Shruti Speak's

Web Server A Web Server can be defined as software that enables computer to deliver web pages written in html to client machine. Capabilities provided by a web server are: 1.        Security services 2.        FTP(File Transfer Protocol) 3.        Data capturing(Logs are maintained in web server) 1 Web server plays two roles static and dynamic. 1.        Static : A static web page is one that has been written once, like a word processing document, and then saved onto the web server. Static pages are created using tools like HTML, JavaScript, CSS and images.  2.         Dynamic : A dynamic web page is created on the fly. It doesn’t actually exist on the web server until a web browser requests it. When a request is made, web server runs whatever program will create the web page. That program creates the page dynamically and returns it to the web server, which then passes it along to the web browser. Eg: Xamp server is required for PHP a)       First php page is

TCP-IP Model Layers of TCP-IP Reference Model Application Transport Network/Internet Protocol Host to network Host to network Interface Layer: This layer defines the protocols & hardware request to deliver data across physical network.   The term network interface layer refers to the fact that it defines how to connect the host computer which is not a part of the network, to the network. Ethernet is one example protocol at TCP/IP network layer. TCP/IP reference model does not really says much about what happens where, expect to point out that the host has to connect to the network using protocols so it can send up packets over it. Network/Internet Layer: This layer defines an official packet format and protocols called Internet Protocol(IP).   The job of this layer is to deliver IP packets where they are supposed to go. Packet routing is clearly the major issue at this layer and avoiding congestion.   For thes