Match List I with List II.

List I

i.Simplex

ii.Serial

iii.Full-duplex

iv.Parallel

List II

a.Multiple bits transmitted over several channels at the same time

b.Data transmission in one direction only

c.Data is sent one bit at a time over a single channel

d.Data transmission in two directions at the same time

Ai-b, ii-a, iii-d, iv-c

Bi-b, ii-c, iii-d, iv-a ✓ Correct

Ci-c, ii-b, iii-a, iv-d

Di-c, ii-b, iii-d, iv-a

Correct answer: (B) i-b, ii-c, iii-d, iv-a

Explanation

The four terms describe the direction and manner in which data is transmitted between devices.

Simplex pairs with data transmission in one direction only, like a signal that never flows back.

Serial pairs with sending data one bit at a time over a single channel, one after another.

Full-duplex pairs with data transmission in two directions at the same time, like a telephone call.

Parallel pairs with multiple bits transmitted over several channels at the same time.

Serial links suit long distances while parallel links move more bits at once over short distances.

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