The number of worldwide VoIP customers is well over 38 million. Thanks to the popularity of inexpensive, high-quality services, it's projected to increase to ne

Communications represent a strategic sector for privacy protection and for personal, company, national and international security. The interception, damage or l

Go under the hood of an operating Voice over IP network, and build your knowledge of the protocols and architectures used by this Internet telephony technology.

Certification study guide and companion reference textbook for the TCO Certified VoIP Analyst (CVA) courses and exams. The CVA Study Guide corresponds directly

The Handbook of Information Security is a definitive 3-volume handbook that offers coverage of both established and cutting-edge theories and developments on in