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![]() com A domain name used by commercial enterprises. .gif Graphics Interchange Format (GIF) filename extension .jpg or .jpeg Filename extensions of images in JPEG format. .mov File name extension for files with video sequences. A QuickTime player is needed in order to play such a file. .mpg or .mpeg Filename extension for files in MPEG format. .zip File name extension for files compressed with PKZIP program or similar. 100BaseT Cabling used for FastEthernet. 10BaseT Cabling used for Ethernet. Active Channel An Active Channel is a frequently updated information residing on a Web server. Users can subscribe to the channel if they have a CDF (Channel Definition Language) capable browser (e.g. Internet Explorer) ActiveX ActiveX is a brand name referring to a set of Microsoft's technologies and services based on COM (Component Object Model) widely released in 1997. On the Internet, ActiveX can be used with IE versions 3 and above and with Netscape Navigator though plug-ins. ActiveX control is a COM object, written as a DLL in a programming language like Visual Basic, that follows ActiveX standards. Once downloaded, ActiveX controls have a large degree of freedom, presenting a security risk. ActiveX controls have to be digitally signed by their creator. Major competitor to ActiveX controls are JavaBeans. Some hosts support ActiveX server components for ASP. free web site, Free Web Hosting. free web hosting services
Plug-in An add-on piece of software that can extend the features of an existing application. For example Netscape browser plug-ins allow displaying of new types of web content, that the browser can't display on its own. POP Post Office Protocol. Popular but inflexible email retrieval standard. All messages are downloaded at the name time and can only be manipulated on a client machine. Current version is POP3. Also see IMAP. Port A socket on the computer or other network device used to connect it to the network. PPP (Point to Point Protocol) A network protocol widely used to connect computers to the Internet. Most often used on a telephone line. PRI (Primary Rate Interface). One of the two ISDN access methods. 23 of 64 Kbps B channels and 1 64 Kbps D channel constitute a PRI. Protocol A set of rules by following which two parties can communicate. The TCP/IP protocol suite is the basis of todays Internet. PSTN (Public Switched Telephone Network). The set of all the traditional telephone lines and all the infrastructure that comes with it. Python Interpreted programming language, sometimes offered by hosts for server-side scripting. Here is the Python home page. RAID Redundant Array of Independent (or Inexpensive) Disks. Type of disk, often used on servers, where several physical disks are combined into an array for better speed and fault tolerance. Level 0 implements data striping where file blocks are written to separate drives. Does not provide fault tolerance, because failure of one drive will result in data loss. Level 1 implements data mirroring. Data is duplicated on two drives either through software or hardware. Provides faster read performance than a single drive. Level 2 - not used in practice. Data is split at bit level at written to multiple drives. Level 3 - requires at least 3 drives. Data block is striped at byte level across drives and error correction codes (parity info) is recorder on another drive. Provides fault tolerance but slower writing performance. Level 4 - Similar to Level 3 but provides faster performance because it uses blocks for striping. Level 5 - Similar to Level 4 but improves performance but also striping parity info across multiple drives. Level 6 - Similar to Level 5 but also uses second parity scheme for better fault tolerance. Level 7 - Proprietary RAID design by Storage Computer Corporation. Faster than other levels because it uses multiple levels of cache and asynchronous I/O transfers. In addition multiple RAID levels can be combined to improve performance or reliability. Raw Logs Raw access data updated in real-time that can be downloaded and used by any statistics program. Typically each line show the user's IP, date and time of the access, what kind of request was done, which document was requested, HTTP status code, bytes transferred, referrer, and user agent info. If a host doesn't have statistics, you'll need access to raw logs to identify who your site's visitors are. Analyzing raw logs can also provide more detailed look at site accesses than stats. Reseller Resellers are usually smaller companies that still try to build their customers base. They don't own the server with user accounts but can perform most administrative functions. RJ-11 A standard connector that is used to connect to the telephone line. free web hosting services. Free Web Hosting
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