Advanced Server Overview and Installation

Advanced Server for UNIX architecture Network communication

Product Manual U7613-J-Z815-6-76

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