In CSMA/CA, why do you need a contention window, even after DIFS? What is the typical size of the contention window?
What will be an ideal response?
The purpose of the contention window is to reduce or avoid the collisions. The
typical size of the contention window is 32, 64, 128, 256, ….
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Semiconductors are primarily used in:
A) Pneumatic controls. B) Electronic controls. C) Mechanical control linkages. D) Electromechanical controls.
When joining steel pipe, the following should be applied to the threads before connecting.
A. pipe dope B. flux C. Teflon tape D. a and c
Which of the following best describes continuity monitoring?
a. Initiates an alarm when the current in the heat-tracing circuit is too low or too high b. Measures the temperature of the pipe with a digital controller connected to an RTD c. Monitors the current leakage from the system heating cable, power wiring, and components to ground d. Verifies that voltage is present at the end termination of a heat-tracing cable run
Which of the following is NOT part of a saber saw?
a. motor housing c. toe b. switch lock d. blade retention screw