At the moment when the Internet speed is slow, the game is offline, and the video conference is stuck, you are wondering whether it is the pot of the router or the broadband is not awesome?
But in fact, it is also possible that the Ethernet cable was not selected correctly.
In the network signal transmission link, the Ethernet cable is the most easily overlooked link. But the Ethernet cable is the bridge connecting various devices, and if the Ethernet cable is not chosen properly, it will also affect the network data transmission speed of the devices at both ends.
For example, if the router is 1000Mbps and the broadband is 500Mbps, and the Ethernet cable used is 100Mbps, the final network speed will only be 100Mbps.
Phân loại cáp Ethernet
At present, the network cables on the market are mainly divided into: Category 5e, Category 6, Category 6a, Category 7, and Category 8. Category 5 and earlier network cables have gradually been phased out by the market due to their low data transmission rates, which cannot meet the requirements of household and industrial use.
| Kiểu | Tốc độ truyền | Frequency Bandwidth | Transmission Distance | Conductor Diameter | Loại che chắn |
|---|---|---|---|---|---|
| Cat5e | 1000 Mbps | 100 MHz | 100 m | 0.51 mm | Shielded/Unshielded |
| Cat6 | 1000 Mbps | 250 MHz | 100 m | 0.57 mm | Shielded/Unshielded |
| Cat6a | 10 Gbps | 500 MHz | 100 m | 0.57 mm | Shielded/Unshielded |
| Cat7 | 10 Gbps | 600 MHz | 100 m | 0.58 mm | Double-shielded |
| Cat8 | 25/40 Gbps | 2000 MHz | 30 m | 0.62 mm | Double-shielded |
The outer side of the network cable is marked with CAT5E, with a maximum transmission frequency of 100MHz. It can meet a transmission rate of 1000Mbps within 100 meters and is suitable for gigabit networks.
The outer side of the network cable is marked with CAT6, with a maximum transmission frequency of 250MHz. It can meet a transmission rate of 1000Mbps within 100 meters and is suitable for gigabit networks. In order to better reduce crosstalk, most Category 6 cables have added a cross insulation skeleton, and compared to Category 5e, Category 6 cables have larger core diameters, longer stable transmission distances, and better performance. Qualified Category 6 cables can support 10 Gigabit networks within 55 meters.
The outer side of the network cable is marked with CAT6A, with a maximum transmission frequency of 500MHz and a maximum transmission rate of 10Gbps within 100 meters, supporting 10 Gigabit networks.
Category 5e cables are CAT5E, Category 5e cables are CAT6A, and some Cáp Ethernet công nghiệp labeled as CAT6E do not belong to the standard cable category, and their transmission performance cannot be guaranteed.
The outer side of the network cable is marked with CAT7, with a maximum transmission frequency of 600MHz and a maximum transmission rate of 10Gbps within 100 meters, supporting 10 Gigabit networks. Category 7 network cables are now mandated to add dual shielding to better combat signal attenuation and crosstalk.
Category 8 Ethernet cable
The outer side of the network cable is marked with CAT8, with a 2000MHz ultra-high bandwidth and a maximum transmission rate of 40Gbps, but only within a transmission distance of 30 meters. Therefore, it is generally used for connecting devices such as servers, switches, and distribution frames over short distances.
Classification of shielding Ethernet cables
The types of network cables mentioned above are all twisted pair cables, which are formed by winding a pair of insulated wires counterclockwise around each other. This interlocking method can reduce signal interference, and the denser the wire winding, the stronger its anti-interference ability.
In order to further enhance anti-interference capabilities, some cáp ethernet linh hoạt will also add shielding layers. Depending on whether they have shielding layers, Ethernet cables are divided into shielded twisted pair (STP) and unshielded twisted pair (UTP).
Shielded Twisted Pair (STP)
Shielded twisted pair refers to adding one or more layers of metal shielding within the insulation sheath. The metal shielding layer can reduce radiation and resist interference, not only shielding external electromagnetic signals, but also blocking the electromagnetic leakage of the cable itself. Therefore, twisted pair cables with shielding layers have higher signal transmission quality and good confidentiality performance. But the price of shielded wires is relatively high, and the installation process is also quite complicated.
The dual shielding mentioned earlier refers to each pair of wire cores having an independent shielding layer, and the outer layer sharing one or more shielding layers. Each pair of core wires has a layer of aluminum foil shielding to reduce signal attenuation and crosstalk; There is also a layer of metal braided shielding on the outer layer, which can reduce the interference of external magnetic fields and signals, and also increase the tension of the cable.
Unshielded twisted pair (UTP)
Unshielded twisted pair cables have only one layer of insulation rubber sheath wrapped around them and no metal shielding material. The characteristics are light weight, small overall wire diameter, easy bending, flexible networking, and relatively cheap price.
In summary, the higher the level of network cable, the better the material used, the larger the core diameter, and the more additional components (shielding layer, cross skeleton, etc.), the better the performance, but of course, the more expensive the price.