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Client/Server Communications

In This Chapter
Client/Server Architecture
Network Protocol
Network Programming Interface
Database Server Connection
Multiplexed Connection
Connections That the Database Server Supports
Local Connections
Shared-Memory Connections
Stream-Pipe Connections
Local-Loopback Connections
Coserver Client Connections
Communication Support Services
IBM Informix Password Communication Support Module
Connectivity Files
Network-Configuration Files
TCP/IP Connectivity Files
Multiple TCP/IP Ports
IPX/SPX Connectivity Files
Network-Security Files
The hosts.equiv File
The netrc Information
CSM Configuration File
Format of the CSM Configuration File
The concsm.cfg Entry for Password Encryption
The sqlhosts File
The sqlhosts Information
Connectivity Information
Database Server Name
The Connection Type Field
Host Name Field
Service Name Field
Options Field
Group Information
Database Server Group
Group Keyword in the Connection-Type Field
Alternatives for TCP/IP Connections
IP Addresses for TCP/IP Connections
Wildcard Addressing for TCP/IP Connections
Port Numbers for TCP/IP Connections
ONCONFIG Parameters for Connectivity
COSERVER Configuration Parameter
DBSERVERNAME Configuration Parameter
DBSERVERALIASES Configuration Parameter
NETTYPE Configuration Parameter
Environment Variables for Network Connections
Examples of Client/Server Configurations
Using a Shared-Memory Connection
Using a Local-Loopback Connection
Using a Network Connection
The sqlhosts File Entry for IPX/SPX
Using Multiple Connection Types
Accessing Multiple Database Servers
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