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Topics referred to by the same term
header in Wiktionary, the free dictionary. Header may refer to: Header (computing), supplemental data at the beginning of a data block E-mail header HTTP
Header
HTTP header field
Do Not Track (DNT) is a deprecated non-standard HTTP header field designed to allow internet users to opt out of tracking by websites, which includes the
Do_Not_Track
Information at the beginning of data which describes or defines the data
In information technology, header is supplemental data placed at the beginning of a block of data being stored or transmitted. In data transmission, the
Header_(computing)
Supplemental data in an IP packet
An IP header is header information at the beginning of an Internet Protocol (IP) packet. An IP packet is the smallest message entity exchanged via the
IP_header
Mail sent using electronic means
header. Each email message has a header (the "header section" of the message, according to the specification), comprising a number of fields ("header
Application layer protocol
header fields that describe the body. In particular, not all headers were considered part of the entity. The term entity header referred to a header that
HTTP
Principal protocol used for transmission of datagrams across an IP network
using a pseudo header that contains some of the same information from the real IPv4 header. The pseudo header is not the real IPv4 header used to send an
User_Datagram_Protocol
HTTP header fields. A core set of fields is standardized by the Internet Engineering Task Force (IETF) in RFC 9110 and 9111. The Field Names, Header Fields
List_of_HTTP_header_fields
Fourth version of the Internet Protocol
first header field in an IP packet is the Version field. For IPv4, this is always equal to 4. Internet Header Length (IHL): 4 bits The IPv4 header is variable
IPv4
Topics referred to by the same term
Look up doubleheader or double-header in Wiktionary, the free dictionary. Doubleheader or double header may refer to: Doubleheader (baseball), two baseball
Doubleheader
Text that is separated from the body text and appears at the top of a page
In typography and word processing, a page header (or simply header) is text that is separated from the body text and appears at the top of a printed page
Page_header
Type of simple electrical connector
A pin header (or simply, header) is a form of electrical connector. A male pin header consists of one or more rows of metal pins molded into a plastic
Pin_header
Malicious website exploit where unauthorized commands are transmitted from a trusted user
abbreviation in defences against CSRF attacks, such as techniques that use header data, form data, or cookies, to test for and prevent such attacks. In a
Cross-site_request_forgery
Principal protocol used to stream data across an IP network
TCP Version 3.1 Header Format (February 1978) IEN #40 Transmission Control Protocol Draft Version 4 (June 1978) IEN #44 Latest Header Formats (June 1978)
Transmission_Control_Protocol
Secure network protocol suite
unauthenticated) IPv4 header fields are DSCP/ToS, ECN, Flags, Fragment Offset, TTL and Header Checksum. In IPv6, the AH protects most of the IPv6 base header, AH itself
IPsec
Optimized type of file in computer programming
precompiled headers may significantly reduce compilation time, especially when applied to large header files, header files that include many other header files
Precompiled_header
Masonry made of bricks and mortar
bottom surfaces are called beds Ends or narrow surfaces are called headers or header faces Sides or wider surfaces are called stretchers or stretcher faces
Brickwork
2006 American film
Header is a 2006 horror film directed by Archibald Flancranstin, and written Michael E. Kennedy. It is based on the 1995 novella Header by Edward Lee
Header_(film)
Access control method for the HTTP network communication protocol
when making a request. In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic <credentials>, where <credentials>
Basic_access_authentication
English rugby union competition
The London Double Header ran between 2004 and 2017 and typically opened the season of Premiership Rugby (currently known as the Gallagher Premiership due
London_Double_Header
Topics referred to by the same term
and Linkable Format § Section Header ISO 10303-21 § HEADER section Value change dump § Header section List of HTTP header fields This disambiguation page
Section_header
Mechanism to detect corruption in the header of an IPv4 packet
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
Internet_checksum
Internet protocol used for error messages in network operations
an IP datagram first decrements the time to live (TTL) field in the IP header by one. If the resulting TTL is 0, the packet is discarded and an ICMP time
Internet Control Message Protocol
Internet_Control_Message_Protocol
Type of data transmitted by a web browser
In computing, the User-Agent header is an HTTP header intended to identify the user agent responsible for making a given HTTP request. Whereas the character
User-Agent_header
Gay bar in Seattle
The Double Header was a gay bar located at 407 2nd Avenue S in Seattle's Pioneer Square neighborhood, in the U.S. state of Washington. The establishment
The_Double_Header
Topics referred to by the same term
Look up tripleheader in Wiktionary, the free dictionary. Triple header or variant thereof, may refer to: Baseball tripleheader, three baseball games on
Triple_header
Windows Bitmap image file format family
format, but it does not contain the 14-byte bitmap file header and begins with the DIB header. For DIBs loaded in memory, the color table can also consist
BMP_file_format
experimental conditions. 100 Continue The server has received the request headers and the client should proceed to send the request body (in the case of
List_of_HTTP_status_codes
Version 6 of the Internet Protocol
Authentication Header (AH) and the Encapsulating Security Payload header (ESP) are implemented as IPv6 extension headers. The packet header in IPv6 is simpler
IPv6
Family of archive file formats
the compressed data: The central directory file header entry is an expanded form of the local header: After all the central directory entries comes the
ZIP_(file_format)
Standard file format for executables, object code, shared libraries, and core dumps
of one ELF header, followed by file data. The data can include: Program header table, describing zero or more memory segments Section header table, describing
Executable and Linkable Format
Executable_and_Linkable_Format
Mechanism for automatic trading in digital advertising
Header bidding is a programmatic advertising technique in which publishers bid on multiple advertising exchanges in real time. Google has been reported
Header_bidding
Technique used in association football
A header is a technique that is used in association football to control the ball using the head to pass, shoot, or clear. This can be done from a standing
Header_(association_football)
Method of emergency broadcasting in the United States
"beeping" sounds at the start and end of each message. The first signal is the "header" which encodes, among other information, the alert type and locations, or
Emergency_Alert_System
Unit of data on an Ethernet network
packet at the physical layer. Each Ethernet frame starts with an Ethernet header, which contains destination and source MAC addresses as its first two fields
Ethernet_frame
Web application security vulnerability
HTTP header injection is a general class of web application security vulnerability which occurs when Hypertext Transfer Protocol (HTTP) headers are dynamically
HTTP_header_injection
Smallest message entity exchanged using Internet Protocol version 6
information in IPv6 packets is subdivided into a mandatory fixed header and optional extension headers. The payload of an IPv6 packet is typically a datagram or
IPv6_packet
C/C++ library offered in pure header files
called header-only if the full definitions of all macros, functions and classes comprising the library are visible to the compiler in a header file form
Header-only
Robust Header Compression (ROHC) is a standardized method to compress the IP, UDP, UDP-Lite, RTP, and TCP headers of Internet packets. In streaming applications
Robust_Header_Compression
The table is presented in alphabetical order by common name. Each column header has an up-down arrow (⬍) that may be used freely to rearrange the order
List of typographical symbols and punctuation marks
List_of_typographical_symbols_and_punctuation_marks
found in the 8-bit Protocol field of the IPv4 header and the 8-bit Next Header field of the IPv6 header. It is an identifier for the encapsulated protocol
List_of_IP_protocol_numbers
Text file processor instruction to include the content of one file into another
copybook. Generally, for C/C++ the include directive is used to include a header file, but can include any file. Although relatively uncommon, it is sometimes
Include_directive
Simple email-validation system designed to detect email spoofing
and for downstream transmission it typically appears in the "Return-Path" header. To authenticate the email address which is actually visible to recipients
Sender_Policy_Framework
This is a list of all airline codes. The table lists the IATA airline designators, the ICAO airline designators and the airline call signs (telephony designator)
List_of_airline_codes
HTTP header field introduced in HTTP/1.1
The Upgrade header field is an HTTP header field introduced in HTTP/1.1. In the exchange, the client begins by making a cleartext request, which is later
HTTP/1.1_Upgrade_header
Excavation equipment
roadheader, also called a boom-type roadheader, road header machine, road header or just header machine, is a piece of excavating equipment consisting
Roadheader
Multipurpose Internet Mail Extensions
application programs. Message bodies may consist of multiple parts, and header information may be specified in non-ASCII character sets. Email messages
MIME
Modular translation unit in C++
as a modern alternative to precompiled headers. A module in C++ comprises a single translation unit. Like header files and implementation files, a module
Modules_(C++)
HTTP header field
The X-Forwarded-For (XFF) HTTP header field is a common method for identifying the originating IP address of a client connecting to a web server through
X-Forwarded-For
Data used to detect errors in other data
xxHash Error correction Hamming code Reed–Solomon error correction IPv4 header checksum Hash functions List of hash functions Luhn algorithm Parity bit
Checksum
Cisco tunneling protocol
directly, use IP protocol type 47 in the IPv4 header's Protocol field or the IPv6 header's Next Header field. For performance reasons, GRE can also be
Generic_routing_encapsulation
Web security vulnerability
Transfer-Encoding header is present, the Content-Length header is supposed to be omitted. Working similarly but with a different syntax, the Content-Length header works
HTTP_request_smuggling
HTTP status code indicating that access is forbidden to a resource
PROPFIND request but did not also issue the required Depth header or issued a Depth header of infinity. Client request: GET /hello.html HTTP/1.1 Host:
HTTP_403
Internet error message
404.8 – Hidden namespace. 404.9 – File attribute hidden. 404.10 – Request header too long. 404.11 – Request contains double escape sequence. 404.12 – Request
HTTP_404
Australian power pop band
Header is an Australian power pop band that formed in Perth in 1994. Their single "Restoration" was engineered by Chris Dickie who earned a nomination
Header_(band)
Structure collecting an engine's exhaust outlets
called a collector. Headers that do not have collectors are called zoomie headers. The most common types of aftermarket headers are made of mild steel
Exhaust_manifold
14th episode of the 4th season of The Ren & Stimpy Show
"Double Header" is the fourteenth episode of the fourth season of The Ren & Stimpy Show. It originally aired on Nickelodeon in the United States on January
Double_Header
Communication protocol that allows connections between networks
IP header is different from the modern IPv4 header. IEN 44 Latest Header Formats (June 1978) describes another version of IPv4, also with a header different
Internet_Protocol
Standard library for the C programming language
interface (API) of the C standard library is declared in a number of header files. Each header file contains one or more function declarations, data type definitions
C_standard_library
Internet protocol
another IP packet. To encapsulate an IP packet in another IP packet, an outer header is added with Source IP, the entry point of the tunnel, and Destination
IP_in_IP
Messaging protocol for web services
message. SOAP header block A SOAP header can contain more than one of these blocks, each being a discrete computational block within the header. In general
SOAP
control plane data; header compression; ciphering; integrity protection. The header compression technique can be based on either IP header compression (RFC
Packet Data Convergence Protocol
Packet_Data_Convergence_Protocol
Rewriting an email message sender address
possibility is to store the long rewritten address somewhere in the message header. The i= tag of a DKIM-Signature may be a good place, as such choice considerably
Sender_Rewriting_Scheme
Software acting on behalf of a user
client–server system. The HTTP User-Agent header is intended to clearly identify the agent to the server. However, this header can be omitted or spoofed, so some
User_agent
Proposed web cryptography standard
the JWT, typically in the Authorization HTTP header using the Bearer schema. The content of the header might look like the following: Authorization:
JSON_Web_Token
Way to traverse IP address spaces without routing
address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device. The
Network_address_translation
Static Context Header Compression (SCHC) is a standard compression and fragmentation mechanism defined in the IPv6 over LPWAN working group at the IETF
Static Context Header Compression
Static_Context_Header_Compression
field is known as the Header Error Control/Check (HEC) field. It consists of the remainder of the division of the 32 bits of the header (taken as the coefficients
CRC-based_framing
GSM SMS metadata
User Data Header (UDH) is a binary structure which may be present at the start of a short message in the Short Message Service in GSM. It does not contain
User_Data_Header
Layer 2 network routing loop
rebroadcast the broadcast messages flooding the network. Since the layer-2 header does not include a time to live (TTL) field, if a frame is sent into a looped
Switching_loop
An air cooler header box also referred to as a header, header manifold, or end box is a rectangular, welded pressure-vessel assembly that terminates each
Air_Cooler_Header_Box
System to prevent email fraud
the signature must cover the From field. Within the DKIM-Signature mail header, the d= (domain) and s= (selector) tags specify where in DNS to retrieve
DMARC
Email authentication method designed to associate a domain with a message stream
length h (required), header fields - list of those that have been signed z (optional), header fields - copy of selected header fields and values bh (required)
DomainKeys_Identified_Mail
HTTP header field
In HTTP, "Referer" (a misspelling of "Referrer") is an optional HTTP header field that identifies the address of the web page (i.e., the URI or IRI) from
HTTP_referer
Protocol for delivering audio and video over IP networks
application begins with the RTP packet header. The RTP header has a minimum size of 12 bytes. After the header, optional header extensions may be present. This
Real-time_Transport_Protocol
HTTP response status code
com/newpage.html"); Here is an example using a PHP redirect: <?php header("Location: https://example.com/newpage.html", true, 301); exit; Here is
HTTP_301
Serial interface for testing integrated circuits
Development boards usually include a header to support preferred development tools; in some cases, they include multiple such headers because they need to support
JTAG
Macro guard in C/C++ to block multiple inclusions
programming languages, an #include guard, sometimes called a macro guard, header guard or file guard, is a way to avoid the problem of double inclusion when
Include_guard
English footballer (born 1990)
He scored his first goal of the 2021–22 season glancing home a near-post header from a Leandro Trossard cross, scoring Albion's second in a 2–1 home victory
Danny_Welbeck
Architecture term for a layer of the same unit running horizontally in a wall
header is used to bind the two wythes together. Header course: This is a course made up of a row of headers. Bond course: This is a course of headers
Course_(architecture)
Communication protocol
scope. For all types of LSAs, there are 20-byte LSA headers. One of the fields of the LSA header is the link-state ID. Each router link is defined as
Link-state_advertisement
Capability that can be built into web servers and web clients
Transfer-Encoding header field may indicate the payload of an HTTP message is compressed. At a higher level, a Content-Encoding header field may indicate
HTTP_compression
1995 video game
Bases Loaded '96: Double Header is a 1995 baseball video game developed and published by Jaleco for the PlayStation and Sega Saturn. This game was the
Bases Loaded '96: Double Header
Bases_Loaded_'96:_Double_Header
Error checking feature of some header data structures
A header check sequence (HCS) is an error checking feature for various header data structures, such as in the media access control (MAC) header of Ethernet
Header_check_sequence
placement of code and data within specific areas of memory. The file includes a header and separate areas of read-only and read-write code/data. It can optionally
Arm_Image_Format
Automated message from an email system
Return-Path. The MDA also removes bogus Return-Path header fields inserted by other MTAs; this header field is generally guaranteed to reflect the last
Bounce_message
C standard library header file
also available in the C++ standard library, though in different headers (the C headers are included as well, but only as a deprecated compatibility feature)
C_mathematical_functions
Ethernet networking standard
multiple-VLAN-header context, out of convenience, the term VLAN tag or just tag for short is often used in place of 802.1Q VLAN header. QinQ allows multiple
IEEE_802.1ad
Competitive rodeo team sport
Corriente) and two mounted riders. The first roper is referred to as the "header", the person who ropes the front of the steer, usually around the horns
Team_roping
explicitly noted as such. SIP responses may also include an optional Warning header, containing additional details about the response. The Warning contains
List_of_SIP_response_codes
System for dealing with email spam
For email uses, a textual encoding of a hashcash stamp is added to the header of an email to prove the sender has expended a modest amount of CPU time
Hashcash
File format and file archiver program
bytes. The header uses 257 bytes, then is padded with NUL bytes to make it fill a 512 byte record. There is no "magic number" in the header, for file identification
Tar_(computing)
Library provided with a programming language to provide common services
In computer programming, a standard library is the library made available across implementations of a programming language. Often, a standard library is
Standard_library
HeaderDoc is a documentation generator developed and maintained by Apple Inc. Using specially commented source code files as input, HeaderDoc generates
HeaderDoc
ePrix were double header events. The 2027 Monaco ePrix will be a double header event The 2017, 2023–2026 Berlin ePrix were double header events. The 2027
List_of_Formula_E_ePrix
Special kind of Usenet post used to control news servers
posts by a header field named Control. The body of the field contains control name and arguments. There are two historical alternatives to header field Control
Control_message
Data item stored in a browser by a website
added a Set-Cookie2 header field, which informally came to be called "RFC 2965-style cookies" as opposed to the original Set-Cookie header field which was
HTTP_cookie
IETF working group
participate in the Internet of Things. The 6LoWPAN group defined encapsulation, header compression, neighbor discovery and other mechanisms that allow IPv6 to
6LoWPAN
Communication protocol design method
Encapsulation is the computer-networking process of concatenating layer-specific headers or trailers with a service data unit (i.e. a payload) for transmitting
Encapsulation_(networking)
Network protocol
header follows the 802.2 LLC header if the destination SAP (DSAP) and the source SAP (SSAP) contain hexadecimal values of AA or AB: The SNAP header consists
Subnetwork_Access_Protocol
HEADER
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HEADER