Other applications can use Sun’s External Data Representation (XDR) or IBM’s (and Microsoft’s) NetBIOS programming libraries for presentation services. For example, applications can use a character-based presentation service called the Network Virtual Terminal (NVT), part of the Internet’s telnet remote access specification. Programmers are on their own, but this does not mean they have to create everything from scratch. TCP/IP does not provide session or presentation services directly to an application. Walter Goralski, in The Illustrated Network (Second Edition), 2017 Applications in TCP/IP
#Setting up remote management in mototrbo cps full#
To enable full duplex, ECHO (described in RFC 857) and SUPPRESS GO AHEAD (described in RFC 858) must be enabled at both ends (responses from the remote are shown indented for clarity purposes): The alternative to half-duplex is full-duplex, where both terminals can communicate in both directions at the same time.
Segment transmission also implies a duplex switch, so there is no need to handle the GO AHEAD commands for simple systems. In practice, this is not necessary, and characters can be sent and received at any time, with each character possibly occupying one full TCP segment if they are typed slowly enough. Only when the line is completed (or after a time-out) the buffer is sent to the other end as a single TCP segment. User input is locally echoed to the screen as soon as typed and stored in a local buffer. In half-duplex, only one terminal sends data at a time.
The default NVT-ASCII terminal is a half duplex device that ideally waits for a GO AHEAD command to be sent from the other end before transmitting its data to the line.
Edward Insam PhD, BSc, in TCP/IP Embedded Internet Applications, 2003 Half/full-duplex
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