native protocol

type 4 uses thin protocol of specified vendor say oracle is
jdbc:oracle:thin:@systemname:1521:oracleservicename

A native-protocol fully Java technology-enabled driver
converts JDBC technology calls into the network protocol
used by DBMSs directly. This allows a direct call from the
client machine to the DBMS server and is a practical
solution for Intranet access. Since many of these protocols
are proprietary the database vendors themselves will be the
primary source for this style of driver. Several database
vendors have these in progress.

(jdbc:mysql://localhost:port no.//batabase","root","passwd");