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Collision

(1) A condition that is present when two or more terminals are in contention during simultaneous network access attempts. (2) InA collision occurs when two systems transmit data at the same time onto a connection medium that supports only a single transmission path.


Similar items:
An avoidance method for communications channel contention that depends on two stations detecting the simultaneous start of each other’s transmission, stopping, and waiting a random period of time before beginning again. See also carrier sense, multiple access.
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A multiplestation access scheme for avoiding contention in packet networks in which each station can sense the presence of carrier signals from other stations and thus avoid transmitting a packet that would result in a collision. See also collision detection.
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INFOSec mode of operation wherein each user with direct or indirect access to a system, its peripherals, remote terminals, or remote hosts has all of the following: (1) valid security clearance for the most restricted information processed in the system; (2) formal access approval and signed nondisclosure agreements for that information which a user is to have access; and (3) valid needtoknow for information that a user is to have access. Mode of operation wherein each user with direct or indirect access to a system, its peripherals, remote terminals, or remote hosts has all of the following: (a) valid security clearance for the most restricted information processed in the system; (b) formal access approval and signed nondisclosure agreements for that information which a user is to have access; and (c) valid needtoknow for information which a user is to have access.
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Information system security mode of operation wherein each user, with direct or indirect access to the information system, its peripherals, remote terminals, or remote hosts, has all of the following: a. valid security clearance for all information within an information system; b. formal access approval and signed nondisclosure agreements for all the information stored and/or processed (including all compartments, subcompartments and/or special access programs); and c. valid needto know for some of the information contained within the information system. IS security mode of operation wherein each user, with direct or indirect access to the IS, its peripherals, remote terminals, or remote hosts, has all of the following: (a) valid security clearance for all information within an IS; (b) formal access approval and signed nondisclosure agreements for all the information stored and processed (including all compartments and special access programs); and (c) valid needtoknow for some of the information contained within the IS. See system-high security mode.
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A group of networked systems that could cause a collision if any two (or more) of the systems in that group transmitted simultaneously.
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