Electronic Data Interchange :-

Abbreviated EDI. A method of electronically exchanging business documents, including bills of materials, purchase orders, and invoices. Customers and suppliers can establish an EDI network by means of Open Systems Interconnect (OSI) standards, or by using proprietary products. Widely accepted standards include ANSI X.1'2, ISC) 9735, and CCITT X.435.

E-mail:-

The use of a network to transmit text messages, memos, and reports, also called electronic mail. Users can send a message to one or more individuals, to a predefined group, or to all users on the system. When you receive a message, you can read, print, forward, answer, or delete it. An e-mail system may be implemented on a peer-to-peer network, a client/server architecture, a mainframe computer, or on a dial-up service, such as CompuServe, GEnie, or MCI Mail. E-mail is by far the most popular Internet application, with well over 80 percent of Internet users taking advantage of the service.

E-mail has several advantages over conventional mail systems, including:

• E-mail is fast-very fast when compared to conventional mail.

• If something exists on your computer as a file-text, graphical images, even program files and video segments-you can usually send it as e-mail. The problems associated with e-mail are similar to those associated with online communications in general: security, privacy (always assume that your e-mail is not private), and the legal status of documents exchanged electronically.

Emulator:-

A device built to work exactly like another device-hardware, software, or a combination of both. For example, a terminal emulation program lets a PC pretend to be a terminal attached to a mainframe computer or to an online service by providing the control codes that the remote system expects to receive.

Enable Login:-

A Novell NetWare server utility used to re-enable a login after it has been disabled with the DISABLE LOGIN command.

Encryption:-

The process of encoding information in an attempt to make it secure from unauthorized access. The reverse of this process is known as decryption. There are two main encryption schemes in common use:

• Private (Symmetrical) Key Schemes: An encryption algorithm based on a private encryption key known to both the sender and the recipient of the information. The encrypted message is unreadable, and can be transmitted over non-secure systems.

• Public (Asymmetrical) Key Schemes: An encryption scheme based on using the two halves of a long bit sequence as encryption keys. Either half of the bit sequence can be used to encrypt the data, but the other half is required to decrypt the data.

Enterprise Network Services:-

Abbreviated ENS. A software product based on Banayan Systems StreetTalk Directory Service for VINES that brings global directory service features to other networks. ENS includes Street-Talk Directory Assistance, the Banyan Security Service, and Banyan Network Management. Specific versions of ENS are available for Novell NetWare, SCO UNIX, and HP-UX, so that servers running those operating systems can interoperate and share management in a network with VINES servers.

Enterprise Network:-

A network that connects every computer in every location of a business group, organization, or corporation, and runs the company's mission-critical applications.

In many cases an enterprise network will include several different types of computers running different operating systems and attached to different kinds of networks.

Ethernet:-

A popular network protocol and cabling scheme with a transfer rate of 10 megabits per second, originally developed by Xerox in 1976( Ethernet uses a bus topology and network nodes are connected by either thick or thin coaxial cable, fiber-optic cable, or twisted-pair cable.

Ethernet uses CSMA/CD (Carrier Sense Multiple Access/Collision Detection) to prevent network failures or collisions when two devices try to access the network at exactly the same time. The original DIX (Digital Equipment, Intel, Xerox), or Blue Book, standard has evolved into the slightly more complex IEEE 802.3 standard, and the ISO's 802.3 specification.

Ethernet packet:-

A variable length unit in which information is transmitted on an Ethernet network. An Ethernet packet consists of a synchronization preamble, a destination address, a source address, a type code indicator, a date field that can vary from 46 to 1500 bytes, and a cyclical redundancy check (CRC) that provides a statistically derived valued used to confirm the accuracy of the data. See the accompanying illustration of an IEEE 802.3 Ethernet packet.

Ether Talk:-

An implementation of the Ethernet local-area network (LAN) developed for Apple computers, designed to work with the AppleShare network operating system. Ether Talk operates over coaxial cable at the Ethernet transfer rate of 10 megabits per second, much faster than the 230.4 kilobits per second rate available with Apple Talk. Each networked Macintosh computer must be supplied with a special Ether Talk network interface card.

Extended LAN:-

A term used to describe a network that consists of a series of local-area networks (LANs) connected by bridges.