12-07-2000
TCP vs UDP
UDP can also be used in noisy environments; however the transmission control protocol that manages packet loss, sequencing, etc. must be higher in the protocol stack.
TCP does the 'transmission reliability' transparent to the application programmer. However, this does not preclude the use of higher level 'transmission reliability' on top of UDP systems.
In fact, I have worked with many companies who had issues with the overhead associated with TCP and rebuilt the transmission control model on top of UDP or RAW SOCKETS.
TCP is designed for a generic Internet end-to-end model; however it is not perfect or the most efficient for all transmission models. It is inaccurate to translate 'connectionless' UDP vs. 'connection oriented' TCP to 'unrealiable' and 'reliable'. TCP is connection oriented. UDP is not connection oriented. UDP can be used in applications where connection oriented behavior is required, it just must be done in a higher level in the stack.
We would have to start a new forum 'Advanced UNIX' or 'Advanced Networking' to further discuss, as this is not a newbies topic.
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ESD(1) Enlightened Sound Daemon ESD(1)
NAME
esd - The Enlightened Sound Daemon
DESCRIPTION
Starts up EsounD, which provides a sound mixing server.
USAGE
esd [options]
-d DEVICE force esd to use sound device DEVICE
-b run server in 8 bit sound mode
-r RATE run server at sample rate of RATE
-as SECS free audio device after SECS of inactivity (-1 to disable)
-unix use unix domain sockets instead of tcp/ip
-tcp use tcp/ip sockets instead of unix domain
-public make tcp/ip access public (other than localhost)
-promiscuous start unlocked and owned (disable authenticaton) NOT RECOMMENDED
-terminate terminate esd daemon after last client exits
-noterminate do not terminate esd daemon after last client exits
-nobeeps disable startup beeps
-beeps enable startup beeps
-trust start esd even if use of /tmp/.esd can be insecure
-port PORT listen for connections at PORT (only for tcp/ip)
-bind ADDRESS binds to ADDRESS (only for tcp/ip)
-v --version print version information
Possible devices are: /dev/dsp, /dev/dsp2, etc.
FILES
/etc/esd.conf daemon configuration file
SEE ALSO
esdcat(1), esddsp(1), esdloop(1), esdplay(1), esdsample(1), esd-config(1), esdctl(1), esdfilt(1), esdmon(1), esdrec(1)
3rd Berkeley Distribution EsounD 0.2.41 ESD(1)