Explanation

The MAC (Media Access Control) sub-layer is part of the Data Link Layer (Layer 2) of the OSI model.

It handles how devices access and control the transmission on the physical medium, such as Ethernet.

Explanation

Vulnerability means کمزوری

Weakness means کمزوری

Explanation

25% of 20,000 = (25/100) × 20,000 = Rs. 5,000.

Explanation

Work is done when a force causes displacement of an object in the direction of the force.

A man pushing against the wall, although force is applied, the wall does not move, so no displacement occurs → no work is done.

Explanation

Acceleration is related to force, mass, and change in velocity (from Newton’s 2nd Law).

It has no relation with temperature, which is a thermal property.

Explanation

Bridges are used to connect similar LANs that use the same network protocols.

They help manage traffic and reduce collisions by dividing networks into segments.

Explanation

The time period of a simple pendulum is independent of its mass.

It depends on length and acceleration due to gravity:

T = 2π√L/g

Explanation

If two lines are parallel, the difference of their slopes is zero.

This is because parallel lines have the same slope. 

Explanation

120° = 120 × π/180 = 2π/3.