What is a fiber optic network cable? The difference between optical fiber and network cable.

Fiber optics are a medium that transmits information from one end to the other. It is a piece of glass or plastic fiber that acts as a transmission medium for the passage of information.

Usually the terms "optical fiber" and "fiber optic cable" are confused. Most optical fibers must be covered by several layers of protective structure before use, and the covered cable is called a fiber optic cableThe protective structure of the outer layer of the optical fiber can prevent the surrounding environment from harming the optical fiber, such as water, fire, electric shock, etc.

Optical cables are divided into: optical fiber, buffer layer and coating. Fiber optics are similar to coaxial cables, except that there is no mesh shielding.

In the center is a glass core where light travels. In multimode fiber, the diameter of the core is 15 m to 50 m, which is roughly the thickness of a human hair. Whereas, the diameter of the single-mode fiber core is 8 m 10 m.

The outside of the core is surrounded by a glass envelope with a lower refractive index than the core to keep the fiber inside the core. Outside is a thin plastic jacket to protect the envelope. Optical fibers are usually bundled and protected by an outer shell.

The core is usually a double-layered concentric cylinder made of quartz glass with a small cross-sectional area, which is brittle and easy to break, so it needs an additional protective layer.

I suggest you go looking for it.

That is, in front of your station, the signal used is an optical signal, and the medium of transmission is not cable, but optical fiber.

Optical fiber is a medium in which quartz glass is made of 125 microns (about the same thickness as a hair) and a core (about 10 microns) is used to transmit optical signals. The core of the optical fiber is doped with germanium, and the refractive index is higher than that of the glass outside the core, so the optical signal can be fully reflected inside the core and can be transmitted over long distances.

In addition, fiber optics have a large enough bandwidth and are the ultimate choice for broadband networks.

The differences are as follows:

Ordinary network cables and optical fiber cables are different, mainly reflected in their different materials, the material of optical fiber cables is glass fiber, and the network cables are made of copper materials, which are more advanced than the materials used in optical fiber cables, which will affect the speed of production and transmission.

Today's network cables are basically Category 7 cables, and the propagation speed can reach 10Gbps, and the optical fiber network cable can reach more than twice the speed, and the propagation speed is faster.

On the other hand, the transmission distance is also different. According to the theory, the propagation distance of ordinary network cables can reach 100 meters, the maximum distance of optical fiber lines can reach 3 kilometers, and the normal range is between 300 and 500 meters. It can be seen that the rays of light travel farther.

Ordinary families generally choose a network cable is enough, you can connect a router, connect a laptop. Fiber optic cables are generally used in broadband communications, such as online interactive games or remote monitoring.

A network cable is a connection cable that connects a computer to a computer, and a computer to other network devices. Commonly used network cables are twisted pair cables and coaxial thin cables.

Using a thin coaxial cable for a network connection is relatively simple, as long as each computer or network device is connected in series, but it is more cumbersome to maintain, and if something goes down, the entire network can be paralyzed. If you add or remove a computer from the network, you must stop working on the network until the computer is added or removed before you can continue to use it. At the same time, this approach must be done in a bus-type topology, which is rarely used today.

A twisted pair consists of four stranded copper wires coated with insulating material and encased in an insulating sheath. It reduces interference caused by clutter and suppresses the attenuation of signals within the cable.

If you use a twisted pair, we can easily add or remove a computer from the network without interrupting the work of the network, and the maintenance of the network is relatively simple, if the network cable fails somewhere, it will only affect the computer or equipment connected to the twisted pair, and will not cause the network to be paralyzed. However, the use of twisted pair cables necessitates the addition of hubs or switches to the network, which increases the cost of the network.

1. The material is different;

Fibers are mostly fiberglass.

The network cable is copper:2 and the transmission speed is different.

The best Category 7 cable, its transmission frequency can reach at least 500 MHz, which is more than 2 times that of Category 6 and Category 6 cables, and the transmission rate can reach 10 Gbps.

Optical fiber is currently the fastest transmission medium, which can reach 40g-100g

3. The transmission distance is different.

The theoretical transmission distance of the network cable is only within 100 meters, while the optical fiber:

100BASE-FX single-mode module with single-mode fiber transmission 10-20 km 100BASE-FX multimode module with multimode fiber transmission 2 km 1000BASE-LX transmission with single-mode fiber transmission 5 km 1000BASE-LX transmission with multimode fiber (50um) transmission 550m1000BASE-LX with multimode fiber (transmission 550m1000BASE-SX with multimode fiber (50um) transmission 275M1000BASE-SX with multimode fiber ( 550M1000BASE-F: Using a pair of multimode or single-mode fibers, the distance between the computer and the hub can be up to 300-550m (500m) when using multimode fiber, and up to 3km when using single-mode fiber.

You got a concept wrong, we don't know whether the transmission speed of current and light is the same, but we don't look at this speed when we look at whether the speed is fast or not, but look at the capacity, that is, how much information can be transmitted per second, the capacity of ordinary network cable is about 10MB per second, and the information transmission capacity of ordinary single fiber should reach 40GB per second, that is, 40000MB per second! Other aspects are nothing more than environmental protection (the network cable is made of copper, the optical fiber is quartz sand, which is everywhere on the earth), light weight and other benefits.

Network cables transmit digital signals, while optical fibers transmit optical signals.

The effective propagation distance of the network cable is short, and there will be serious attenuation when it exceeds 100 meters.

Optical fiber cables, on the other hand, transmit large amounts of data, have fast speeds, and support long-distance transmission.

Of course, optical fiber is much faster than network cables, and generally optical fiber is only suitable for use in local area networks. A network that belongs to a shared network. Nowadays, there are a lot of optical fibers hanging on the outside, which is essentially a general network cable. This is what we usually call broadband, dial-up connection.

The optical fibers are stable at more than 10m, and the signal loss is small.

The network cables are too long, and the signal is not good.

Why does fiber optics replace network cables? What is the difference between them?

What is the difference between broadband and network cable.

The protocol is different depending on the transmission medium. The service effect is also different!

Summary. Differences: 1. The transmission rate of optical fiber and network cable is different

Optical fibers are transmitted by optical signals, and their transmission rate is tens of thousands of times faster than that of network cables; Network cables are transmitted by electrical signals, and their transmission rate is much slower than that of optical fiber. 2. The structure of optical fiber and network cable is different: optical fiber can be composed of multiple single-mode optical fibers and multi-mode optical fibers, and network cable is composed of four cables.

3. The application scenarios of optical fiber and network cable are different: due to its high-speed transmission characteristics, optical fiber is mainly used in high-speed transmission of data, such as network transmission, transmission of large files, etc.; The network cable is composed of four cables, which are mainly used in low-speed transmission, such as home network transmission, smart home, etc.

Hello, I want to pull a network cable from the company to the dormitory, about more than 200 meters, what equipment do I need?

Any good suggestions?

There are already switches on the company's side.

Differences: 1. The transmission rate of optical fiber and network cable is different: optical fiber is transmitted by optical signal, and its transmission rate is tens of thousands of times faster than that of network cable; Network cables are transmitted by electrical signals, and their transmission rate is much slower than that of optical fiber.

2. The structure of optical fiber and network cable is different: optical fiber can be composed of multiple single-mode optical fibers and multi-mode optical fibers, and network cable is composed of four cables. 3. The application scenarios of optical fiber and network cable are different

Due to its high-speed transmission characteristics, optical fiber is mainly used in high-speed data transmission, such as network transmission, transmission of large files, etc.; The network cable is composed of four cables, which are mainly used in low-speed transmission, such as home network transmission, smart home, etc.

To pull a network cable from the company to the dormitory, in addition to the network cable itself, the following equipment is also required:1Cable:

According to the length of the network cable, the wiring inside and outside the house, etc., cables of different materials can be selected, such as cable trays, ordinary cables, twisted pairs, etc.; 2.Cable termination: including various types of connectors, such as RJ45 connectors, plugs, connectors, etc.; 3.

Cable tray: used to fix network cables, such as tray pipes, tray belts, etc.; 4.Cable threader:

For wiring, such as wall feeders, hooks, etc.; 5.Network switches: used to connect networks, such as wired switches, wireless switches, etc.; 6.

It is used to configure networks, such as wired network cards, wireless network cards, switches, etc.

Okay, thank you. By the way, do I still use a network card when my company has a switch?

Yes, if you want to pull a network cable from the company to the dormitory, you need to use a network card, because the computer in the dormitory cannot be directly connected to the company's network cable, you need a switch to connect, and the switch also needs a network card to connect to the company's network cable, so that the computer can connect the dormitory and the company through the switch and network cable.

Because there are a lot of people in our dormitory, I'm not the only one.

Then you need a network card, kiss.

1. Different materials: the material of the optical fiber belongs to glass, the fiber is the abbreviation of optical fiber, which is used as a light conduction tool, and the principle of transmission is the total reflection of light. The network cable is childlike, mainly due to the difference between the three forms of materials of coaxial cable, optical cable and twisted pair, which also leads to the difference in the technical indicators of the two.

2. The transmission distance is different: under normal circumstances, the transmission distance of the network cable is within 100 meters, while the optical fiber can achieve 10 20km transmission, and even the multi-membrane optical fiber can also transmit information between 2km and 3km, which is far higher than the network cable.

3. Different functions: optical fiber is to accelerate the transmission of network information, and speed exists as an information transmission toolThe network cable is used to connect and split the equipment to ensure that the equipment is interconnected.

4. Different application scenarios: the network cable can provide users with data views, communications and other information, such as games, work meetings, etc. The network cable is mainly to connect devices, network connection devices, port connections, and so on.

5. The product characteristics are different: optical fiber is an abstract concept and the transmission rate of dynamic information, while the network cable is the carrier of information transmission and a physical medium.

6. Different ways of existence: optical fiber exists in a virtual way, while network cable is a real cable.

The above is that I have introduced to you the difference between network cable and optical fiber, I believe you have a certain understanding of this, I hope to help you.