1.
CERN
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The European Organization for Nuclear Research, known as CERN, is a European research organization that operates the largest particle physics laboratory in the world. Established in 1954, the organization is based in a northwest suburb of Geneva on the Franco–Swiss border, Israel is the only non-European country granted full membership. The main site at Meyrin hosts a large computing facility, which is used to store and analyse data from experiments. Researchers need remote access to facilities, so the lab has historically been a major wide area network hub. CERN is also the birthplace of the World Wide Web, the convention establishing CERN was ratified on 29 September 1954 by 12 countries in Western Europe. The acronym was retained for the new laboratory after the council was dissolved. CERNs first president was Sir Benjamin Lockspeiser, edoardo Amaldi was the general secretary of CERN at its early stages when operations were still provisional, while the first Director-General was Felix Bloch. The laboratory was originally devoted to the study of atomic nuclei, therefore, the laboratory operated by CERN is commonly referred to as the European laboratory for particle physics, which better describes the research being performed there. Several important achievements in physics have been made through experiments at CERN. The 1984 Nobel Prize for Physics was awarded to Carlo Rubbia, the 1992 Nobel Prize for Physics was awarded to CERN staff researcher Georges Charpak for his invention and development of particle detectors, in particular the multiwire proportional chamber. The World Wide Web began as a CERN project named ENQUIRE, initiated by Tim Berners-Lee in 1989, Berners-Lee and Cailliau were jointly honoured by the Association for Computing Machinery in 1995 for their contributions to the development of the World Wide Web. Based on the concept of hypertext, the project was intended to facilitate the sharing of information between researchers, the first website was activated in 1991. On 30 April 1993, CERN announced that the World Wide Web would be free to anyone, a copy of the original first webpage, created by Berners-Lee, is still published on the World Wide Web Consortiums website as a historical document. Prior to the Webs development, CERN had pioneered the introduction of Internet technology, a short history of this period can be found at CERN. ch. More recently, CERN has become a facility for the development of computing, hosting projects including the Enabling Grids for E-sciencE. It also hosts the CERN Internet Exchange Point, one of the two main internet exchange points in Switzerland. 48×10−5, a measurement with 6. 0-sigma significance. However, on 23 February, CERN stated in a release that the results were flawed due to an incorrectly connected GPS-synchronization cable. In March 2012, the ICARUS Collaboration reported that the measurement would be reproduced by both OPERA and ICARUS, further tests, after fixing the GPS connector, showed speed measurements consistent with the speed of light from four experiments at Gran Sasso, including OPERA
2.
Unix
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Among these is Apples macOS, which is the Unix version with the largest installed base as of 2014. Many Unix-like operating systems have arisen over the years, of which Linux is the most popular, Unix was originally meant to be a convenient platform for programmers developing software to be run on it and on other systems, rather than for non-programmer users. The system grew larger as the system started spreading in academic circles, as users added their own tools to the system. Unix was designed to be portable, multi-tasking and multi-user in a time-sharing configuration and these concepts are collectively known as the Unix philosophy. By the early 1980s users began seeing Unix as a universal operating system. Under Unix, the system consists of many utilities along with the master control program. To mediate such access, the kernel has special rights, reflected in the division between user space and kernel space, the microkernel concept was introduced in an effort to reverse the trend towards larger kernels and return to a system in which most tasks were completed by smaller utilities. In an era when a standard computer consisted of a disk for storage and a data terminal for input and output. However, modern systems include networking and other new devices, as graphical user interfaces developed, the file model proved inadequate to the task of handling asynchronous events such as those generated by a mouse. In the 1980s, non-blocking I/O and the set of inter-process communication mechanisms were augmented with Unix domain sockets, shared memory, message queues, and semaphores. In microkernel implementations, functions such as network protocols could be moved out of the kernel, Multics introduced many innovations, but had many problems. Frustrated by the size and complexity of Multics but not by the aims and their last researchers to leave Multics, Ken Thompson, Dennis Ritchie, M. D. McIlroy, and J. F. Ossanna, decided to redo the work on a much smaller scale. The name Unics, a pun on Multics, was suggested for the project in 1970. Peter H. Salus credits Peter Neumann with the pun, while Brian Kernighan claims the coining for himself, in 1972, Unix was rewritten in the C programming language. Bell Labs produced several versions of Unix that are referred to as Research Unix. In 1975, the first source license for UNIX was sold to faculty at the University of Illinois Department of Computer Science, UIUC graduate student Greg Chesson was instrumental in negotiating the terms of this license. During the late 1970s and early 1980s, the influence of Unix in academic circles led to adoption of Unix by commercial startups, including Sequent, HP-UX, Solaris, AIX. In the late 1980s, AT&T Unix System Laboratories and Sun Microsystems developed System V Release 4, in the 1990s, Unix-like systems grew in popularity as Linux and BSD distributions were developed through collaboration by a worldwide network of programmers
3.
Web server
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A web server is a computer system that processes requests via HTTP, the basic network protocol used to distribute information on the World Wide Web. The term can refer to the system, or specifically to the software that accepts. The primary function of a web server is to store, process, the communication between client and server takes place using the Hypertext Transfer Protocol. Pages delivered are most frequently HTML documents, which may include images, the resource is typically a real file on the servers secondary storage, but this is not necessarily the case and depends on how the web server is implemented. While the primary function is to serve content, an implementation of HTTP also includes ways of receiving content from clients. This feature is used for submitting web forms, including uploading of files, many generic web servers also support server-side scripting using Active Server Pages, PHP, or other scripting languages. This means that the behaviour of the web server can be scripted in separate files, usually, this function is used to generate HTML documents dynamically as opposed to returning static documents. The former is used for retrieving or modifying information from databases. The latter is much faster and more easily cached but cannot deliver dynamic content. Web servers are not only used for serving the World Wide Web and they can also be found embedded in devices such as printers, routers, webcams and serving only a local network. The web server may then be used as a part of a system for monitoring or administering the device in question and this usually means that no additional software has to be installed on the client computer, since only a web browser is required. In 1989 Tim Berners-Lee proposed a new project to his employer CERN, the project resulted in Berners-Lee writing two programs in 1990, A browser called WorldWideWeb. In 1994 Berners-Lee decided to constitute the World Wide Web Consortium to regulate the development of the many technologies involved through a standardization process. On an Apache server, this is commonly /home/www, the result is the local file system resource, /home/www/path/file. html The web server then reads the file, if it exists, and sends a response to the clients web browser. The response will describe the content of the file and contain the file itself or a message will return saying that the file does not exist or is unavailable. A web server can be incorporated into the OS kernel. Web servers that run in user-mode have to ask the system for permission to use more memory or more CPU resources, executing in user mode can also mean useless buffer copies which are another handicap for user-mode web servers. When a web server is near to or over its limit, it becomes unresponsive, at any time web servers can be overloaded due to, Excess legitimate web traffic
4.
Volkswagen
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Volkswagen, shortened to VW, is a German automaker founded on May 28,1937 by the German Labour Front and headquartered in Wolfsburg. It is the flagship marque of the Volkswagen Group and is the largest automaker worldwide, Volkswagen is German for peoples car, and the companys current international advertising slogan is just Volkswagen. American English pronunciation is approximately volks wagon, for vehicle timeline tables, see, Volkswagen. Volkswagen was originally established in 1937 by the German Labour Front, in the early 1930s, the German auto industry was still largely composed of luxury models, and the average German could rarely afford anything more than a motorcycle. As a result, only one German out of 50 owned a car, seeking a potential new market, some car makers began independent peoples car projects – the Mercedes 170H, Adler AutoBahn, Steyr 55, and Hanomag 1. 3L, among others. The trend was not new, as Béla Barényi is credited with having conceived the design in the mid-1920s. Josef Ganz developed the Standard Superior, in Germany, the company Hanomag mass-produced the 2/10 PS Komissbrot, a small, cheap rear engined car, from 1925 to 1928. Also, in Czechoslovakia, the Hans Ledwinkas penned Tatra T77, Ferdinand Porsche, a well-known designer for high-end vehicles and race cars, had been trying for years to get a manufacturer interested in a small car suitable for a family. He felt the cars at the time were just stripped down big cars. He wanted his German citizens to have the access to a car as the Americans. The Peoples Car would be available to citizens of the Third Reich through a plan at 990 Reichsmark —about the price of a small motorcycle. Despite heavy lobbying in favor of one of the existing projects, thus, Hitler chose to sponsor an all-new, state-owned factory using Ferdinand Porsches design. The intention was that ordinary Germans would buy the car by means of a savings scheme, however, the entire project was financially unsound, and only the corruption and lack of accountability of the Nazi regime made it possible. Prototypes of the car called the KdF-Wagen, appeared from 1938 onwards, the car already had its distinctive round shape and air-cooled, flat-four, rear-mounted engine. The VW car was just one of many KdF programs, which included such as tours. The prefix Volks— was not just applied to cars, but also to products in Germany. On May 28,1937, Gesellschaft zur Vorbereitung des Deutschen Volkswagens mbH, more than a year later, on September 16,1938, it was renamed to Volkswagenwerk GmbH. Erwin Komenda, the longstanding Auto Union chief designer, part of Ferdinand Porsches hand-picked team, developed the car body of the prototype and it was one of the first cars designed with the aid of a wind tunnel—a method used for German aircraft design since the early 1920s
5.
World Wide Web
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The World Wide Web is an information space where documents and other web resources are identified by Uniform Resource Locators, interlinked by hypertext links, and can be accessed via the Internet. English scientist Tim Berners-Lee invented the World Wide Web in 1989 and he wrote the first web browser computer program in 1990 while employed at CERN in Switzerland. The Web browser was released outside of CERN in 1991, first to research institutions starting in January 1991. The World Wide Web has been central to the development of the Information Age and is the primary tool billions of people use to interact on the Internet, Web pages are primarily text documents formatted and annotated with Hypertext Markup Language. In addition to formatted text, web pages may contain images, video, audio, embedded hyperlinks permit users to navigate between web pages. Multiple web pages with a theme, a common domain name. Website content can largely be provided by the publisher, or interactive where users contribute content or the content depends upon the user or their actions, websites may be mostly informative, primarily for entertainment, or largely for commercial, governmental, or non-governmental organisational purposes. In the 2006 Great British Design Quest organised by the BBC and the Design Museum, Tim Berners-Lees vision of a global hyperlinked information system became a possibility by the second half of the 1980s. By 1985, the global Internet began to proliferate in Europe, in 1988 the first direct IP connection between Europe and North America was made and Berners-Lee began to openly discuss the possibility of a web-like system at CERN. Such a system, he explained, could be referred to using one of the meanings of the word hypertext. At this point HTML and HTTP had already been in development for two months and the first Web server was about a month from completing its first successful test. While the read-only goal was met, accessible authorship of web content took longer to mature, with the concept, WebDAV, blogs, Web 2.0. The proposal was modelled after the SGML reader Dynatext by Electronic Book Technology, a NeXT Computer was used by Berners-Lee as the worlds first web server and also to write the first web browser, WorldWideWeb, in 1990. By Christmas 1990, Berners-Lee had built all the necessary for a working Web, the first web browser. The first web site, which described the project itself, was published on 20 December 1990, jones stored it on a magneto-optical drive and on his NeXT computer. On 6 August 1991, Berners-Lee published a summary of the World Wide Web project on the newsgroup alt. hypertext. This date is confused with the public availability of the first web servers. The first server outside Europe was installed at the Stanford Linear Accelerator Center in Palo Alto, California, accounts differ substantially as to the date of this event
6.
Tim Berners-Lee
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Sir Timothy John Berners-Lee OM KBE FRS FREng FRSA FBCS, also known as TimBL, is an English computer scientist, best known as the inventor of the World Wide Web. Berners-Lee is the director of the World Wide Web Consortium, which oversees the development of the Web. He is also the founder of the World Wide Web Foundation and is a researcher and holder of the founders chair at the MIT Computer Science. He is a director of the Web Science Research Initiative, in 2011, he was named as a member of the board of trustees of the Ford Foundation. In 2004, Berners-Lee was knighted by Queen Elizabeth II for his pioneering work, in April 2009, he was elected a foreign associate of the United States National Academy of Sciences. Named in Time magazines list of the 100 Most Important People of the 20th century and he tweeted This is for everyone, which instantly was spelled out in LCD lights attached to the chairs of the 80,000 people in the audience. Berners-Lee was born in London, England, United Kingdom, one of four born to Mary Lee Woods. His parents worked on the first commercially built computer, the Ferranti Mark 1, a keen trainspotter as a child, he learnt about electronics from tinkering with a model railway. He studied at The Queens College, Oxford, from 1973 to 1976, after graduation, Berners-Lee worked as an engineer at the telecommunications company Plessey in Poole, Dorset. In 1978, he joined D. G. Nash in Ferndown, Dorset, Berners-Lee worked as an independent contractor at CERN from June to December 1980. While in Geneva, he proposed a project based on the concept of hypertext, to demonstrate it, he built a prototype system named ENQUIRE. After leaving CERN in late 1980, he went to work at John Pooles Image Computer Systems, Ltd, in Bournemouth and he ran the companys technical side for three years. The project he worked on was a remote procedure call which gave him experience in computer networking. In 1984, he returned to CERN as a fellow and it then was accepted by his manager, Mike Sendall. He used similar ideas to those underlying the ENQUIRE system to create the World Wide Web, for which he designed and his software also functioned as an editor, and the first Web server, CERN HTTPd. The first web site was built at CERN, despite this being an international organisation hosted by Switzerland, the office that Berners-Lee used was just across the border in France. It was put online on 6 August 1991 for the first time, It provided an explanation of what the World Wide Web was and we can connect with each other instantly, all over the world. In 1994, Berners-Lee founded the W3C at the Massachusetts Institute of Technology and it comprised various companies that were willing to create standards and recommendations to improve the quality of the Web
7.
OpenVMS
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OpenVMS is a computer operating system for use in general-purpose computing. It is the successor to the VMS Operating System, that was produced by Digital Equipment Corporation, in the 1990s, it was used for the successor series of DEC Alpha systems. OpenVMS also runs on the HP Itanium-based families of computers, as of 2015, a port to the X86-64 architecture is underway. The name VMS is derived from virtual memory system, according to one of its architectural features. OpenVMS is a operating system, but source code listings are available for purchase. OpenVMS is a multi-user, multiprocessing virtual memory-based operating system designed for use in time sharing, batch processing, when process priorities are suitably adjusted, it may approach real-time operating system characteristics. The system offers high availability through clustering and the ability to distribute the system over multiple physical machines and this allows the system to be tolerant against disasters that may disable individual data-processing facilities. OpenVMS contains a user interface, a feature that was not available on the original VAX-11/VMS system. Versions of VMS running on DEC Alpha workstations in the 1990s supported OpenGL, customers using OpenVMS include banks and financial services, hospitals and healthcare, network information services, and large-scale industrial manufacturers of various products. As of mid-2014, Hewlett Packard licensed the development of OpenVMS exclusively to VMS Software Inc, VMS Software will be responsible for developing OpenVMS, supporting existing hardware and providing roadmap to clients. The company has a team of developers that originally developed the software during DECs ownership. In April 1975, Digital Equipment Corporation embarked on a project, code named Star. A companion software project, code named Starlet, was started in June 1975 to develop a new operating system, based on RSX-11M. These two projects were integrated from the beginning. Gordon Bell was the VP lead on the VAX hardware and its architecture, the Star and Starlet projects culminated in the VAX 11/780 computer and the VAX-11/VMS operating system. The Starlet name survived in VMS as a name of several of the system libraries, including STARLET. OLB. Over the years the name of the product has changed, in 1980 it was renamed, with version 2.0 release, to VAX/VMS. g. The smallest MicroVAX2000 had a 40MB RD32 hard disk and a maximum of 6MB of RAM, microVMS kits were released for VAX/VMS4.4 to 4.7 on TK50 tapes and RX50 floppy disks, but discontinued with VAX/VMS5.0
8.
Operating system
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An operating system is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require a system to function. Operating systems are found on many devices that contain a computer – from cellular phones, the dominant desktop operating system is Microsoft Windows with a market share of around 83. 3%. MacOS by Apple Inc. is in place, and the varieties of Linux is in third position. Linux distributions are dominant in the server and supercomputing sectors, other specialized classes of operating systems, such as embedded and real-time systems, exist for many applications. A single-tasking system can run one program at a time. Multi-tasking may be characterized in preemptive and co-operative types, in preemptive multitasking, the operating system slices the CPU time and dedicates a slot to each of the programs. Unix-like operating systems, e. g. Solaris, Linux, cooperative multitasking is achieved by relying on each process to provide time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking, 32-bit versions of both Windows NT and Win9x, used preemptive multi-tasking. Single-user operating systems have no facilities to distinguish users, but may allow multiple programs to run in tandem, a distributed operating system manages a group of distinct computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing, distributed computations are carried out on more than one machine. When computers in a work in cooperation, they form a distributed system. The technique is used both in virtualization and cloud computing management, and is common in large server warehouses, embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy and they are able to operate with a limited number of resources. They are very compact and extremely efficient by design, Windows CE and Minix 3 are some examples of embedded operating systems. A real-time operating system is a system that guarantees to process events or data by a specific moment in time. A real-time operating system may be single- or multi-tasking, but when multitasking, early computers were built to perform a series of single tasks, like a calculator. Basic operating system features were developed in the 1950s, such as resident monitor functions that could run different programs in succession to speed up processing
9.
Hypertext Transfer Protocol
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The Hypertext Transfer Protocol is an application protocol for distributed, collaborative, and hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, Hypertext is structured text that uses logical links between nodes containing text. HTTP is the protocol to exchange or transfer hypertext, development of HTTP was initiated by Tim Berners-Lee at CERN in 1989. Standards development of HTTP was coordinated by the Internet Engineering Task Force and the World Wide Web Consortium, culminating in the publication of a series of Requests for Comments. The first definition of HTTP/1.1, the version of HTTP in common use, occurred in RFC2068 in 1997, although this was obsoleted by RFC2616 in 1999 and then again by RFC7230 and family in 2014. A later version, the successor HTTP/2, was standardized in 2015, HTTP functions as a request–response protocol in the client–server computing model. A web browser, for example, may be the client, the client submits an HTTP request message to the server. The server, which provides resources such as HTML files and other content, or performs other functions on behalf of the client, the response contains completion status information about the request and may also contain requested content in its message body. A web browser is an example of a user agent, other types of user agent include the indexing software used by search providers, voice browsers, mobile apps, and other software that accesses, consumes, or displays web content. HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers, high-traffic websites often benefit from web cache servers that deliver content on behalf of upstream servers to improve response time. Web browsers cache previously accessed web resources and reuse them when possible to network traffic. HTTP proxy servers at private network boundaries can facilitate communication for clients without a globally routable address, HTTP is an application layer protocol designed within the framework of the Internet protocol suite. Its definition presumes an underlying and reliable transport layer protocol, however HTTP can be adapted to use unreliable protocols such as the User Datagram Protocol, for example in HTTPU and Simple Service Discovery Protocol. HTTP resources are identified and located on the network by Uniform Resource Locators, using the Uniform Resource Identifiers schemes http, uRIs and hyperlinks in HTML documents form inter-linked hypertext documents. HTTP/1.1 is a revision of the original HTTP, in HTTP/1.0 a separate connection to the same server is made for every resource request. HTTP/1.1 can reuse a connection multiple times to download images, scripts, stylesheets, HTTP/1.1 communications therefore experience less latency as the establishment of TCP connections presents considerable overhead. Tim Berners-Lee and his team at CERN are credited with inventing the original HTTP along with HTML and the technology for a web server. Berners-Lee first proposed the WorldWideWeb project in 1989—now known as the World Wide Web, the first version of the protocol had only one method, namely GET, which would request a page from a server
10.
Robert Cailliau
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Robert Cailliau is a Belgian informatics engineer and computer scientist who created the first web browser for the Mac. He also designed the logo of the WWW, and organized the first International World Wide Web Conference at CERN in 1994. Cailliau was born in Tongeren, Belgium, in 1958 he moved with his parents to Antwerp. After secondary school he graduated from Ghent University in 1969 as civil engineer in electrical and mechanical engineering and he also has an MSc from the University of Michigan in Computer, Information and Control Engineering,1971. During his military service in the Belgian Army he maintained Fortran programs to simulate troop movements, in December 1974 he started working at CERN as a Fellow in the Proton Synchrotron division, working on the control system of the accelerator. In April 1987 he left the PS division to become leader of Office Computing Systems in the Data Handling division. In 1989, Tim Berners-Lee proposed a system for access to the many forms of documentation at. Berners-Lee created the system, calling it World Wide Web, between September and December 1990, during this time, Cailliau and he co-authored a proposal for funding for the project. Cailliau later became a key proponent of the project and developed with Nicola Pellow the first web browser for the Classic Mac OS operating system called MacWWW, in 1993, in collaboration with the Fraunhofer Gesellschaft Cailliau started the European Commissions first web-based project for information dissemination in Europe. As a result of his work with CERNs Legal Service, CERN released the web technology into the domain on 30 April 1993. In December 1993 Cailliau called for the first International WWW Conference which was held at CERN in May 1994, the oversubscribed conference brought together 380 web pioneers and was a milestone in the development of the web. The conference led to the forming of the International World Wide Web Conferences Steering Committee which has organized a conference since then. Cailliau was a member of the Committee from 1994 until 2002, in 1995 Cailliau started the Web for Schools project with the European Commission, introducing the web as a resource for education. After helping to transfer the web development from CERN to the World Wide Web Consortium and he went on early retirement from CERN in January 2007. Cailliau is now a member of Newropeans, a pan-European political movement for which he. 1995, ACM Software System Award 1999, Christophe Plantin Prize, Antwerp 1999, southern Cross University 2000, Dr. Hon
11.
NeXT Computer
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The NeXT Computer is a workstation computer developed, marketed, and sold by NeXT Inc. It runs the Mach- and BSD-derived, Unix-based NeXTSTEP operating system, the motherboard is square and fits into one of four identical slots in the enclosure. The NeXT Computer enclosure consists of a 1-foot die-cast magnesium cube-shaped, black case and it was launched in 1988 at US$6,500. The NeXT Computer was succeeded by the NeXTcube, an upgraded model and this event gave developers interested in developing NeXT software an insight into the software architecture, object-oriented programming, and developing for the NeXT Computer. The luncheon speaker was Steve Jobs, citing as truly innovative the optical drive, DSP, and object-oriented programming environment, the magazine concluded that the NeXT Computer is worth every penny of its $6500 market price. It was, however, not a significant commercial success, failing to reach the level of volume sales like the Apple II, Commodore 64. The workstations were sold to universities, financial institutions, and government agencies, issue #3 was first demonstrated to Steve Jobs at NeXTWorld Expo 1993. com — NeXTcube Photos of black hardware A fun fact and one of Steve Jobs quirks. All the components in the including the PCB and connectors had to be black in color. PCBs were typically green from the mask that was applied. A process of pad capping was developed to allow the black oxide from the layers to be seen. Even the euro card connector had to be molded in black which where typically grey. The mounting hardware had to be black oxide. etc
12.
Proxy server
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In computer networks, a proxy server is a server that acts as an intermediary for requests from clients seeking resources from other servers. Proxies were invented to add structure and encapsulation to distributed systems, today, most proxies are web proxies, facilitating access to content on the World Wide Web, providing anonymity and may be used to bypass IP address blocking. A proxy server may reside on the local computer, or at various points between the users computer and destination servers on the Internet. A proxy server that passes requests and responses unmodified is usually called a gateway or sometimes a tunneling proxy, a forward proxy is an Internet-facing proxy used to retrieve from a wide range of sources. A reverse proxy is usually an internal-facing proxy used as a front-end to control, a reverse proxy commonly also performs tasks such as load-balancing, authentication, decryption or caching. An open proxy is a proxy server that is accessible by any Internet user. Gordon Lyon estimates there are hundreds of thousands of open proxies on the Internet, an anonymous open proxy allows users to conceal their IP address while browsing the Web or using other Internet services. There are varying degrees of anonymity however, as well as a number of methods of tricking the client into revealing itself regardless of the proxy being used, a reverse proxy is a proxy server that appears to clients to be an ordinary server. Requests are forwarded to one or more proxy servers which handle the request, the response from the proxy server is returned as if it came directly from the original server, leaving the client no knowledge of the origin servers. Reverse proxies are installed in the neighborhood of one or more web servers, all traffic coming from the Internet and with a destination of one of the neighborhoods web servers goes through the proxy server. The use of reverse originates in its counterpart forward proxy since the reverse proxy sits closer to the web server and this problem can partly be overcome by using the SubjectAltName feature of X.509 certificates. Load balancing, the proxy can distribute the load to several web servers. In such a case, the proxy may need to rewrite the URLs in each web page. Serve/cache static content, A reverse proxy can offload the web servers by caching static content like pictures, compression, the proxy server can optimize and compress the content to speed up the load time. Spoon feeding, reduces resource usage caused by slow clients on the web servers by caching the content the web server sent and this especially benefits dynamically generated pages. Security, the server is an additional layer of defence and can protect against some OS. However, it does not provide any protection from attacks against the web application or service itself, a content-filtering web proxy server provides administrative control over the content that may be relayed in one or both directions through the proxy. It is commonly used in commercial and non-commercial organizations to ensure that Internet usage conforms to acceptable use policy
