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Fiber optics |
A technology that uses glass (or plastic) threads
(fibers) to transmit data. A fiber optic cable consists of a bundle of glass
threads, each of which is capable of transmitting messages modulated onto
light waves.
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Firewall | A system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria. |