Technical data

7
Connectivity Services
Compaq TCP/IP Services provides several ways to connect to the network. This
chapter discusses the following connectivity methods:
•TELNET
• PPP and SLIP
•NFS
•XDM
• DECnet over TCP/IP
Things to Consider
In planning your TCP/IP Services for OpenVMS configuration, consider the
following:
• Should I configure SLIP or PPP?
• Should I configure for DECnet over TCP/IP?
•DoIneedtosetupNFS?
7.1 TELNET
TELNET is a standard protocol that provides remote terminal connection or login
service. TELNET enables users at one site to interact with a remote system at
another site, as if the user terminals were connected directly to the remote system.
The Compaq TCP/IP Services for OpenVMS product implements TELNET to
provide:
• Simultaneous multiple sessions
• IBM 3270 terminal emulation (TN3270)
• Two supported interface formats: DCL style and UNIX style
For more information about managing TELNET, refer to the Compaq TCP/IP
Services for OpenVMS Management guide. For more information about using
TELNET, refer to the Compaq TCP/IP Services for OpenVMS User’s Guide.
7.2 PPP and SLIP
At the Network Interface layer, standard encapsulation of IP packets are defined
for the various hardware types. For example, Ethernet uses the Ethernet frame
standard to enclose the data being sent with header fields. Serial line connections
use either the Serial Line Internet Protocol (SLIP or CSLIP) or the Point-to-Point
Protocol (PPP) (Alpha only).
7.2.1 Assigning an IP Address to Your PPP or SLIP Interface
Every network interface must have its own unique IP address. Interfaces cannot
share IP addresses.
If you configure PPP interfaces for multiple remote hosts, the remote hosts can
obtain their individual IP addresses from your host when they connect. Similarly,
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