Traditionally, remote administrative access on routers was configured using Telnet on TCP port 23. However, Telnet was developed in the days when security was not an issue. For this reason, all Telnet traffic is forwarded in plain text. SSH has replaced Telnet as the best practice for providing remote router administration with connections that support strong privacy and session integrity. SSH uses port TCP 22. It provides functionality that is similar to that of an outbound Telnet connection, except that the connection is encrypted. With authentication and encryption, SSH allows for secure communications over an insecure network. In this configuration, four routers are interconnected in a hub-and-spoke Frame Relay configuration. Router R1 is the hub, and routers R2, R3, and R4 are the spokes. Dynamic routing has been configured using multiarea OSPF.