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Comprehensive Tutorial of Cat5e vs Cat6 vs Cat6A vs Cat7

Author Derek

Date 12/18/2021

This is a comprehensive tutorial about everything you should know about Cat5e, Cat6, Cat6A, and Cat7. After reading, you will get a thorough understanding of these Ethernet cables, including their specification, performance, differences, and choosing methods.


The most commonly used twisted pair copper Ethernet cables include Cat5e, Cat6, Cat6A, and Cat7. Although fiber optic cables are increasingly used today, twisted pair copper Ethernet cabling still can't be replaced in many application areas. In practice, most network faults are caused by poor or unsuitable cabling systems. Therefore, choosing a suitable Ethernet cable is vital for your business or home networks. Then you must know what are the differences between Cat 5e vs Cat 6 vs Cat 6A vs Cat 7 and be clear that when to choose the right one for specific applications. I hope this article will help.

Introduction - Cat5e, Cat6/6A, Cat7


Cat5e Ethernet cable developed from Cat5 cable by mitigating crosstalk and has mostly displaced Cat5 in today's application. It features an unshielded twisted pair structure and provides a bandwidth performance of up to 100 MHz. 


Ethernet Cat5e cable is commonly applied in 1000BASE-T Gigabit Ethernet speeds by using four wire pairs. Cat5e cable supports distances up to 100 meters in 1 Gigabit Ethernet connection by working with 1000BASE-T SFP+ transceivers.


1000BASE-T link on Cat5e:



Cat6 is also an unshielded twisted pair cable, which has a better bandwidth performance of up to 250 MHz, compared to 100 MHz for Cat 5e. Also, it complies with a more strict specification standard in crosstalk and system noise than Cat5e cable.


Cat6A (Augmented Cat6) was defined by TIA (Telecommunications Industry Association). The bandwidth of Cat6A is up to 500 MHz, which is twice that of Cat 6. Furthermore, Cat 6A has improved alien crosstalk as compared to Cat 6.


Cat6 supports the max distance up to 100 meters in 10/100/1000BASE-T applications. When used for the 10 Gigabit Ethernet 10GBASE-T application, Cat6 has a limited distance of 55 meters while Cat6a allows for 100 meters. QSFPTEK provides 10GBASE-T modules with specifications of 30 meters and 100 meters.


10GBASE-T link on Cat6A:


Cat 7 Ethernet cable features an individual shielding per pair structure different from unshielded Cat5/5e/6. The advantages of Cat7 aim at the better performance of EMI and crosstalk protection, especially in high-speed rate transmission systems.

Cat 7 Ethernet cable has a high bandwidth of up to 600 MHz. It terminates GG45 or TERA connectors, whereas Cat5/5e/6 uses the traditional Rj45 connectors.


It should be noticed that Cat7 is not recognized by the TIA/EIA. So the compatibility issue must be paid enough attention to when you select Cat7 for your network infrastructure.

Cat5e vs Cat6 vs Cat6a vs Cat7

Differences Between Cat 5e vs Cat 6 vs Cat 6A vs Cat 7

Speed, Distance, Bandwidth

The wider the bandwidth, the higher the transmission speed. Both Cat5e, Cat6, and Cat6A Ethernet cable support 1 Gigabit 1000BASE-T network transmission speeds up to 100 meters distance, however, as the bandwidth of Cat6 and Cat6A is much higher than Cat5e Ethernet cable, coming to the result that Cat6 and Cat6a wiring allows a faster speed up to 10GBASE network transmission. When operating at up to 10Gbps, Cat6 allows for maximum lengths of 55 meters, while Cat6A supports up to 100 meters. Therefore, Cat6 and Cat6A definitely significantly outperformed Cat5e. 


Cat5e - Up to 1Gbps speed,100 MHz bandwidth, 100 meters distance.

Cat6 - Up to 10Gbps speed, 250 MHz bandwidth, 55 meters distance.

Cat6A - Up to 10Gbps speed, 500 MHz bandwidth, 100 meters distance.

Cat7 - Up to 10Gbps speed, 600 MHz bandwidth, 100 meters distance.


Unshielded or Shield

Cat5e and Cat6 Ethernet cables are characteristic of an unshielded twisted pair structure (UTP), whereas Cat6A and Cat7 adopt a shield foil twisted pair structure (SFTP). The major difference between these two types of structures is if using shield protection, which results in the performance differences in EMI and crosstalk. Cat6A and Cat7 enjoy better protection from EMI and crosstalk compared to Cat5e and Cat6. However, it leads to a relatively higher cost and a thicker wire diameter. So although Cat5e and Cat6 are not as good as Cat7 in the performance of againsting EMI and crosswalk, they get the advantages in low cost and easy deployment.


Unshielded Twisted Pair (UTP) vs Shield Foil Twisted Pair (SFTP)


Cat5e vs Cat6 vs Cat6A vs Cat7 Specification


Cable Type








Unshielded twisted pair

100 MHz






Unshielded twisted pair 

250 MHz






Shield foil twisted pair

500 MHz





Shield foil twisted pair

600 MHz







Compatibility Between Cat5e, Cat6/6A, Cat7

TIA requires that Cat6 must be backward compatible with Cat5e, Cat5, and Cat3 to ensure any lower-level cabling systems fully support the Cat6 cabling system. When different levels of cables are mixed with Cat6, the final transmission will reach the minimum performance requirements.


As for Cat7, it complies with ISO standard, instead of TIA standard and it is a shielded cable with newer connectors of GG45 or TERA instead of Rj45 connectors, so Cat7 is not backward compatible with Cat5/5e/6.




Future: Cat5e or Cat6 or Cat6A

Today's requirements for transmission quality are ever-growing. Cat6 and Cat6A cable systems not only provide a higher speed and bandwidth but also significantly improves the service quality of your digital voice and video applications applied to desktops. The cabling system is the lifeblood of the whole network infrastructure, which can be considered as a long-term investment asset. And besides, the price differences are quite small among Cat5e, Cat6, and Cat6A. Therefore, choosing a high-quality Cat6/Cat6A cabling system is a wise selection. 


Since the Cat6 and Cat6A cables are entirely backward compatible with Cat5e, Cat5, and Cat3 cables, even if you can't get the full speed of Cat6 because of your current network device, you can still use the cables. They'll just operate at the current slow rate. However, once you upgrade your network to a higher speed, your Cat6 orCat6a wiring will seamlessly operate on your upgraded network system. What should I choose between Cat5e or Cat6 or Cat6A? Is Cat6 better than cat5e? The answer is definitely, if you want future proof of your network, choose Cat6 or Cat6A!



Cat7 may not be recommended for now, Why?

High bandwidth up to 600 MHz, transmission speed up to 10GGbps at the maximum length of 100m. It seems everything sounds great about Cat7. However, here comes the issue of Cat7 - compatibility.


Firstly, it doesn't comply with the common TIA/EIA standards, which means the Cat7 cables you bought may be different from manufacturer to manufacturer. Secondly, Cat7 cables use a new connector of GG45 or TERA, instead of the traditional RJ45 connectors like Cat5e/Cat6/Cat6A, so it can't be fully backward compatible with your previous Cat5/Cat5e cabling systems.


What’s more, the spec performance of Cat7 provided is nearly equivalent to the later introduced Cat6A. The major difference between Cat6A and Cat7 is that Cat 7 structures with four individually shielded twisted copper pairs and an overall cable shield, which helps it meet a better performance against crosstalk and EMI than Cat6A. However, Cat6A is a TIA standard and has the advantage of full backward compatibility. Therefore, If you need the performance like Cat7 offers, Cat6A is more recommended.



What needs to be confirmed when choosing an Ethernet cable?


- Confirm the compatibility of your network device (switches, network cards) with the cable.

- Confirm if the cable manufacturing is in strict accordance with international standard protocols.

- Confirm if there is enough transmission margin in your cabling system in case of future network upgrades.

- Confirm the connectivity distance between your network devices. For example, if you need a more than 55 meters’ transmission distance at 10 Gbps speed. Cat6A should be chosen instead of Cat6. However, for a short connection of home network or office network, Cat6 cables are sufficient.


QSFPTEK provides high-quality Ethernet cables and optical fiber cables which are fully compliant with international standards. Welcome to consult via sales@qsfptek.com.


Learn more about optical fiber cables:

Five Differences Between OM3 vs OM4 Fiber

OM1 OM2 OM3 OM4 OM5 Multimode Fiber Types: What’s the Difference?

The Ultimate Guide to Choose Between OS1 and OS2



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