ITPEC IP October 2023 Question 25

Playback starts as soon as some data has been received — streaming plays the video while the rest of it is still arriving.

In streaming, the server sends the video as a continuous flow. The player stores a short stretch in a buffer and plays from it while further data keeps arriving, so the viewer does not wait for the whole file to download. Because the data is played as it arrives, live events can be streamed while they are being shot.

Answer (d)

Why not others:

• •(a) — live streaming distributes events and sports while they are being shot; the data does not have to be stored on the server beforehand
• •(b) — data lost or delayed on the network cannot always be resent in time, so block noise, freezes or a drop in picture quality can still occur
• •(c) — the player must fill its buffer before it starts, so there is a short wait (buffering); it is shorter than a full download, not zero

Key rule: Streaming overlaps transfer and playback through a buffer: the wait shrinks, but it does not disappear, and the network still limits the picture quality.

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