Справочник Пользователя для Cyclades Marine Instruments 2.3.0

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been ignored by the client, the server assumes the worst and 
the connection is closed. 

The keepalive timer provides the capability to know if the 

client's host has either crashed and is down or crashed and 
rebooted. 

A terminal emulation program for TCP/IP networks such as 

the Internet. The Telnet program runs on your computer and 
connects your PC to a server on the network. You can then 
enter commands through the Telnet program and they will be 
executed as if you were entering them directly on the server 
console

A terminal server has one Ethernet LAN port and many 
RS-232 serial ports. It is used to connect many terminals to 

the network. Because they have the same physical interfaces, 
terminal servers are sometimes used as console access 
servers. 

1. In Unix, refers to any terminal; sometimes used to refer to 

the particular terminal controlling a given job (it is also the 
name of a Unix command which outputs the name of the 
current controlling terminal). 2. Also in Unix, any serial port, 
whether or not the device connected to it is a terminal; so 
called because under Unix such devices have names of the 
form tty.  

User Datagram Protocol uses a special type of packet called 

a datagram. Datagrams do not require a response; they are 
one way only (connectionless). Datagrams are usually used 
for streaming media because an occasional packet loss will 
not affect the final product of the transmission. 

A standard computer rack has an internal width of 17 inches. 

Rack space on a standard rack is measured in units of height 
(U). One U is 1.75 inches. A device that has a height of 3.5 
inches takes 2U of rack space.