explain the following abbreviations used in web design GIF,JPEG,URL,FTP,Eexpail TELNET,GOPHER IMG,SRC?

Question

explain the following abbreviations used in web design GIF,JPEG,URL,FTP,Eexpail TELNET,GOPHER IMG,SRC?

Answer 1

JPEG is often used in place of JFIF. JFIF is the JPEG File Interchange Format, the main image file format defined by the Joint Photographic Experts Group. The JFIF MIME type is 'image/jpeg' (defined in RFC 1341) and its most common file name extensions are '.jpg', '.jpe', '.jpeg', '.jfif', '.jfi'.



JFIF is most commonly used for photorealistic images at 24 bits per pixel, using lossy compression. The higher the degree of compression (the smaller the file size), the lower quality the image is. It is a trade-off between size and quality.



Alternatively, JPEG is used (again, improperly) to refer to Exif images. Exif is the Exchangeable image file format, a specification for the file format used by digital cameras. Exif uses existing image formats such as JFIF and TIFF, and adds support for metadata tags (comments, creation time, copyright, etc.). It was created by Japan Electronic Industry Development Association (JEIDA).



GIF, the graphic interchange format, is a bitmap image format introduced by CompuServe in 1987. It is possibly the most commonly used image file format on the Internet. The GIF MIME type is 'image/gif' with the file extension '.gif'. It supports up to 256 colors and supports LZW lossless compression (meaning there is no trade-off between quality and size), but larger images usually have much larger file sizes than with other formats.



GIF also supports animations and transparency (two things the main JFIF standard do not support).



A URL is a uniform resource locator, as defined in RFC 1738. It was defined primarily by Tim Berners-Lee (credited with having created the World Wide Web) at CERN (a particle accelerator lab) and other members of the URI working group of the IETF. URL provides a generic syntax for describing locations on the Internet. URL has largely been superceded by URI. An example URL (with permitted quoting marks) is .



A URI is a uniform resource identifier, defined in RFC 2936, provides a generic syntax for the location of resources (files or streams, for example) on the Internet. URI can basically be semtantically translated as:

[scheme ":"]["//" [username [":" password] "@"] host [":" port]]path["?" query]["#" fragment]

where bracketed groups ("[ ... ]") are optional and quoted items are string literals. Some example URIs follow:



/question/;_ylt=Ah78hEWZdiAlRiqzZaqAppsezKIX (just a path)

//answers.yahoo.com (an "authority" with only host name, and an empty path)

http:/question (scheme and path)

http://anonymous:[e-mail]:80/some/file?a=b&c=d#item (all optional parts included)

//127.0.0.1 (an authority made up of an IPv4 address)

ftp://bob:le214@[::1]:2100/docs (::1 is an IPv6 address)

telnet://www.my.site:1080

file:///some/random/file





FTP is the file transfer protocol, defined in RFC 959. FTP supports authoritative file management capabilities using the typical client-server paradigm. To quote RFC 959, "The objectives of FTP are 1) to promote sharing of files (computer programs and/or data), 2) to encourage indirect or implicit (via programs) use of remote computers, 3) to shield a user from variations in file storage systems among hosts, and 4) to transfer data reliably and efficiently."



Telnet is a high level TCP protocol. It's primary purpose is to provide a simple mechanism for a client to communicate with a server and vice versa. A telnet client is often used for other text-based protocols or remote textual user interfaces.



The Internet Gopher Protocol is a "distributed document search and retrieval protocol", defined in RFC 1436. The Gopher RFC defines a gopher as "software following a simple protocol for burrowing through a TCP/IP internet." It is largely defunct now, replaced by the World Wide Web.



RFC, which is repeated in this answer several times, stands for "request for comments". RFCs are open standards or genuine requests for comments. RFCs define almost every part of the Internet and are maintained by the IETF, another acronym mentioned in here.



IETF is the Internet Engineering Task Force, an ISOC (Internet Society) organisation. IETF does not accept RFCs as standards until they have actually been implemented and gone through the whole RFC process described in RFC 2026, the Internet Standards Process.





As already described as concisely as it can get, img is an abbreviation for image, used in HTML, and src is likewise an abbreviation for source (the URI of a resource).

Answer 2

GIF: Graphic Interchange Format. Yet another image format type generated specifically for computer use. Its resolution is usually very low (72 dpi, or that of your computer screen), making it undesirable for printing purposes.



Joint Photographic Experts Group. JPEG is a standards committee that designed an image compression format. The compression format they designed is known as a lossy compression, in that it deletes information from an image that it considers unnecessary. JPEG files can range from small amounts of lossless compression to large amounts of lossy compression. This is a common standard on the WWW, but the data loss generated in its compression make it undesirable for printing purposes.



(Uniform Resource Locator) -- The standard way to give the address of any resource on the Internet that is part of the World Wide Web (WWW). A URL looks like this: http://www.siamanholidays.com/



File Transfer Protocol. This is the language used for file transfer from computer to computer across the WWW. An anonymous FTP is a file transfer between locations that does not require users to identify themselves with a password or log-in. An anonymous FTP is not secure, because it can be accessed by any other user of the WWW.



Eexpail: ???????? Sorry its wrong or misspelled



TELNET: The Internet standard protocol for remote terminal connection service. TELNET allows a user at one site to interact with a remote timesharing system at another site as if the user's terminal was connected directly to the remote computer.



GOPHER: An Internet server document browsing and searching system that lets you search and retrieve texts on the Internet. Gopher has since been surpassed by the World Wide Web.



IMG - Short of Image in HTML

SRC - Short of Source in HTML. http://www.w3schools.com/tags/tag_img.asp

Answer 3

the answer above is good, but i am answering this question to tell u that u can find all extensions of files on a site called

cknow.com

here u will find most of the extensions