Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlement

"This book is like a good tour guide.It doesn't just describe the major attractions; you share in the history, spirit, language, and culture of the place." --He

AN UNCONVENTIONAL, FUN WAY TO MASTER THE BASICS OF CRYPTOGRAPHY Cryptography is not just for specialists. Now every wireless message, wireless phone call, onlin

State-of-the-art SIP primer SIP (Session Initiation Protocol) is the open standard that will make IP telephony an irresistible force in communications, doing fo

This handbook is designed to demystify IP telephony for business people and technology generalists. It discusses: IP protocol breakdown -SIP, H.323, Megaco/H.24