Driving on the road, a good quality, beautiful phone holder for car will bring you a pleasant driving experience. Mobile phone holder is not harmful to mobile phones, there are three types of mobile phone holder in the market, sucker type, strong glue type and magnetic type. Suction cup is...

如何选择更合适的线缆？您需要了解线缆的基本信息，例如： 以太网类别 购买以太网线之前，请先查看标签、线材材质、绕线密度等信息。阅读以下指南后，选购会更加轻松。 1. 检查电线材料 所有线缆的外皮几乎相同，但内部材料却各不相同，包括纯铜线、铝线、铜包铝线、铜包铁线、铁线、混合线等等。这些线材之间有什么区别呢？1.1 纯铜线是最佳选择，电阻最小，是质量最好的线缆，适合PoE供电，电阻小可以避免传输过程中的电力损耗。1.2 铝线仅次于铜线，电阻稍大，短距离使用问题不大，适合家庭或小型办公室终端，或短距离PoE供电。1.3 铜包铝线是在铝线外镀一层铜。由于趋肤效应，铝线的导电性有所提高。由于电阻较大，不适合短距离PoE供电。1.4 铜包铁线是在铁线外镀一层铜，导电性有所提高，但电阻较大，不适合PoE供电。 1.5 铁芯线电阻较大，仅适用于短距离传输，不适用于PoE供电。1.6 混合线，部分线芯使用铜，部分线芯使用铝，仅适用于短距离使用，可用于PoE供电，但晶头制作必须严格按照线序进行，否则铜芯不能用于供电，会增加电阻，影响供电效果。 2. 检查网线标签 有几个 以太网类别 购买前您应该了解以下信息。2.1 CAT3 是三类线缆的标签。它用于 10M 带宽的网络，但几乎已被淘汰。2.2 CAT5 是五类线缆的标签。它用于 100M 带宽的网络。2.3 五类线, 是5e类线缆的标签。它用于155M带宽，是以太网类别中的主流。2.4 CAT6 适用于 5 类线缆，可用于 250M 带宽，用于搭建千兆以太网，这是未来的发展趋势。 3. 剪断并检查电线 需要移除缠绕在电线上的塑料薄膜，检查内部的四对线芯，同时观察这四对线芯的绕线密度。真正的五类/超五类线缆绕线密度适中，方向为逆时针。而假冒线缆的绕线密度通常较低，方向也可能是顺时针（可能性较小），这主要是因为假冒线缆生产简便，可以降低生产成本。

Under normal circumstances, the network is divided into five layers from top to bottom: application layer, transport layer, network layer, data link layer, physical layer. Each layer has its own rules to be observed. TCP / IP protocol is a group of the most commonly used network protocols. The lan...

Some time ago, Apple's mobile phone has been out of the 8th generation, but its Apple data cable has been using lightning interface, while Android phones use micro USB data cable and Type-C data cable as a charging cable. nexus 5x charging cable is a newly developed product in recent...

Many people pay more attention to smartphones, but not to their accessories, especially for its charging head and charging cable. I believe many people will have such an experience, cell phone charger or charging cable is broken, will easily buy a charging head, the price is cheap, but do you...

USB Type-C interface, the development of these two years is very fast, all the current laptops are beginning to use Type-C port, and many flagship phones are beginning to use Type-C interface. However, due to the different standards adopted by various companies, the design of mobile power supplies poses a...

The power of smartphones is getting bigger and bigger, charging at least once a day. And many users want to know whether the usb c phone charger can charge for other phones, I will explain in detail below, and lists a few major errors when charging. Surely there are a...

The continuous advancement of electronic technology has enabled the market for portable devices such as smartphones, pads, digital cameras, MP3 players and personal digital assistants (PDAs) to continue to grow rapidly and in greater numbers. In driving these technology products also led the development of its peripheral products. Usb charging...

If your mobile phone is well-known brand in general there will be no problem. But it must be very careful when buying some of its power supply. The reason is very simple, because there is no power supply even the best laptop can not bring you convenience, to know the...