Explanation

A switch operates at the Data Link Layer (Layer 2) of the OSI model.

It uses MAC addresses to forward data frames within a local network.

Explanation

1. Simplex: Data flows in one direction only (e.g., keyboard to computer).
2. Half-Duplex: Data can flow both ways, but not at the same time (e.g., walkie-talkies).
3. Full-Duplex: Data flows both ways simultaneously (e.g., telephone conversations).

Explanation

Mode is the value that occurs most frequently in a dataset.

It represents the most common or popular item in the data.

Explanation

"Because" shows the reason birds can fly easily — they have wings.

It correctly connects the cause and effect in the sentence.

Explanation

The people of Balochistan joined Pakistan through the decision of the Municipal Committee and the Shahi Jirga, which were both involved in the political process.

Balochistan got the status of a province: on 1 July 1970.

Balochistan was given the status of a province during the era of Yahya Khan.

Explanation

Temperature increases kinetic energy, speeding up diffusion.

Intermolecular forces affect how easily gas particles move past each other.

Molecular mass affects rate inversely — lighter gases diffuse faster (Graham's Law).

Explanation

- f tan xdx = ln[cos x] + C.

This is a standard result from integral calculus involving trigonometric functions.

Explanation

A small standard deviation means the data is tightly clustered around the mean.

This results in a less spread out (narrower) normal distribution curve.

Explanation

غزوہ تبوک، رسول خداؐ کے غزوات میں سے آخری غزوہ ہے۔

غزوہ تبوک میں رسول اللہ ﷺ نے اسلامی لشکر کا جھنڈا حضرت ابوبکر صدیق رضی اللہ عنہ کے سپرد فرمایا۔

اس غزوہ میں آپؓ نے قیادت میں اہم کردار ادا کیا اور مالی قربانی میں بھی سب سے آگے رہے۔

Explanation

A critical point occurs where the derivative of a function is zero or does not exist.

These points are important for finding local maxima, minima, or points of inflection.