Type of Web Servers
Types of Servers :-
- Mail Server: Mail Servers provides a centrally-located pool of disk space for network users to store and share various documents in the form of emails. Since, all the data is stored in one location, administrators need only backup files from one computer.
- Application Server: An application server acts as a set of components accessible to the software developer through an API defined by the platform itself. For Web applications, these components are usually performed in the same running environment as its web server(s), and their main job is to support the construction of dynamic pages.
- File Transfer Protocol (FTP) Server: FTP uses separate control and data connections between the client and the server. FTP users may authenticate themselves in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission username and password must be encrypted using FTP and SSL.
- Database Server: A database server is a computer program that provides database services to other computer programs or computers using client-server model. Database management systems frequently provide database server functionality, and some DBMSs (e.g., MySQL) depend on the client-server model for database access. Such a server is accessed either through a “front end” running on the user’s computer where the request is made or the “back end” where the request is served such as data analysis and storage.
- Domain Name System (DNS) Server: A name server is a computer server that hosts a network service for providing responses to queries. It maps a numeric identification or addressing component. This service is performed by the server in response to a network service protocol request.
The primary function of these DNS servers is the translation (resolution) of humanmemorable domain names and hostnames into the corresponding numeric Internet Protocol (IP) addresses. The secondary function of DNS is to recognize a name space of the Internet, used to identify and locate computer systems and resources on the Internet.
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Important Point :-
❖ The World Wide Web (WWW) is an internet based service, which uses common set of rules known as Protocols, to distribute documents across the Internet in a standard way.
❖ The Internet is a massive network of networks. It connects millions of computers together globally, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet.
❖ Search engines are the programs which are needed to extract the information from the internet.
❖ A search engine works in the following order: Web crawling, Indexing, Searching
❖ A web server commonly known as HTTP server or application server is a program that serves content using the HTTP protocol.
❖ A Web page can contain an article, or a single paragraph, photographs, and it is usually a combination of text and graphics.
❖ A browser is a software that lets you view web pages, graphics and the online content.
❖ The Secure Sockets Layer (SSL) is a protocol, uses Hypertext Transfer Protocol (HTTP) and Transport Control Protocol (TCP) for managing the security of a message transmission on the Internet.
❖ A blog is a web site like any other, but it is intended to offer personal opinions of people on their hobbies, interests, commentaries, photo blogs, etc.
❖ URL’s, or ‘uniform resource locators’, are the web browser addresses of internet pages and files. It is the way to locate a file or document on the Internet.
There are two types of URL: Absolute and Relative.
A protocol is a set of rules that governs the communication between computers on a network.
Basic internet Computer Questions and Answers
Q: What is the internet?
(a) a single network
(b) a vast collection of different networks
(c) interconnection of local area networks
(d) none of the mentioned
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Q: What is an ‘intranet’?
(a) Internal internet is used to transfer information internally
(b) Internal internet is used to transfer information to the outside company.
(c) Internal network designed to serve the internal formational needs of a single organization.
(d) Internal network designed to transfer information between two organizations
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Q: __ servers store and manage files for network users.
(a) Authentication
(b) Main
(c) Web
(d) File
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Q: ISP stands for
(a) Internet Security Protocol
(b) Intelligent Service Package
(c) Internet Service Provider
(d) Intelligent Service Provider
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Q: Which one of the following protocols is not used on the internet?
(a) HTTP
(b) DHCP
(c) DNS
(d) none of the mentioned
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Q: What does the internet term “thread” refer to?
(a) A series of linked messages
(b) A self-replicating virus
(c) A category of browser
(d) A common fault in display devices
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Q: What’s the name of the program or service that lets you view e-mail messages ?
(a) Web browser
(b) E-mail clients
(c) E-mail id
(d) Internet
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Q: When sending an e-mail, the ______ line describes the contents of the message?
(a) to
(b) subject
(c) contents
(d) CC
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Q: http stands for
(a) hyper text transfer protocol
(b) hypertet transmission protocol
(c) high transfer transport protocol
(d) hyper transfer text protocol
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Q: What does SMTP in an SMTP server stand for ?
(a) Simple Mail Transfer Protocol
(b) Serve Message Text Process
(c) Short Messaging Text Process
(d) Short Messaging Transfer Protocol
Answer ⇒ ??