Oracle sqlnet
NET8 (called SQL*NET prior to Oracle8) is Oracle's client/server middleware product that offers transparent connection from client tools to the database, or from one database to another. SQL*Net/ Net8 works across multiple network protocols and operating systems.
TNS or Transparent Network Substrate is Oracle's networking architecture. TNS provides a uniform application interface to enable network applications to access the underlying network protocols transparently.
The TNS architecture consists of three software components: TNS-based applications, Oracle Protocol Adapters (OPA), and networking software like TCP/IP.
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