Understanding The Distinction: UTP Vs STP

Understanding the distinction between UTP and STP is important for network design. STP cables feature an extra foil or copper knitting cover to help prevent alien crosstalk and electromagnetic interference.

However, this added protection comes with a price. Shielded twisted pair cables are more expensive and require additional materials to install.


UTP is the better option if you want to keep your network cost-effective. While it may not offer as much protection against electromagnetic interference, it still meets the CISPR 22/EN5022 requirements and will work well in most environments.

Since UTP doesn’t have a metal shield, it costs less to manufacture and install. This makes it the most popular choice for residential and small business networks. UTP offers more versatility, as it can be installed in buildings with unshielded wiring. However, the lack of a shield can be problematic in environments highly prone to interference, such as industrial settings or buildings with a lot of electrical equipment.

The metal shield of STP cables protects the wires from electromagnetic interference, enhancing dependability and boosting data transmission speeds. This is particularly helpful in buildings with microwave equipment or other sources of interference, and it greatly reduces crosstalk – the signal from one wire crossing into other adjacent wires.

The difference between UTP and STP is that STP requires more maintenance than UTP and is usually more expensive. Still, it performs best in high-bandwidth applications and industrial environments. Generally, it’s best to use STP for data transmission in professional situations when you need higher reliability and protection against electromagnetic interference. Otherwise, you can safely use UTP for most home networking applications.


The reliable data transmission distance of UTP cables is restricted, and the wires are vulnerable to electromagnetic interference. This type of interference, called electromagnetic induction, can be caused by motors, light ballasts, radio transmitters, and more. It can disrupt a signal, causing the information to become corrupted and unusable.

Although the twisted nature of UTP wires protects them from crosstalk to some extent, it is not enough to compensate for their lack of shielding. That makes UTP cables less ideal for professional environments and susceptible applications.

Fortunately, some UTP cables offer the benefits of STP cables without all the extra metallic material. These cables, often referred to as FTP (Foiled Twisted Pair) or S/FTP (Shielded and Foiled Twisted Pair), are designed with individual foil wraps that separate each of the eight wires in the cable into its distinct twisted pair.


The decision to use UTP or STP cables depends on the environment in which they will be used. While most networking equipment is compatible with both cable types, some environments have higher risks of interference that may necessitate shielded cables. For instance, the shielding in STP cables helps to reduce crosstalk and electromagnetic interference that power lines, microwave equipment, and radio transmitters can cause.

UTP cables do not have shielding, but they offer several other advantages that make them suitable for networking in most environments. These benefits include cost, flexibility, and versatility. UTP cables are typically less expensive than STP cables and can be used for wire segments up to 100 meters long. UTP cables also have more flexible construction and are easier to work with than STP cables.

Although unshielded twisted pair cables are more affordable and accessible to install, they can still be susceptible to interference from other electrical devices. The twisting of the pairs does not eliminate this problem, but it does help to reduce crosstalk between wires. In addition, UTP wiring does not require complete system bonding.

While STP cabling systems provide superior performance, they incur higher installation costs. The cable and shielded connective hardware are more costly than their unshielded counterparts. Furthermore, it takes longer to terminate jack modules and adequately bond the STP cabling system.


Unshielded wiring doesn’t need to be grounded like shielded cables, making installing it simpler and faster. However, unshielded wires must be properly installed to avoid a condition called crosstalk. This is when signals from one cable are picked up by other cables in the same cabling system, causing errors or noise.

This problem is caused by the fact that twisted pairs of copper wires are close together and can pick up electromagnetic interference from nearby sources such as electric transformers or motors. These interference sources produce electromagnetic fields that can be inducted into metallic conductors. The interference can then disturb data signals, reducing speeds and increasing attenuation.

Using UTP cabling with standard patch panels and jacks can reduce this problem. Still, a proper network design will consider the specifics of the environment in which the network is being installed. This is why evaluating all potential interference sources is essential before deciding which type of cabling to use for each network run.

STP cables take the concepts of UTP and go a step further. They’re designed to protect against interference by combining the techniques of shielding, canceling, and wire twisting. This provides superior performance over UTP but is also more expensive because of the extra shielding material. In addition, you’ll need to purchase special termination connectors and specialized hardware to ensure the cabling performs optimally.


Gary is a lifestyle writer with a passion for healthy living, fitness, and self-improvement. His writing is dedicated to helping readers achieve their best selves through practical tips and advice.