zs12344444的专栏

What is a Trunk?You can’t describe VLANs without mentioning  trunks. It’s a known fact that You can control and segment network broadcasts with VLAN , VLAN trunking enables the movement of traffic

云计算带来的颠覆并不局限于SaaS （Software as a service）它还包括“   基础架构即服务（IaaS）”   和“   平台即服务（PaaS）”其实很简单，云计算的落地方式主要有三种，即：SaaS，Software-as-a-Service软件即服务；PaaS，Plartform-as-a-Service平台即服务；IaaS,Infrastructure-as

Up and down; east and west; black and white; yin and yang. Well, you get the idea. Each request message sent by an HTTP client to a server prompts the server to send back aresponse message. Actually,

Common MethodsEach method allows the client to specify a particular type of action to be taken by the server. Method names are always in upper case letters. There are three methods that are commonly

HTTP/0.9 and HTTP/1.0 only supported transitory connections between an HTTP client and server, where just a single request and response could be exchanged on a TCP connection. This is very inefficient

206 Status Code ExplainedA status code of 206 is a response to a request for part of a document. This is used by advanced caching tools, when a user agent requests only a small part of a page, a

he Hypertext Transfer Protocol is the application-layer protocol that implements the World Wide Web. While the Web itself has many different facets, HTTP is only concerned with one basic function: the

192.168.188.8 - - [13/Dec/2012:01:21:15 +0000] "GET /" 302 193 "-" "-"The HTTP response status code 302 Found is a common way of performing a redirection.An HTTP response with this status

HTTP Proxy Servers and Proxying(Page 1 of 3)In my overview of the HTTP operational model, I described how HTTP was designed to support not just communication between a client and server, but als

“高可用性”（High Availability）通常来描述一个系统经过专门的设计，从而减少停工时间，而保持其服务的高度可用性。计算机的高可用性　　计算机系统的可靠性用平均无故障时间（MTTF）来度量，即计算机系统平均能够正常运行多长时间，才发生一次故障。系统的可靠性越高，平均无故障时间越长。可维护性用平均维修时间（MTTR）来度量，即系统发生故障后维修和重新恢复正常运行平

ARP是地址转换协议（Address Resolution Protocol）的英文缩写，它是一个链路层协议，工作在OSI模型的第二层，在本层和硬件接口间进行联系，同时对上层（网络层）提供服务。    二层的以太网交换设备并不能识别32位的IP地址，它们是以48位以太网地址（就是我们常说的MAC地址）传输以太网数据包的。也就是说IP数据包在局域网内部传输时并不是靠IP地址而是靠MAC地址来识别

DMZ是英文“demilitarized zone”的缩写，中文名称为“隔离区”，也称“非军事化区”。它是为了解决安装防火墙后外部网络不能访问内部网络服务器的问题，而设立的一个非安全系统与安全系统之间的缓冲区，这个缓冲区位于企业内部网络和外部网络之间的小网络区域内，在这个小网络区域内可以放置一些必须公开的服务器设施，如企业Web服务器、FTP服务器和论坛等。另一方面，通过这样一个DMZ区域，更加有

TM has been seen as the ultimate networking technology that will allow true broadband networking for the future. At the time ATM was introduced, it was generally estimated that it is just a matter o