Why can't network cables be connected directly?

The reasons why network cables cannot be directly connected are cable type mismatch, signal interference, interface mismatch and network topology, etc. Detailed introduction: 1. Cable types do not match. Network cables are divided into different types, such as Cat5, Cat6, fiber optic, etc. Different types of network cables have different physical characteristics and transmission capabilities. If two network cables are directly connected, it may cause cable failure. The cable types do not match and data cannot be transmitted normally; 2. Signal interference. When the network cable transmits data, it will be transmitted wire-to-wire in the cable. If two network cables are directly connected, the signals may interfere with each other, etc.

Network cables are an important part of computer networks used to transmit data, also called Ethernet cables. The main reasons why network cables cannot be directly connected are as follows:

1. Cable types do not match:

Network cables are divided into different types, such as Cat5, Cat6, optical fiber, etc. Different types of network cables have different physical characteristics and transmission capabilities. If two network cables are directly connected, the cable types may not match and data cannot be transmitted normally.

2. Signal interference:

When the network cable transmits data, it will be transmitted wire-to-wire in the cable. If two network cables are directly connected, the signals may interfere with each other, resulting in data transmission errors, speed reduction or loss.

3. Interface mismatch:

Network cables usually use RJ-45 interfaces for connection, while computers or network devices usually use RJ-45 interfaces or other types of interfaces. If you directly connect two network cables, there may be a problem of interface mismatch and it will be impossible to connect or transmit data correctly.

4. Network topology:

Computer networks usually adopt specific topologies, such as star, bus, ring, etc. Every computer or network device is connected and communicates through a central device such as a switch or router. Directly connecting two network cables violates the principles of network topology and may cause the network to fail to work properly.

In order to correctly connect the network cable and achieve data transmission, the following measures should be taken:

1. Use an appropriate connector:

Use an appropriate connector to connect the network cable to the computer or network equipment. Common connectors include RJ-45 (for network cable connection), USB (for computer device connection), etc. Make sure the connector matches the device's interface.

2. Use a central device:

Connect and manage network cables by using a switch, router, or network center device. These devices have multiple ports that allow multiple computers or network devices to be connected to the same network.

3. Follow the network topology:

According to the principles of network topology, connect the computer or network device to the central device to form a suitable network structure. This helps ensure network stability and performance.

4. Use appropriate cables:

Choose the appropriate type of network cable based on your network needs and requirements. For example, for long-distance transmission or high-speed data transmission, you can choose high-performance cables such as Cat6 or optical fiber

To summarize, network cables cannot be directly connected because of mismatched cable types, signal interference, mismatched interfaces, and network topology and other reasons. In order to properly connect and transmit data, appropriate connectors, central devices and cables should be used and the appropriate network topology should be followed. This ensures network stability and performance for efficient data transmission and communication.

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