E

EAP Transport Level Security (EAP-TLS)

The strongest method of encryption in use today. Requires a certificate-based security environment. This protocol provides for mutual authentication and negotiation of other security protocols.

echo reply packets

Special packets received by computers when network utilities are used. When these packets are received, the connectivity between network devices is verified.

echo request packets

Special packets sent out by ping and other network utilities to establish connectivity (or the lack of connectivity) between computers.

Encrypting File System (EFS)

EFS is unique to Windows products and is a core technology of Windows. It is used to store files in an encrypted format on an NTFS file system.

encryption

The process of changing data from its native format to a ciphered format that cannot be read by unauthorized users.

Enterprise Admins

A very restrictive group in a Microsoft network that has the authority to add and delete domains and sites and to authorize DHCP servers.

error message

Text output from a computer system that indicates that a problem has occurred.

Ethernet

The most common method of putting data onto wires using the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) method.

Extensible Authentication Protocol (EAP)

A open set of standards that allows addition of new methods of authentication such as smart cards and biometric authentication using fingerprints, eye scans, and so on.

extranet

An extension of the internal network or intranet that allows access for remote clients or partner networks. Usually involves connections over the Internet.