Expand the acronym CSMA/CD, and explain each part.
What will be an ideal response?
The acronym CSMA/CD stands for Carrier Sense Multi-Access with Collision Detection, which
means the following:
? Carrier Sense: Instead of allowing a station to transmit whenever a packet becomes ready,
Ethernet requires each station to monitor the cable to detect whether another transmission is
already in progress.
? Multiple Access: The system allows multiple users/hosts to make use of a common/shared
media
? Collision Detection. A collision can occur if two stations wait for a transmission to stop, find the
cable idle, and both start transmitting.
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A. OCR B. digital C. 3-D D. imaging
The primary appeal of a role-based access control model is that ________.
a) it allows users to belong to multiple roles b) it assigns relationships between subjects and objects that are not limited to classes such as owners and groups c) administrators only need to define specifics roles and assign users to those roles rather than defining specific privileges for each user d) none of the above