background preloader

Hypertext Transfer Protocol

Hypertext Transfer Protocol
The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems.[1] HTTP is the foundation of data communication for the World Wide Web. The standards development of HTTP was coordinated by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), culminating in the publication of a series of Requests for Comments (RFCs), most notably RFC 2616 (June 1999), which defined HTTP/1.1, the version of HTTP most commonly used today. In June 2014, RFC 2616 was retired and HTTP/1.1 was redefined by RFCs 7230, 7231, 7232, 7233, 7234, and 7235.[2] HTTP/2 is currently in draft form. Technical overview[edit] URL beginning with the HTTP scheme and the WWW domain name label. A web browser is an example of a user agent (UA). HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers. History[edit] The first documented version of HTTP was HTTP V0.9 (1991).

HTTP Secure Hypertext Transfer Protocol Secure (HTTPS) is a communications protocol for secure communication over a computer network, with especially wide deployment on the Internet. Technically, it is not a protocol in and of itself; rather, it is the result of simply layering the Hypertext Transfer Protocol (HTTP) on top of the SSL/TLS protocol, thus adding the security capabilities of SSL/TLS to standard HTTP communications. The security of HTTPS is therefore that of the underlying TLS, which uses long term public and secret keys to exchange a short term session key to encrypt the data flow between client and server. To guarantee one is talking to the partner one wants to talk to, X.509 certificates are used. In its popular deployment on the internet, HTTPS provides authentication of the web site and associated web server that one is communicating with, which protects against man-in-the-middle attacks. Overview[edit] HTTPS creates a secure channel over an insecure network. Usage in websites[edit]

Introduction to RSS(Rich Summary Site) Recently, there has been an unprecedented caution regarding data privacy. With infamous leaks and instances of phishing and spamming all around, no one wants to put their personal information out there without restraint, in fear of being the next unfortunate target. This makes staying posted with favored content on the massive expanse of the World Wide Web a daunting task. It seems like its time to grab onto the steering wheels. What is RSS? RSS stands for Rich Site Summary or Really Simple Syndication. To set up RSS for a website an XML file has to be created known as the RSS document or RSS Feed.Below is a sample RSS document. Explanation of the code : First comes the XML tag, its version and encoding scheme.The following line marks the beginning of the RSS tag with its version in use. .The next few lines show the channel tag, which marks the beginning of the RSS Feed. Once the XML is ready and validated, it is uploaded to the server.

S-T: Http Request/Response Anatomy Introduction to Web Web consist of billion of clients and server connected through wires and wireless networks. The web clients makes request to web server. The web server receives the request, finds the resources and return response to the client. Web Application A web site is a collection of static files such as HTML pages, images, graphics etc. HTTP is a protocol that clients and server uses on the web to communicate.It is similar to other internet protocol such as SMTP(Simple Mail Transfer Protocol) and FTP(File Transfer Protocol) but there is one fundamental difference.HTTP is a stateless protocol i.e HTTP supports only one request per connection.This means that with HTTP the clients connects to the server to send one request and then disconnects. HTTP method HTTP request can be made using a variety of methods, but the ones you will use most often are Get and Post. HTTP Method and Descriptions Difference between GET and POST request Anatomy of an HTTP GET request

Magnet URI scheme The Magnet URI scheme, defines the format of magnet links, a de facto standard for identifying files by their content, via cryptographic hash value rather than by their location. Although magnet links can be used in a number of contexts, they are particularly useful in peer-to-peer file sharing networks because they allow resources to be referred to without the need for a continuously available host, and can be generated by anyone who already has the file, without the need for a central authority to issue them. This makes them popular for use as "guaranteed" search terms within the file sharing community where anyone can distribute a magnet link to ensure that the resource retrieved by that link is the one intended, regardless of how it is retrieved. History[edit] Technical description[edit] Magnet URIs consist of a series of one or more parameters, the order of which is not significant, formatted in the same way as query strings that ordinarily terminate HTTP URLs. magnet:? Design[edit] x.

Evernote - Notes Organizer on the App Store Capture ideas when inspiration strikes. Bring your notes, to-dos, and schedule together to tame life’s distractions and accomplish more—at work, at home, and everywhere in between. Evernote syncs to all your devices, so you can stay productive on the go. “Use Evernote as the place you put everything… Don’t ask yourself which device it’s on—it’s in Evernote” – The New York Times “When it comes to taking all manner of notes and getting work done, Evernote is an indispensable tool.” – PC Mag • Write, collect, and capture ideas as searchable notes, notebooks, and to-do lists. • Clip interesting articles and web pages to read or use later. • Add different types of content to your notes: text, docs, PDFs, sketches, photos, audio, web clippings, and more. • Use your camera to scan and organize paper documents, business cards, whiteboards, and handwritten notes. • Manage your to-do list with Tasks—set due dates and reminders, so you never miss a deadline. Also available from Evernote:

HTTP: The Protocol Every Web Developer Must Know - Part 2 In my previous article, we covered some of HTTP's basics, such as the URL scheme, status codes and request/response headers. With that as our foundation, we will look at the finer aspects of HTTP, like connection handling, authentication and HTTP caching. These topics are fairly extensive, but we'll cover the most important bits. A connection must be established between the client and server before they can communicate with each other, and HTTP uses the reliable TCP transport protocol to make this connection. HTTPS is a secure version of HTTP, inserting an additional layer between HTTP and TCP called TLS or SSL (Transport Layer Security or Secure Sockets Layer, respectively). An HTTP connection is identified by <source-IP, source-port> and <destination-IP, destination-port>. resolve IP address from host name via DNSestablish a connection with the serversend a requestwait for a responseclose connection The server is responsible for always responding with the correct headers and responses.

File Transfer Protocol FTP is built on a client-server architecture and uses separate control and data connections between the client and the server.[1] FTP users may authenticate themselves using a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that hides (encrypts) the username and password, and encrypts the content, FTP is often secured with SSL/TLS ("FTPS"). SSH File Transfer Protocol ("SFTP") is sometimes also used instead, but is technologically different. History[edit] The original specification for the File Transfer Protocol was written by Abhay Bhushan and published as RFC 114 on 16 April 1971. Until 1980, FTP ran on NCP, the predecessor of TCP/IP.[2] The protocol was later replaced by a TCP/IP version, RFC 765 (June 1980) and RFC 959 (October 1985), the current specification. Protocol overview[edit] Communication and data transfer[edit] ASCII mode: used for text. Login[edit] or:

Create interactive presentations with Genially, free and online | Genially Interactive slides contain clickable hotspots, links, buttons, and animations that are activated at the touch of a button. Instead of reading or watching passively, your audience can actively interact with the content. Genially’s interaction presentation software allows you to combine text, photos, video clips, audio and other content in one deck. It’s a great way to condense more information into fewer slides. If you’re a teacher, you can share multiple materials in one single learning resource. Students can create their own projects using digital media and online maps. An interactive slide deck is more user-friendly than a Microsoft PowerPoint presentation or Google Slides document. The other benefit of interactive content is increased engagement. The best way to make slides clickable is to use Genially’s free interactive presentation program. Choose from the library of hotspot buttons and icons to show people what to click on. Looking for ways to make dull topics exciting? You bet!

BitTorrent Programmer Bram Cohen, a former University at Buffalo graduate student in Computer Science,[4] designed the protocol in April 2001 and released the first available version on July 2, 2001,[5] and the final version in 2008.[6] BitTorrent clients are available for a variety of computing platforms and operating systems including an official client released by Bittorrent, Inc. As of 2009, BitTorrent reportedly had about the same number of active users online as viewers of YouTube and Facebook combined.[7][8] As of January 2012[update], BitTorrent is utilized by 150 million active users (according to BitTorrent, Inc.). Based on this figure, the total number of monthly BitTorrent users can be estimated at more than a quarter of a billion.[9] Description[edit] The middle computer is acting as a seed to provide a file to the other computers which act as peers. The file being distributed is divided into segments called pieces. When a peer completely downloads a file, it becomes an additional seed.

Prezi Online presentation design platform Prezi is a Hungarian video and visual communications software company founded in 2009 in Hungary, with offices in San Francisco, Budapest and Riga as of 2020.[1] According to Prezi, in 2021, the software company has more than 100 million users worldwide[2] who have created approximately 400 million presentations.[3][1][4] In 2019, they launched Prezi Video, a tool that allows for virtual presentations within the video screen of a live or recorded video.[5] The word Prezi is the short form of "presentation" in Hungarian.[6] As of January 2022, the company had around 300 employees in 13 countries.[7] History[edit] In early 2011, Prezi launched its first iPad application. In March 2014, Prezi pledged $100 million in free licenses to Title 1 schools as part of the Obama administration's ConnectED program.[13] November of that year saw the announcement of $57 million in new funding from Spectrum Equity and Accel Partners.[14] Products and features[edit]

eDonkey network The eDonkey Network (also known as the eDonkey2000 network or eD2k) is a decentralized, mostly server-based, peer-to-peer file sharing network best suited to share big files among users, and to provide long term availability of files. Like most sharing networks, it is decentralized, as there is not any central hub for the network; also, files are not stored on a central server but are exchanged directly between users based on the peer-to-peer principle. Currently, the eD2k network is not supported by any organization (in the past it was supported by the MetaMachine Corporation, its creator, which now is out of business) and development and maintenance is being fully provided by its community and client developers. There are many programs that act as the client part of the network. The original eD2k protocol has been extended by subsequent releases of both eserver and eMule programs, generally working together to decide what new features the eD2k protocol should support. Features[edit]

Faison Cemetery Historic cemetery in North Carolina, United States United States historic place Faison Cemetery is a historic cemetery located at Faison, Duplin County, North Carolina. It was added to the National Register of Historic Places in 2006.[1]

Related: