Network access control is achieved in several ways – the most common is setting up an authentication process for each network user, which is usually done by creating a username and password with test questions, login credentials and any other additional clearances desired. Such clearances are set by the main administration. Although network access control is used in securing the network, it is not the only security measure available to be used.

When setting network access control, the administration could assign only a set of privileges for each user. For instance, technical support associates can be given access to the software program used, accountants can be allowed to access on accounting programs, while sales staff can only access the sales database. These privileges are usually connected to the job or management level of each user. However, administrations can easily grant access or limitations for parts of the network to any user, if needed.

Along with network access control, other security measures like firewall installation, antivirus software and spyware detection programs can help in reducing attacks that may come from outside the network.