Simple Network Test Gadget ----- Network Testing

Simple Network Test Gadgets, Network Testing Keywords: Simple Network Test Gadget Simple network test gadget Nowadays and family computers are popularized in the Internet, ADSL and LAN broadband gradually integrate people's daily work and life. However, there is no more troublesome faults, where is it? Is there any fault? Machine, software or network? Here you introduce a small size, simple production, and only spend very little money can be made. tool. According to the connection specification of the network interface, the RJ45 port on the network card, the switch / including the hub, the router is connected by the two RJ45 crystal heads of the network cable. The physical failure of any part will cause the network. Now let's take a look at the structure of the RJ45 crystal head. There are 8 metal pins on the crystal head, and 4 of them are actually used in accordance with the specification, namely Pin1, PIN2, PIN3, and PIN6. PIN1, PIN2 is a pair, PIN3, PIN6 is a pair, one of the pairs of corresponding signals, and the other pair of corresponding signals are transmitted. Therefore, we can connect it to a crystal head to connect its PIN1 and PIN3, connect its PIN2 and PIN6, as shown in Figure 1. In this way, the signal constitutes a closed loop, and the simple network test gadget is completed, and the physical object is shown in Figure 2. Be When you can't internet access, just insert this crystal head gadget into the network card behind your computer, if the network card indicator lights up, you can judge the NIC normal; then insert this crystal head gadget into the switch (including hub, router), if The switch (including the hub, the router) lights up, and it can be judged that the switch (including the hub, the router) is normal, then the fault is definitely in the network cable. If the status indicator on the network or switch (including the hub, the router) is not lit, it can be determined that the NIC or switch (including the hub, the router) is faulty.

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