... beginning andending of each IP datagram.Server A device that stores data, organizes and maintains databases, and deliverscopies of data files to clients on demand. A process that stores and distributes ... 97VLAN-unaware station, 97Virtual private network (VPN), 10 7–20authentication, 11 3, 11 4 15 , 11 7encryption, 11 3 14 extranet VPN, 11 9firewall, 11 6 18 IP security, 11 4 15 Internet facilities, 10 7intracompany ... 10 7intracompany VPN, 11 9intranet VPN, 11 9leased facilities, 10 7privacy, 10 9private facilities, 10 7proxies, 11 0 11 remote access VPN, 11 9tunnels, 11 1 12 types of, 11 8–20Voice over IP (VoIP),...