a parsonal comuter oprating system.
A deadlock is a situation when a process in the system has acquired some resources and waiting for more resources which are acquired by some other process which in turn is waiting for the resources acquired by this process. Hence, none of them can proceed and OS cant do any work.
3. What is ASCII - American Standard Code for Information Interchange?
ASCII (pronounced as-key) is short for American Standard Code for Information Interchange. It is a standard code that assigns a binary number to all the alphanumeric characters (upper and lower case), all the symbols on the keyboard, and some other symbols not on the keyboard (such as the cents symbol: ยข). All computers have been using this standard code for more than a decade, and this is how plain text is saved on a disk. This standard does not define any formatting however (except end of line), so word processors each have their own file type that includes formatting information as well.
A Web server is a server on the Internet that holds Web documents and makes them available for viewing by remote browsers.
A web page is a rich document that can contain richly formatted text, graphics, animation, sound, and much more. Some web pages are generated dynamically (such as the results of a search). You are currently viewing a (static) web page. Every web page on the Internet has a unique address which starts with the name of the computer that holds that page. Within a web page, words and pictures can be linked to other pages. When you activate a link, you will be taken to another page automatically. See also: Web, Web Browser, Understanding Internet Addresses.
Acronym for Windows Sockets. A set of standards and specifications for programmers who are programming a TCP/IP application to use in Windows.
7. What is WAIS (Wide Area Information Service)?
A search engine and distributed information service that allows indexed searching and natural language input.
8. What is URL (Universal Resource Locator)?
A Universal Resource Locator refers to the universal address of an Internet web page. A URL consists of three things. First, it starts with letters such as http, ftp, or gopher that identify the resource type, followed by a colon and two forward slashes. Next, the computer's name is listed. And finally, the filename and directory of the remote resource is listed as well.
This is the standard Internet protocol to connect to remote terminals.
A connection of a host to the Internet where data is transferred at 1.544 megabits per second.
A connection of a host to the Internet where data is transferred at 44.746 megabits per second.
11. Explain SMTP (Simple Mail Transfer Protocol)?
A standard protocol used to transfer e-mail messages.
A device that forwards traffic between networks.
A protocol is a method of communication between two devices. You can think of it as the language the devices use to communicate with each other, although it is not the same as a programming language (by which a human programmer controls a computer). Different brands of printers, for example, each use their own protocol (or "language") by which a computer can communicate with the printer. This is why a driver program must be written for each printer.
14. What is POP (Post Office Protocol)?
A protocol that allows single users to read mail from a server.
The OpenURL standard is a syntax to create Web-transportable packages of metadata and/or identifiers about an information object
16. Explain NNTP (Network News Transfer Protocol)?
A standard industry protocol for the inquiry, distribution, retrieval, and posting of news articles.
A mirror site is usually set up due to overwhelming traffic on an existing web site. A mirror site is a site that is kept separate from the original site but contains the same information as that site. This is an alternative to users who attempt to go to a web site but cannot due to traffic problems.
A mailing list is a list of e-mail addresses used to have messages forwarded to groups of people.
19. What is LAN (Local Area Network)?
Local Area Network. A LAN allows users to share files between computers, send e-mail and access the Internet. Most companies use Local Area Networks so that users can access information within or outside the LAN.
20. What is ISP (Internet Service Provider)?
An organization or company that has a network with a direct link to the Internet. This is done by using a dedicated line connection, usually through a link known as a T1 connection. Users can dial into to that network using their modem. Most ISP's now charge a monthly fee.
21. What is IRC (Internet Relay Chat)?
Internet Relay Chat, or IRC, allows users to chat on different channels over the Internet. IRC channels are preceded by a # sign and are controlled by channel operators. Channel operators can kick people out of the channel if he or she feels necessary.
22. What is the IP (Internet Protocol)?
A packet switching protocol that is used as a network layer in the TCP/IP protocol suite.
A search and retrieval tool for information used mostly for research.
A finger is a UNIX command that displays information about a group or user on the Internet.
Encryption is a procedure used in cryptography to convert plain text into ciphertext to prvent any but the intended recipient from reading that data.
26. What is DNS (Domain Name Service)?
A name service used with TCP/IP hosts. A DNS exists on numerous servers over the Internet. It is a database for finding host names and IP addresses on the Internet and trying to figure them out.
A communications line used solely for computer connections, such as T1 and T3 lines. An additional phone line solely for your modem is a dedicated line as well.
28. What is DDN (Defense Data Network)?
The United States Department of Defense global communications network.
A block of data that can travel from one Internet site to another without relying on an earlier exchange between the source and destination computers.
30. What is Data Encryption Standard (DES)?
Standardized encryption method used most on the Internet.
Provide a simple way to identify session among a group of HTTP/HTML requests. The cookie value is often an index into a table stored in the memory of a Web server that points to an inmemory object holding the user's records. This has many potential problems: If the user's request is routed to a different server in a subwequent request, the session information is unknown to the server. If the user is rounted to a different server and the server is part of an application cluster, then all the servers that could receive the user's request must have a way to synchronize the session data. Storing cookies and synchronizing sessions among clusters of server usually requires configuration, storage space, and memory.
32. What is Data Encryption Key (DEK)?
Used for encryption and decryption of message text.
Bandwidth is the rate at which data that can be transferred through a connection. A standard PC modem has a very low bandwidth of about 3,000 to 5,000 bytes per second. The very high speed lines that make up the backbone of the Internet are much faster, at least 1,000,000 bytes per second! Note that bandwidth is not exactly the same as speed. If you only want to transfer one byte, it may not get where it is going any faster with high-bandwidth than it would with low-bandwidth. However, if you want to transfer a million bytes, then high-bandwidth will definitely help! You can think of high-bandwidth as like drinking juice with a fat straw, whereas low bandwidth is like drinking juice with one of those thin coffee straws.
This term refers to when you send an e-mail to a non-existent recipient and the e-mail is "bounced" back to you.
A method of automatically collecting, indexing, and retrieving files from the Internet.
