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The Fiber Optics Illustrated Dictionary - Part 82 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary only devices in computer networking since most devices employ handshaking to negotiate a transmission. For example a computer printer may seem to be a receive-only device but a printer has to be able to tell the computer when it is ready to receive when it is busy printing and can t receive more data and when it is available again for other jobs or other users on a network. This involves two-way communication. It may even signal the sender about its capabilities and configuration parameters. Most receive-only devices are passive devices or broadcasting devices such as simple PA speakers buzzers lights etc. receiver 1. A device for receiving signals impulses or data transmissions. 2. A device which captures and sometimes converts electromagnetic waves or signals into a form meaningful to humans. Receivers are often combined with tuners to specify the frequency desired and amplifiers to increase the power of the signal. See telephone receiver. Recognized Private Operating Agency RPOA. An ITU-T designation for telephone companies providing internetworking services. Recommended Standard 232 See RS-232 for an entry and accompanying chart of Recommended Standards. RECON reconnaissance. reconnaissance A preliminary or exploratory survey to gain information or data that can potentially be analyzed to yield information it s often difficult to know in advance what data might later be useful or significant . Reconnaissance and surveillance are closely related activities. Reconnaissance is distinguished from surveillance in that surveillance is keeping watch over or observing someone something or some activities or phenomena. Reconnaissance is often used to support surveillance activities. Surveillance may also be used to obtain some of the data collected in reconnaissance activities. Typing a few exploratory passwords into a computer system is a reconnaissance activity intended to see if it would be easy to breach a secure computer system.
