The telecommunications and network security domain addresses communications and network security. Mastery of this domain requires you to fully understand voice and data communications, as well as the countermeasures that can be implemented to protect these systems.
If you have spent some time working in this segment of IT security management, you might need only a quick review of the material. If your work has led you to concentrate in other domains, you will want to spend some time here reviewing the content because this is a large domain with many potential exam questions.
To be fully prepared for the exam, you will need to understand the data communication process and how it relates to network security. Knowledge of remote access, the use of firewalls, network equipment, and network protocols is also required. Being adept in network security also requires that you understand the techniques used for preventing network-based attacks.