Web server hardware and software

Web server hardware and software

1. Web Server S oft w are and H ardware Presented by; Huma Rashid 19

2. Topics to be Covered Website & Its Types Web Server & It’s Elements Web server & Web Client Server Architecture Web Page Content Web server Software Web Server Hardware Web Server Operating System Server computer Performance Evaluation

3. Web Site A website is a collection of different types of data, which can be anything like text, graphics, videos etc, combined together to provide some kind of useful information. Collection of Web pages Web Page: What displays Example: Daraz.pk Zameen.com Google.com

4. Types of Web Site Development Sites: Building, creating, and an maintaining websites. Such as web design, we publishing, web programming, and database management. Example: Wix.com Transaction processing site Electronic site i.e. business-to-business and business-to-consumer Available 24 hours a day, seven days a week Example: Amazon.com OLX.com

5. Content-delivery sites: Deliver content such as news, histories, summaries, and other digital information Example: Yahoo.com MSN Intranet: Private Network Internal Website Share internal memos, corporate policy handbooks, expense account worksheets, budgets, newsletters, and a variety of other corporate documents. Extranet : Intranets that allow authorized parties outside the company to access information stored in the system

6. Web Server   A web server is a computer that stores a website's component files (e.g. HTML documents, images, and JavaScript files) and delivers them to the end-user's device over the internet. The most common use of Web server is to host Websites. A web server serves web pages to clients across the Internet or an Intranet. The web server hosts the pages, scripts, programs, and multimedia files and serves them using HTTP, a protocol designed to send files to web browsers and other protocol Three main elements of a Web server: Hardware Operating system software Web server software

7. Web server / Web Client Web Client: Any computing Device attached to the internet that is capable of making http request Web Server: A web server is any computer used to provide (or “serve”) files or make programs available to other computers connected to it through a network (such as a LAN or a WAN)

8. Client/Server Architecture Client/server architecture is a computing model in which the server hosts, delivers and manages most of the resources and services to be consumed by the client This type of architecture has one or more client computers connected to a central server over a network or Internet connection. 

9. Two-tier architecture Typical request message from a client to a server consists of three major parts: request line, optional request headers, and an optional entity body.

10. Three-Tier and N-Tier Client/Server Architectures A three-tier architecture extends the two-tier architecture to allow additional processing to occur before the Web server responds to the Web client’s request. Higher-order architectures - that is, those that have more than three tiers - are usually called n-tier architectures.

11. Web Page Content Dynamic Content: “Dynamic" content, smart content is a term for the aspects of a website, ad, or email body that change based on the interests or past behavior of the viewer. It creates an experience that's customized specifically for the visitor or reader at that moment. Static Content: It is any content that can be delivered to an end user without having to be generated, modified, or processed. The server deliver the same file to each user.

12. Operating software Microsoft Windows NT Server, Microsoft Windows 2000 or 2003 Server products, Linux, or one of several UNIX-based operating systems, Microsoft server products are simpler for information systems staff to learn and use than UNIX-based systems. UNIX based Web servers are more popular, and many users believe that UNIX is a more secure operating system

13. Web Hardware Server Computers : Web server computers generally have more memory, larger (and faster) hard disk drives, Faster processors than the typical desktop

14. Web Software Web server software : Server software is a type of software that is designed to be used, operated and managed on a computing server. Or Used by a server computer to make files and programs available to other computers Other programs -Internet utilities -Email software

15. Email A system for sending messages from one individual to another via telecommunications links between computers or terminals using dedicated software . Email messages are comprised of three components, as follows: Message envelope : Describes the email’s electronic format Message header: Includes sender/recipient information and email subject line Message body : Includes text, image and file attachments

16. Email benefits and drawback Benefit: Attachment Email is Fast Privacy is Maintained Draw Backs: Virus Unwanted Email(spam mails)

17. SPAM Electronic junk mail that can include Advertisements, or e-mail chain letters It consume large amounts of Internet capacity

18. Solution to SPAM: Companies now offer software to limit the amount of spam Control exposure of an e-mail address Use multiple e-mail addresses Content filtering strategy Require software that identifies content elements that indicate if a message is (or is not) spam Content-filtering techniques Black list spam filter White list spam filter Challenge-response

19. Internet utility program Finger Utilities: It is a program that runs on UNIX operating systems Allows user to obtain some information about other network users A Finger command yields a list of users who are logged on to a network , or reports the last time a user logged on to the network. Ping Utilities: Ping is short for Packet Internet Groper, It tests the connectivity between two computers connected to the Internet .

20. Telnet: Allows users to log on to a computer that is connected to the Internet This remote login capability can be useful for running older software that does not have a Web interface. FTP Utilities: It is part of the TCP/IP rules that defines the formats used to transfer files between TCP/IP-connected computers. Data Analysis Software: Web servers can capture visitor information, including data about who is visiting a Web site (the visitor’s URL), how long the visitor’s Web browser viewed the site, the date and time of each visit, and which pages the visitor viewed.

21. S erver computer Performance Evaluation Benchmarking: Testing used to compare the performance of hardware and software Throughput : Number of HTTP requests that a hardware and software combination can process in a unit of time Response time: Time required by a server to process one request