JDBC and jConnect provide access to Sybase IQ for Java-based applications.
JDBC (Java Database Connectivity) is a Java application programming interface (API) that provides programmatic access to Sybase IQ. jConnect is a Sybase utility that provides high-performance native access to all Sybase products as a standard installation option.
Sybase Central and Interactive SQL (dbisql) can use either JDBC or ODBC connectivity.
See the SQL Anywhere documentation: SQL Anywhere 11.0.1 > SQL Anywhere Server - Programming > SQL Anywhere Data Access APIs > SQL Anywhere JDBC driver
The SQL Anywhere JDBC driver is the default driver for Sybase Central and Interactive SQL.
IQ Agent can use only jConnect with JDBC to connect to a multiplex server. The jConnect JDBC drivers have been certified with simplex and multiplex servers.