E


EAP (Extensible Authentication Protocol)

An extension of the PPP protocol that supports authentication methods more secure than a standard username and password combination. EAP is commonly used as an authentication protocol for token cards, smart cards, and digital certificates.



EMI (electromagnetic interference)

External interference of electromagnetic signals that causes a reduction of data integrity and increased error rates in a transmission medium.



encapsulation

A technique used by protocols in which header and/or trailer information is added to the protocol data unit as it is passed down through the protocol stack on a sending system. The reverse process, called decapsulation, is performed at the receiving system as the packet travels up through the protocol suite.



encryption

The modification of data for security purposes prior to transmission so that it is not comprehendible without the decoding method.



ESD (electrostatic discharge)

A condition that is created when two objects of dissimilar electrical charge come into contact with each other. The result is that a charge from the object with the higher electrical charge discharges itself into the object with the lower-level charge. This discharge can be extremely harmful to computer components and circuit boards.



Ethernet

The most common LAN technology. Ethernet can be implemented using coaxial, twisted-pair, or fiber-optic cable. Ethernet typically uses the CSMA/CD media access method and has various implementation standards.



Event Viewer

A utility that facilitates the viewing of log files on Windows server operating systems.



EXT2

The default file system used in Linux systems.





    Network+ Exam Cram 2
    Network+ Exam Cram 2
    ISBN: 078974905X
    EAN: N/A
    Year: 2003
    Pages: 194

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