网络设备的选择网吧中用到的服务器和工作站一般是PC机,其采购已有很多文章作了介绍,Modem也有专门的介绍文章,下面仅介绍网络设备中的集线器、网卡和双绞线的采购,注意这里所说的网络产品都是以太网产品。 1、集线器集线器(HUB)的作用是根据与其相连的计算机的请求,选出某一端口的设备独占全部带宽,与集线器的上联设备或其他端口进行通信。集线器的种类很多,根据带宽区分有10M、100M、10/100M自适应等几种:根据外形尺寸来区分有机架式和桌面式两种;按扩展方式的不同有可堆叠、不可堆叠两种;按安装方式分有内、外置两种。带宽的选择在确定所需的集线器带宽时应考虑三方面的内容。(1)应用需求。一般来说,传输的内容不涉及语音、活动图像时,传输量相对较小,选10M集线器就够了。如果传输量较大,且涉及多媒体应用时应当选择100M The choice of network equipment Internet cafes used in the server and workstation are generally PC, the procurement has been a lot of articles were introduced, Modem also has a special introduction article, the following describes only the network equipment in the hub, network card and twisted pair procurement Note that the networking products mentioned here are all Ethernet products. 1, Hub Hub (Hub) is based on the request of the computer connected to it, select a device on a port exclusive bandwidth, with the hub uplink device or other port to communicate. There are many types of hubs. There are several types of 10M, 100M, 10 / 100M adaptive, etc. according to the bandwidth. There are two types of shelves and desktops, which are distinguished by the form factor. There are two types that can be stacked according to the expansion mode and can not be stacked ; According to the installation method is divided into internal and external two. Bandwidth Choices Three things to consider when determining the required hub bandwidth. (1) application requirements. In general, the transmission of content does not involve voice, moving images, the transmission is relatively small, choose 10M hub is enough. If the transmission is large, and when it comes to multimedia applications should choose 100M