In computer networking, Semaphore Flag Signaling System (SFSS) is a humorous proposal to carry Internet Protocol (IP) traffic by semaphores. Semaphore Flag Signaling System was initially described in RFC 4824,[1] an April Fools' Day RFC issued by the Internet Engineering Task Force edited by J. Hofmueller, et al. and released on April Fools' Day 2007. It is one of several April 1 RFCs.
^J. Hofmueller; A. Bachmann; IO. zmoelnig, eds. (1 April 2007). The Transmission of IP Datagrams over the Semaphore Flag Signaling System (SFSS). Network Working Group. doi:10.17487/RFC4824. RFC 4824. Informational. This is an April Fools' Day Request for Comments.
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Flagsemaphore (from the Ancient Greek σῆμα (sêma) 'sign' and -φέρω (-phero) '-bearer') is a semaphoresystem conveying information at a distance by means...
applications. Maritime flagsignalling has a long history, especially prior to the advent of radio, and remains the preferred means of signaling in many situations...
visual signal transmitted over distance. A semaphore can be performed with devices including: fire, lights, flags, sunlight, and moving arms. Semaphores can...
International Code of Signals (whether by flaghoist, semaphore, signal lamp, or other means), which specifies a standard set of flags and codes. Naval vessels...
Optical communication Polybius square Railway signalling San Jose SemaphoreSemaphoreFlagSignalingSystemSignal lamp Telegraph Hill, for a list of telegraph...
International maritime signalflags are various flags used to communicate with ships. The principal system of flags and associated codes is the International...
safety of navigation and related matters. Signals can be sent by flaghoist, signal lamp ("blinker"), flagsemaphore, radiotelegraphy, and radiotelephony....
Naval flagsignalling covers various forms of flagsignalling, such as semaphore or flaghoist, used by various navies; distinguished from maritime flag signalling...
maritime environment, where semaphore is used). Many flags fall into groups of similar designs called flag families. The study of flags is known as "vexillology"...
synchronization process, the time difference amounted to less than one minute. SemaphoreFlagSignalingSystemFlagsemaphore Heliograph Railway signalling...
interim. Hyper Text Coffee Pot Control Protocol Pigeon post SemaphoreFlagSignalingSystem Sneakernet B. Carpenter; R. Hinden (1 April 2011). Adaptation...
standard or system for railroad signaling in North America. Individual railroad corporations are free to devise their own signalingsystems as long as...
any fog-signaling apparatus Firing a gun or other explosive signal at intervals of about a minute Flying the international maritime signalflags NC Displaying...
Student Society, a student group at Simon Fraser University SemaphoreFlagSignalingSystem, a fictional internet standard for transmitting Internet Protocol...
Railway signalling (BE), or railroad signaling (AE), is a system used to control the movement of railway traffic. Trains move on fixed rails, making them...
1919 Popular Science article about a method to replace semaphoreflags with a swinging dot signal: Wigwagging is Now Done by Machine, Popular Science monthly...
bearing the message. Thus flagsemaphore is a method of telegraphy, whereas pigeon post is not. Ancient signallingsystems, although sometimes quite extensive...
'complete with tail lamp'. Automatic block signaling uses a series of automated signals, normally lights or flags, that change their display, or aspect, based...
Aircraft can acknowledge signals by rocking their wings or flashing their landing lights. Colt Acetylene Flash Lantern Flagsemaphore Heliograph VS-17 Walter...
communication. Visual techniques such as smoke signals, beacon fires, hydraulic telegraphs, ship flags and semaphore lines were the earliest forms of optical...
connected private tracks. The first signallingsystem on the Norwegian railway system was a mechanically operated semaphoresystem introduced at Drammen station...
of pole-and-arm optical telegraph, flagsemaphore, heliograph, slat semaphore, and port-specific signals (like flag and ball weather warnings). The most...