058. OCR A Level (H046-H446) SLR11 – 1.3 TCP IP, DNS & protocol layers

About this video

OCR Specification Reference
AS Level 1.3.2b
A Level 1.3.3b

In this video we discuss a number of fundamental concepts which allow The Internet to operate, these include: TCP/IP stack, DNS and Protocol layers.

Key questions:

- How does the internet work?
- What does protocol layering mean and why is it needed?
- What is the difference between a MAC address and an IP address?
- How does the Domain Name System work?

00:00 TCP/IP, DNS and protocol layering
00:12 Intro
00:17 The internet
01:08 The complexity of networking
01:31 The concept of layers
02:28 TCP/IP protocol and the use of layers
02:54 TCP/IP protocol- four or five layers?
03:40 The four layer TCP/IP protocol model
05:06 Application layer
05:57 Transport layer
06:56 Network layer
07:38 Link layer
08:13 Why do we need both a MAC address and an IP address?
11:04 TCP/IP protocol and the use of layers
12:57 The World Wide Web and Domain Name System (DNS)
13:39 Domain Name System
15:51 Key questions
16:09 Outro

Last updated: 22.05.26

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