147. AQA A Level SLR22 The TCP-IP stack and MAC addresses
About this video
AQA Specification Reference
A Level 4.9.4.1
In this video we take a closer look at possibly the most important protocol model, then TCP/IP stack. We describe its four layers and the role sockets place in the TCP/IP stack.
Key questions:
- What does protocol layering mean and why is it needed?
- What is the TCP/IP protocol stack?
- What is the difference between a MAC address and an IP address?
00:00 The TCP/IP stack and MAC addresses
00:10 Intro
00:15 The complexity of networking
00:35 The concept of layers
01:12 TCP/IP protocol and the use of layers
01:33 TCP/IP protocol - four or five layers?
02:07 The four layer TCP/IP protocol model
03:20 Application layer
04:22 Transport layer
05:08 Network layer
05:46 Link layer
06:13 MAC addressing
07:28 Why do we need both a MAC address and an IP address?
10:11 TCP/IP protocol and the use of layers continued
12:02 Key questions
12:16 Outro
Last updated: 31.10.25
