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E Edge router A device in an Asynchronous Transfer Mode (ATM) network that routes data between an ATM backbone network and local area networks (LANs). Edge routers can be used to translate Ethernet or Token Ring data for transmission over ATM backbones. This allows ATM to be used as a backbone for connecting multiple LANs into a metropolitan area network (MAN) or wide area network (WAN). An alternative and more commonly used configuration is to connect LAN networking equipment directly to ATM backbone switches, which provide points of contact with an ATM provider’s backbone network. An edge router can function as an ATM switch and provide routing capabilities for LAN networking protocols—all in one hybrid device Encryption The process of rendering a message (or data) unusable to all but the intended recipients, who have the ability to decrypt it. Cryptography is the science of creating workable procedures for encrypting and decrypting messages. The goal is to ensure that a message intercepted by a distrusted user cannot be decrypted in a feasible amount of time. Ethernet The most popular network architecture for local area networks (LANs). Ethernet was originally developed by Xerox in the 1970s and was proposed as a standard by Xerox, Digital Equipment Corporation (DEC), and Intel in 1980. A separate standardization process for Ethernet technologies was established in 1985 in the Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard known as Project 802. The IEEE standard was then adopted by the International Organization for Standardization (ISO), making it a worldwide standard for networking. Because of its simplicity and reliability, Ethernet is by far the most popular networking architecture used today. It is available in three different speeds:
1000 Mbps or 1 Gbps, which is an emerging standard called Gigabit Ethernet
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