taekwondo1-8, Exercise 1: Hall and uniform

Model answer:

Dobok origin: the Dobok article says it came from the Japanese keikogi/dogi used in judo and similar arts. Korean variants: pants and sleeves wider and longer than the keikogi, and doboks are often modelled on the hanbok.
Jackets: WTF-style usually v-neck, tailored after the hanbok; traditional taekwondo may be identical or very similar to the keikogi with a cross-over front; ITF-style typically a newer design with a vertically closing front.

Dojang article: the Korean dojang is listed among similar establishments and "fairly similar to the Japanese variety"; the word is the Korean reading of the characters for dojo ("place of the Way"), a term that originates in Buddhism.
What it does not tell you: any description of taekwondo etiquette or layout; the detailed customs in the article (no shoes, ritual cleaning, the shomen wall and shrine) are described for Japanese halls and should not be assumed for taekwondo.

Sources: Wikipedia, Dobok; Dojang; Taekwondo.