Daytime
| Daytime Protocol | |||||||||||||||||||||||||
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| Operation area: | Troubleshooting and measurements on network lines |
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| Standards: | RFC 867 ( 1983 ) | ||||||||||||||||||||||||
Daytime is a simple ASCII -based network protocol that can use TCP or UDP via port 13 to transfer data .
After establishing a connection (TCP) or receiving a UDP packet, the current date and time are sent in one line from the time server to the client. Typically, the service is queried using the Telnet command line program :
$ telnet daytime-server 13 Trying daytime-server... Connected to daytime-server. Escape character is '^]'. Fr Feb 24 17:52:30 CET 2006 Connection closed.
In contrast to time synchronization protocols such as the Network Time Protocol (NTP), Daytime was developed for troubleshooting and for measurements on network lines. The time stamp sent in plain text can be read by humans without any problems and used, for example, to estimate the runtime or, in general, to check the availability of a server instead of pinging .