Siemens Unix V4.0 - Manual (Page 41)

Advanced Server for UNIX architecture Network communication
Product Manual U7613-J-Z815-6-76
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3.2 Network communication
A workstation and an Advanced Server for UNIX communicate in the network using several
protocol layers. NetBIOS is implemented in accordance with RFC1001/2. This NetBIOS
implementation is based on the standard protocol TCP/IP. The following diagram illustrates
the way in which the individual modules work together in the communication process.
Communication architecture of Advanced Server for UNIX
● This diagram is a simplified illustration of the communication architecture, other
products such as CMX, for example, may be required for communications
controllers.
● Depending on the UNIX system implemented
–
there are different connection options
– communications controllers and card drivers are required
– several communications controllers can be implemented simultaneously.
The NetBIOS component of the operating system kernel is implemented in the streams
architecture. The library NB-Lib in Advanced Server for UNIX allows access to the NetBIOS
streams driver using the standard interface TLI. Access to TCP/IP takes place via the
NetBIOS streams driver. Parallel access to TCP/IP is possible via the socket interface.
Advanced Server for UNIX
NB-LIB
RFC 1001/2
TCP/IP application
TCP/IP
WAN driver Token Ring driver Ethernet driver
Communications
controller for Token Ring Communications controller
for Ethernet
Communications
controller for WAN
HDLC, X.25, or
ISDN
LAN
Token Ring
LAN
Ethernet
Sockets
TLI
i