DAYTIME
Encyclopedia
The Daytime Protocol is a service in the Internet Protocol Suite
, defined in 1983 in RFC 867. It is intended for testing and measurement purposes in computer network
s.
A host may connect to a server that supports the Daytime Protocol on either Transmission Control Protocol
(TCP) or User Datagram Protocol
(UDP) port 13. The server returns an ASCII character string of the current date and time in an unspecified format.
operating systems a daytime server is usually built into the inetd
(or xinetd) daemon
. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration:
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
An example output may be:
Tuesday, February 22, 1982 18:45:59-PST
Internet protocol suite
The Internet protocol suite is the set of communications protocols used for the Internet and other similar networks. It is commonly known as TCP/IP from its most important protocols: Transmission Control Protocol and Internet Protocol , which were the first networking protocols defined in this...
, defined in 1983 in RFC 867. It is intended for testing and measurement purposes in computer network
Computer network
A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information....
s.
A host may connect to a server that supports the Daytime Protocol on either Transmission Control Protocol
Transmission Control Protocol
The Transmission Control Protocol is one of the core protocols of the Internet Protocol Suite. TCP is one of the two original components of the suite, complementing the Internet Protocol , and therefore the entire suite is commonly referred to as TCP/IP...
(TCP) or User Datagram Protocol
User Datagram Protocol
The User Datagram Protocol is one of the core members of the Internet Protocol Suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol network without requiring...
(UDP) port 13. The server returns an ASCII character string of the current date and time in an unspecified format.
Inetd implementation
On UNIX-likeUnix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....
operating systems a daytime server is usually built into the inetd
Inetd
inetd is a super-server daemon on many Unix systems that manages Internet services. First appearing in 4.3BSD , it is generally located at /usr/sbin/inetd.-Function:...
(or xinetd) daemon
Daemon (computer software)
In Unix and other multitasking computer operating systems, a daemon is a computer program that runs as a background process, rather than being under the direct control of an interactive user...
. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration:
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
An example output may be:
Tuesday, February 22, 1982 18:45:59-PST
See also
- List of well-known ports
- Echo ProtocolECHO protocolThe Echo Protocol is a service in the Internet Protocol Suite defined in RFC 862. It was originally proposed for testing and measurement of round-trip times in IP networks....
- Time ProtocolTIME protocolThe Time Protocol is a network protocol in the Internet Protocol Suite defined in 1983 in RFC 868. Its purpose is to provide a site-independent, machine readable date and time....
- Network Time ProtocolNetwork Time ProtocolThe Network Time Protocol is a protocol and software implementation for synchronizing the clocks of computer systems over packet-switched, variable-latency data networks. Originally designed by David L...