THIS NEW EDITION OF VOLUME 1: * Explains how voice and video are sent over IP internets and how IP Telephony operates * Describes Mobile IP (a technology that allows a computer to move from one network to another without changing its IP address) * Discusses IP security and the security standard, IPsec * Revises the discussion of Ipv6 to incorporate the latest changes * Shows how to interconnect private intranets and the global Internet using Virtual Private Network (VPN) and Network Address Translation (NAT) technologies * Expands the description of IP multicasting to cover multicast routing protocols * Presents the Differentiated Services (DiffServe) scheme for classes of services as well at Path MTU discovery and routing for anonymous serial networks * Explains Random Early Discard (RED), which is now recommended for routers * Updates the coverage of all protocols to the latest versions, including RIP, IGMP, and SNMP