Any network that can connect to yours, with which you have neither a trusted or semi-trusted relationship. For example, a company's employees would typically be trusted on your network, a primary [..]

A text file passed from the Web server to the Web client (a user's browser) that is used to identify a user and could record personal information such as ID and password, mailing address, credit [..]

A basic networking configuration in which all nodes are connected in a circle with no terminated ends on the cable.

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(Access Control List

An LED (light-emitting diode) that shines when a piece of hardware is working, communicating with the network, and transmitting data.

A method by which switches and routers determine the unique address number for each device on a network, enabling accurate transmission to and from each node.

An intrusion technique in which a hacker sequentially scans IP addresses, generally as the information-gathering prelude to an attack. These probes are usually attempts to map IP address space as the [..]

A computer program that reports information to another computer or allows another computer access to the local system. Agents can be used for good or evil. Many security programs have agent components [..]

(authentication header