This document summarizes the Oracle networking configuration files listener.ora, tnsnames.ora, and sqlnet.ora. It explains that listener.ora contains server-side configuration and is located in the ORACLE_HOME/network/admin directory. Tnsnames.ora contains client-side configuration and is also in ORACLE_HOME/network/admin, and present on both clients and servers. Sqlnet.ora also contains client configuration. The document provides examples for configuring these files to allow a client and server to communicate.