olemus
sõltub kontekstist

näiteid
(1a) andmesides:
http://www.2000trainers.com/cisco-ccna-02/ccna-ethernet-frame-types/
https://en.wikipedia.org/wiki/802.11_Frame_Types

(1b) videos:
https://wiki.multimedia.cx/index.php?title=Frame_Types
http://faraday.ee.emu.edu.tr/ee583/Lectures/EE%20583-Lecture11.pdf

vt ka
- kaader (1)