The more times a user is logged in to the network, the harder it is to determine if that user is really the person who logged in.

Limiting the number of concurrent connections to two or even one makes tracking users’ network access easier and provides an additional level of security by reducing the number of Iogged in but unattended workstations.

Administrator accounts, in particular, should have limited concurrent connections. If an administrator should receive a denied login due to a current connections limit he would immediately know that his account had been compromised, or that another login had been inadvertently left active.