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xmpp .org. Extensible Messaging and Presence Protocol ( XMPP, originally named Jabber [1]) is an open communication protocol designed for instant messaging (IM), presence information, and contact list maintenance. [2] Based on XML (Extensible Markup Language), it enables the near-real-time exchange of structured data between two or more network ...
Classless Inter-Domain Routing ( CIDR / ˈsaɪdər, ˈsɪ -/) is a method for allocating IP addresses for IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the previous classful network addressing architecture on the Internet. Its morgoal was to slow the growth of routing tables on routers across the Internet ...
The Gopher protocol (/ ˈ ɡ oʊ f ər /) is a communication protocol designed for distributing, searching, and retrieving documents in Internet Protocol networks. The design of the Gopher protocol and user interface is menu-driven, and presented an alternative to the World Wide Web in its early stages, but ultimately fell into disfavor, yielding to HTTP.
Smurf attack. A Smurf attack is a distributed denial-of-service attack in which large numbers of Internet Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are broadcast to a computer network using an IP broadcast address. [1] Most devices on a network will, by default, respond to this by sending a reply to ...
Request for Comments. A Request for Comments ( RFC) is a publication in a series from the principal technical development and standards-setting bodies for the Internet, most prominently the Internet Engineering Task Force (IETF). [1] [2] An RFC is authored by individuals or groups of engineers and computer scientists in the form of a memorandum ...
Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks. The software allows users to simulate the configuration of Cisco routers and switches using a simulated command line interface. Packet Tracer makes use of a drag and drop user ...
The Domain Name System ( DNS) is a hierarchical and distributed name service that provides a naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names (identification strings) assigned to each of the associated entities.
The - (minus sign) invokes subcommands which are specified on the command line and should precede nslookup commands. In non-interactive mode, i.e. when the first argument is a name or Internet address of the host being searched, parameters and the query are specified as command line arguments in the invocation of the program.