34. OCR GCSE (J277) 1.3 The concept of layers
About this video
OCR J277 Specification Reference - Section 1.3
Networking is a complex process with many devices, services and protocols. The concept of layers is to break the problem down into smaller sub-problems so that devices and protocols can focus on achieving just one aspect of networking. For example, IP routes packets but does not check them for errors, that is the role of TCP. This video explores the concept of layering protocols.
Don't forget, whenever the blue note icon appears in the corner of the screen, that is your cue to take notes about the content being shown on the current slide.
00:00 The concept of layers
00:06 Intro
00:11 The complexity of networking
01:20 The concept of layers
03:13 Going beyond the GCSE specification
03:33 TCP/IP protocol and use of layers
05:00 Application layer
06:06 Transport layer
07:31 Network layer
08:16 Link layer
09:37 Outro
Last updated: 02.03.26
