In information technology, header refers to supplemental data placed at the beginning of a block of data being stored or transmitted. In data transmission, the data following the header is sometimes called the payload or body.. It is vital that header composition follows a clear and unambiguous specification or format, to allow for parsing.. Examples. E-mail header: The text …

Internet Protocol version 4 (IPv4) is the fourth version of the Internet Protocol (IP). It is one of the core protocols of standards-based internetworking methods in the Internet and other packet-switched networks. IPv4 was the first version deployed for production on SATNET in 1982 and on the ARPANET in January 1983. It is still used to route most Internet traffic today, even with the …

IEEE 802.11 is part of the IEEE 802 set of local area network (LAN) technical standards, and specifies the set of media access control (MAC) and physical layer (PHY) protocols for implementing wireless local area network (WLAN) computer communication. The standard and amendments provide the basis for wireless network products using the Wi-Fi brand and are the …

In computing, tar is a computer software utility for collecting many files into one archive file, often referred to as a tarball, for distribution or backup purposes. The name is derived from "tape archive", as it was originally developed to write data to sequential I/O devices with no file system of their own.The archive data sets created by tar contain various file system parameters, such …

Next Unit of Computing (NUC) is a line of small-form-factor barebone computer kits designed by Intel.It was previewed in 2012 and launched in early 2013. The NUC has developed over ten generations, spanning from Sandy Bridge-based Celeron CPUs in the first generation through Ivy Bridge-based Core i3 and i5 CPUs in the second generation to Gemini Lake-based Pentium …

The Internet checksum, also called the IPv4 header checksum is a checksum used in version 4 of the Internet Protocol (IPv4) to detect corruption in the header of IPv4 packets. It is carried in the IP packet header, and represents the 16-bit result of summation of the header words.. The IPv6 protocol does not use header checksums. Its designers considered that the whole-packet link …

The longest common subsequence (LCS) problem is the problem of finding the longest subsequence common to all sequences in a set of sequences (often just two sequences). It differs from the longest common substring problem: unlike substrings, subsequences are not required to occupy consecutive positions within the original sequences.The longest common …

A virtual learning environment (VLE) is a system that creates an environment designed to facilitate teachers' management of educational courses for their students, especially a system using computer hardware and software, which involves distance learning.In North America, a virtual learning environment is often referred to as a "learning management system" (LMS).

A computer program is a sequence or set of instructions in a programming language for a computer to execute.Computer programs are one component of software, which also includes documentation and other intangible components.. A computer program in its human-readable form is called source code.Source code needs another computer program to execute …

In computing, the Executable and Linkable Format (ELF, formerly named Extensible Linking Format), is a common standard file format for executable files, object code, shared libraries, and core dumps.First published in the specification for the application binary interface (ABI) of the Unix operating system version named System V Release 4 (SVR4), and later in the Tool Interface …