used cables in networking, each serving different needs based on speed, distance, cost, and environmental factors, quite different from connectors like USB cables, which handle device-level connections rather than network infrastructure.

Whether you are wiring a new office, upgrading aging infrastructure, or evaluating options for a data center buildout, choosing the right network cable directly impacts your speed, reliability, and long-term costs. This guide covers all four cable types in detail, breaks down the Ethernet cable categories (Cat5e through Cat8), answers the most common questions we hear from business owners, and provides a decision framework so you can choose with confidence, and if you have any additional questions, feel free to reach out to LeadingIT’s managed IT services office in Chicago.

Table of Contents

• Introduction to Network Cabling
• Network Cable Comparison at a Glance
• 1. Coaxial Cables: The Original Network Solution
• 2. Unshielded Twisted Pair (UTP): The Most Common Network Cable
• 3. Shielded Twisted Pair (STP): Extra Protection for Demanding Environments
• 4. Fiber Optic Cables: The Fastest Network Solution
• Ethernet Cable Categories Explained: Cat5e Through Cat8
• Which Type of Cable Is Most Commonly Used in Wired Networks?
• Network Cable Color Coding
• How Different Cable Types Work Together
• How to Choose the Right Network Cable for Your Business
• Frequently Asked Questions
• Get Expert Help with Your Network Cabling

Introduction to Network Cabling

Network cabling is the physical foundation that every other layer of IT infrastructure depends on. A misconfigured firewall can be patched remotely. A bad cable run cannot. The wrong cable choice, or a correctly chosen cable that was poorly installed, can bottleneck an otherwise modern network, introduce intermittent failures that are difficult to diagnose, and require expensive remediation work years down the line.

According to Gartner, data center systems spending grew nearly 35% in 2024, reaching over $318 billion globally, a pace not seen since the post-recession recovery. That level of infrastructure investment directly drives demand for higher-performance cabling, with Cat6A increasingly becoming the commercial standard for new installations.

Different environments have fundamentally different requirements. An office deploying VoIP phones and wireless access points has almost nothing in common with a manufacturing floor running variable frequency drives, or a data center routing terabytes between switches. Understanding what each cable type is designed for, and where it breaks down, is the starting point for any sound infrastructure decision.

The sections below move from the oldest technology to the newest, covering construction, performance characteristics, real-world applications, and the specific scenarios where each cable type earns its place.

Network Cable Comparison at a Glance

Before diving into the details, here is a side-by-side comparison of the four types of network cables:

1. Coaxial Cables: The Original Network Solution

Coaxial cables contain a central copper conductor surrounded by a plastic insulator, a braided metal shield, and an outer protective jacket, similar to a wire inside a protective metal tube. The layered design, especially the metal shield, effectively blocks external electromagnetic interference (EMI), making coaxial cable one of the most durable and interference-resistant options available.

Coaxial was the dominant networking cable through the 1980s and 1990s, using 10Base2 (thinnet, 185m max distance) and 10Base5 (thicknet, 500m max distance) Ethernet standards. While no longer used for building new computer networks, coaxial remains widely deployed for:

• Cable television distribution
• Broadband internet from cable ISPs (using DOCSIS 3.1 technology, capable of multi-gigabit speeds)
• Security camera systems (CCTV)
• Legacy broadcast infrastructure

For businesses: You will most commonly encounter coaxial cable as the last-mile connection from your ISP. If your building still uses coaxial for internal networking, it is time to upgrade — the bandwidth limitations make it unsuitable for modern applications like cloud computing, VoIP, and video conferencing.

Coaxial Cables in Business Networks

In practice, most businesses encounter coaxial at two points: where internet service enters the building from the ISP, and in legacy CCTV systems that predate IP-based cameras. Neither requires the building to run coaxial for its internal network, but both mean coaxial often coexists alongside modern UTP and fiber infrastructure, particularly in older facilities that have been incrementally upgraded rather than fully rewired.

For organizations running hybrid infrastructure, this is worth understanding during any network audit or expansion project. Coaxial runs carrying ISP service or analog camera feeds typically remain in place while the internal network is migrated to structured cabling, and the two systems operate independently without interfering with each other. When planning a cabling project in an established building, mapping existing coaxial runs is a standard part of the site survey.

2. Unshielded Twisted Pair (UTP): The Most Common Network Cable

Twisted pair cables were originally developed for telephone networks, a legacy that explains both their name and their widespread adoption in structured cabling. UTP cables are now the workhorses of modern business networks. They consist of four pairs of color-coded copper wires twisted together inside a plastic jacket. The twisting naturally reduces electromagnetic interference and crosstalk between wire pairs without requiring additional shielding, keeping costs low and installation simple.

Which type of network cable consists of 4 pairs of twisted wires? The answer is twisted pair cable, specifically, both UTP and STP variants. In a standard Ethernet cable (Cat5e, Cat6, or Cat6a), you will find eight individual wires organized into four color-coded pairs. Each pair is twisted at a different rate to minimize crosstalk. The standard connector is the RJ-45, an 8-position, 8-contact plug that is the universal standard for Ethernet connections.

Which type of conductor wire is used for cables behind walls?

For permanent installations behind walls, through conduits, or above ceiling tiles, solid-core UTP cable is the standard choice. Solid-core cable uses a single thick copper conductor per wire, which provides lower signal attenuation over longer distances and is easier to punch down into patch panels and wall jacks. Stranded cable, by contrast, uses bundles of thinner copper wires that offer greater flexibility and is used for short patch cables between devices and wall outlets.

Common UTP Applications

• Office networks and standard business applications (computers, printers, VoIP phones)
• Home networks requiring reliable gigabit connectivity
• Commercial buildings with moderate interference levels
• Power over Ethernet (PoE) deployments for security cameras and wireless access points
• Any environment where cost-effectiveness and ease of installation matter most

For the vast majority of office environments, UTP is the right choice. Businesses that partner with a managed IT services provider in the Chicago area often find UTP already standardized across their infrastructure, an easy foundation to build on as needs grow.

3. Shielded Twisted Pair (STP): Extra Protection for Demanding Environments

STP cables add metal foil or braided shielding around twisted pairs, like wrapping UTP cables in aluminum foil. Some cables shield each individual pair and then wrap all four pairs together (referred to as double-shielded or S/FTP). This extra layer blocks interference from motors, heavy machinery, fluorescent lighting, and other sources of electromagnetic noise.

The trade-off is cost and complexity. STP cables are more expensive than UTP, require proper grounding to function correctly, and are thicker and less flexible, making installation more labor-intensive. Important: Improperly grounded STP can actually perform worse than UTP, as the ungrounded shield acts as an antenna that attracts interference rather than deflecting it. However, in environments with significant electrical interference, a properly installed STP system pays for itself in network reliability.

In demanding industrial and commercial environments, STP is typically the right choice for:

• Manufacturing plants and factories with heavy machinery
• Hospitals and medical facilities with sensitive imaging equipment
• Industrial facilities with variable frequency drives and large motors
• Data centers requiring 10 Gbps Ethernet over the full 100-meter distance

4. Fiber Optic Cables: The Fastest Network Solution

Fiber optic cables send light pulses through glass or plastic strands instead of electrical signals through copper. At the core of each cable is a narrow glass core surrounded by multiple protective layers, including plastic coating and kevlar fibers that prevent bending damage and signal loss. This fundamental difference delivers three major advantages: the fastest speeds of any cable type (up to 400 Gbps), the longest transmission distances of any network cable, and complete immunity to electromagnetic interference.

Which of the four types of network cable is capable of transferring data up to 100 Gbps? Fiber optic cable is the only type that supports speeds of 100 Gbps and beyond. While Cat8 copper cable can reach 40 Gbps, fiber optic remains unmatched for high-speed, long-distance data transmission.

Fiber comes in two varieties:

• Single-mode fiber (SMF): Narrow glass core (8–10.5 microns) carries a single light beam over very long distances, up to 40 km at 10 Gbps, and 10 km at 100 Gbps. Best for building-to-building connections, ISP backbone runs, and metro-area networks.
• Multi-mode fiber (MMF): Larger core (50–100 microns) supports shorter runs (typically 100–550 meters at 10–100 Gbps) at lower cost. Multi-mode uses multiple light paths simultaneously, which introduces modal dispersion and limits maximum distance compared to single-mode — but within those limits, it is the standard choice for in-building backbone runs, floor-to-floor connections, and data center switch-to-switch links.

One practical consideration: fiber optic cables cannot carry electrical power, so they do not support Power over Ethernet (PoE). If you need to power devices like security cameras or wireless access points at the cable endpoint, you will still need a copper run or a separate power source.

While fiber optic cables cost more than the other types of network cables, the price gap has narrowed significantly. For any new construction or major renovation, running fiber for backbone connections is increasingly the standard recommendation.

Planning a Fiber Optic Installation

Fiber installation is a different undertaking than running UTP. The cables are sensitive to bending radius, require precise alignment at splice and termination points, and must be tested with optical power meters and OTDR equipment to verify signal integrity end-to-end. Unlike Cat6 runs that many experienced IT teams handle in-house, fiber work is typically handled by certified cabling contractors who carry the right splicing equipment and testing tools.

For businesses planning a fiber deployment, the key decisions are: single-mode versus multi-mode based on distance requirements, indoor versus outdoor-rated jacket for any runs that exit the building, and whether to use pre-terminated cassettes (faster, cleaner) or field-terminated connectors (more flexible for custom lengths). A proper site survey before installation — mapping routes, measuring distances, and identifying any conduit constraints — prevents the most common and costly mistakes.

Ethernet Cable Categories Explained: Cat5e Through Cat8

Within the twisted pair cable family (both UTP and STP), cables are organized into categories defined by the TIA/EIA-568 standard. Each category specifies maximum data rate, bandwidth, and cable length — the three variables that determine which Ethernet standards a cable can support. Here is how the current categories compare:

Which Category Should Your Business Choose?

Cat5e remains adequate for basic networking where speeds will not exceed 1 Gbps. However, with the decreasing price gap between Cat5e and Cat6, there is diminishing reason to install Cat5e in new projects.

Cat6 is the current standard for most office installations. It supports gigabit speeds comfortably and can handle 10 Gbps over shorter runs (up to 55 meters), making it suitable for most small-to-medium business environments.

Cat6a is the recommended choice for any new installation where future-proofing matters. It supports 10 Gbps over the full 100-meter distance and provides the bandwidth headroom needed for Wi-Fi 7 backhaul, 4K/8K video, and cloud-heavy workloads. The labor cost to install Cat6a is the same as Cat5e, only the materials cost differs, so the long-term value strongly favors Cat6a.

Cat7 and Cat8 are specialty cables. Cat7 uses non-standard connectors (GG45 or TERA instead of RJ-45), limiting its compatibility with standard networking equipment. Cat8 supports extraordinary speeds but only over 30 meters, restricting it to data center use. Neither is recommended for general office cabling.

Gigabit Ethernet in Practice

Gigabit Ethernet, the 1 Gbps standard supported by Cat5e, Cat6, and Cat6a, is the baseline for any modern business network. What that means practically: every connected device, from desktop computers to VoIP phones to wireless access points, should have a dedicated gigabit-capable drop. PoE switches, which power access points and IP cameras over the same cable that carries data, require Cat5e minimum and Cat6 or better for reliable 4K camera feeds or Wi-Fi 6/7 access points drawing higher wattage.

For most SMBs, the move from gigabit to 10-gigabit matters most at the switch uplink level, the connections between access layer switches and core switches, rather than at the desktop. Running Cat6a for all horizontal cables ensures that when switch infrastructure is upgraded to support 10G uplinks, the cabling can carry it without a full remediation project.

Which Type of Cable Is Most Commonly Used in Wired Networks?

Unshielded twisted pair (UTP) cable is by far the most commonly used cable type in wired networks today. Specifically, Cat5e and Cat6 UTP cables dominate both residential and commercial networking. UTP accounts for the vast majority of new structured cabling installations worldwide because of its:

• Low cost compared to shielded or fiber alternatives
• Ease of termination with standard RJ-45 connectors
• Flexibility during installation (routes easily through walls and ceilings)
• Sufficient performance for gigabit and even 10-gigabit Ethernet

For businesses specifically, Cat6 UTP has become the de facto standard for new horizontal cable runs, with Cat6a gaining rapid adoption in enterprise and high-performance environments.

Network Cable Color Coding

Inside every twisted pair Ethernet cable, the eight wires are organized into four color-coded pairs following the TIA/EIA-568 standard:

• Pair 1: Blue and white/blue
• Pair 2: Orange and white/orange
• Pair 3: Green and white/green
• Pair 4: Brown and white/brown

Two wiring standards exist for RJ-45 termination: T568A and T568B. The T568B standard is more common in commercial installations in the United States. The key difference is the position of the orange and green pairs. Whichever standard you choose, consistency across your entire installation is critical.

The outer jacket color of network cables has no official standard meaning, though common conventions exist:

• Blue — general data
• Yellow — Power over Ethernet (PoE)
• Red — mission-critical connections
• Green — VoIP or analog lines

Always check the printed text on the cable jacket for the actual category rating, color alone never proves a cable’s category.

How Different Cable Types Work Together

Real-world business networks rarely rely on a single cable type. Understanding how coaxial, UTP, STP, and fiber optic cables each fit into a complete infrastructure helps when planning new installations or evaluating existing ones.

A typical multi-floor commercial building uses fiber optic cable for the backbone, the vertical runs between communications rooms on each floor, and any building-to-building connections on a campus. Fiber’s immunity to interference and its ability to cover distances well beyond the 100-meter copper limit make it the right choice for these long, high-throughput links.

From the communications room on each floor, UTP (usually Cat6 or Cat6a) handles the horizontal runs, the cables that go from patch panels out to individual workstations, conference rooms, and wall jacks. This is where the bulk of the cable in any building lives, and it’s where UTP’s cost and ease of installation make it the practical standard.

In areas with significant electrical equipment, a server room running large UPS systems, a manufacturing floor with motors and drives, or a medical imaging suite, STP replaces UTP for those specific runs. The rest of the building stays on UTP; only the sections near interference sources require shielding.

Coaxial typically enters the picture at the building’s ISP demarcation point, where the cable provider’s service terminates before being handed off to the internal network infrastructure. Legacy CCTV systems may also still run coaxial, coexisting alongside modern IP camera runs on UTP or fiber.

Understanding this layered approach, fiber backbone, UTP horizontal, STP where needed, coaxial at the edge, is the basis for any structured cabling design.

How to Choose the Right Network Cable for Your Business

Choosing the right cable comes down to four factors:

• Speed requirements — what your applications need today, and in the next 3–5 years
• Distance — how far your cable runs will travel between equipment and end devices
• Environment — the level of electromagnetic interference in your facility, including proximity to power lines, motors, and clusters of electronic equipment
• Budget — upfront material costs versus long-term performance and replacement risk

For a typical office with 20–100 employees: Cat6 UTP handles current needs. Cat6a UTP or STP is the better investment for any installation you expect to use for 5+ years.

For manufacturing, hospitals, or high-interference environments: Cat6a STP with proper grounding. The shielding prevents interference from degrading your network performance.

For building-to-building connections or data center backbone: Single-mode fiber for distances over 100 meters. Multi-mode fiber for shorter runs where cost sensitivity is a factor.

For a data center with switch-to-switch links under 30 meters: Cat8 or multi-mode fiber, depending on the speed tier required.

Frequently Asked Questions

What are the 4 types of network cable?

The four types are coaxial, unshielded twisted pair (UTP), shielded twisted pair (STP), and fiber optic. UTP is the most widely used for everyday networking, while fiber optic offers the highest performance for demanding applications.

Which type of network cable consists of 4 pairs of twisted wires?

Both UTP and STP Ethernet cables consist of four pairs of twisted wires (eight wires total). Each pair is twisted at a different rate to minimize crosstalk and electromagnetic interference. The most common examples are Cat5e, Cat6, and Cat6a cables, all terminated with RJ-45 connectors.

Which type of cable is most commonly used in wired networks?

Unshielded twisted pair (UTP) is the most common cable in wired networks. Specifically, Cat5e and Cat6 UTP cables are the most widely installed globally due to their balance of performance, cost, and ease of installation.

Which type of conductor wire is typically used for cables that run behind walls or through ducts?

Solid-core conductor cable is the standard for permanent installations behind walls, in conduits, and through ducts. Solid conductors have lower attenuation and are easier to punch down to patch panels. Stranded conductor cable is used for short patch cables where flexibility is needed.

Which of the four types of network media is capable of transferring data up to 100 Gbps?

Fiber optic cable is the only type of the four main network cables that supports speeds up to 100 Gbps and beyond. Single-mode fiber can carry 400 Gbps over distances up to 10 kilometers, far exceeding the capabilities of any copper-based cable.

What is the difference between Cat5e and Cat6?

Cat5e supports speeds up to 1 Gbps at 100 MHz bandwidth. Cat6 supports the same 1 Gbps at 100 meters but can also handle 10 Gbps over distances up to 55 meters, with 250 MHz bandwidth. Cat6 features tighter twisting and often includes a plastic spline separator to reduce crosstalk. For new installations, Cat6 or Cat6a is recommended over Cat5e.

Do I need STP or UTP cable for my office?

For most office environments, UTP cable is sufficient. STP is only necessary when your cables will run near significant sources of electromagnetic interference, such as heavy machinery, large motors, or medical imaging equipment. STP also requires proper grounding to be effective, improperly grounded STP can actually perform worse than UTP.

Get Expert Help with Your Network Cabling

Understanding the four types of network cables is the first step, but implementation matters just as much as selection. Even the right cable, poorly installed, leads to intermittent connectivity, slow speeds, and expensive troubleshooting down the line.

LeadingIT works through vendors to provide structured cabling services across the Chicago metropolitan area, including network design, cable installation, testing, and certification. As a managed IT services provider, we help businesses select, install, and maintain the right cabling infrastructure for their current needs and future growth.

Ready to upgrade your network? Contact LeadingIT at 815-788-6041 or book a call to discuss your cabling needs.