o one "fat" pipe, which is what a multiplexer does, an inverse multiplexer separates out channels into smaller "chunks." Inverse multiplexers are used for video conferencing, where the 24 channels might be transmitted in groups of 6 channels at a speed of 386Mbps. IPsec (Internet Protocol Security) A protocol that establishes a secure, encrypted link to a security device at the carrier or the enterprise. It is used for remote access to corporate services (such as e-mail) in conjunction with VPNs. IPv4 (Internet Protocol version 4) An older addressing format for networks. Each device on an Internet network is assigned a 32-bit IP address. This limits the total number of addresses available. IPv6 (Internet Protocol version 6) A newer Internet protocol format that specifies 32-bit IP addresses. This increases the number of addresses available in networks and on the Internet. IPv6 also has additional security. ISDN (Integrated Services Digital Network) A digital network standard that lets users send voice, data, and video over one telephone line from a common network interface. ISP (Internet Service Provider) An organization that connects end users to the Internet via broadband, mobile networks, and dial-up telephone lines. ISPs often own Internet backbone networks. ISPs supply services such as voicemail, hosting, and domain name registration. IXCs (Interexchange Carriers) www.TechnicalPDF.com The long-distance companies that sell toll-free 800, international, data networking, and outgoing telephone service on an interstate basis. They now also sell local telecommunications services. A programming language created by Sun Microsystems. Multiple types of computers can read Java programs. They increase the power of the Internet because programs written in Java (called applets) can be downloaded temporarily by client computers. They do not take up permanent space on the client hard drive. Interactive games can use Java programs. LAN (Local Area Network) Enables computer devices such as personal computers, printers, alarm