1. Unit 1.5 - Network Topologies, protocols and layers Lesson 2

2. Big Picture
In the previous lesson students were introduced to types of Networks.
This lesson students will learn how IP addressing, MAC addressing and Protocols support the access and to Network.

3. Learning Objectives
Understand what the main IP Addressing, MAC Addressing and protocols are
Be able to recall a range of protocol acronyms
Explain what some of the protocols do

4. What is a Network?
A computer network is a number of computers linked together to allow them to share resources. Networked computers can share hardware, software and data.
Remember also that connected devices could be printers, tablets, laptops or a webcam.

5. Engagement Activity
(1 mins) Think of all of the words that are related to networks
(1 mins) Share and copy down other words from other students in the class
(3 mins) select 5 words and write a simple definition down
(3 mins) use the internet to find definitions of 3 of the words you do not know.

6. Key Words
IP Addressing
MAC Addressing
Protocols

7. IP Address
A unique string of numbers separated by full stops that identifies each computer using the Internet Protocol to communicate over a network.
They are similar to as a postcode that is used to identify a house in a county on a street.

8. An example IP address

9. Activity 1 - IP addresses
Use the website “What is my IP address” to find your IP address
It my be the same as another students. why?
What class is the IP address.

10. IP Address Data travelling on a Network are sent as packets
Each device on the internet has a unique IP address which is sent with the packets to identify which computer to send the data to.
The address is broken down into four numbers which can represent a number between 0 and 255 separated by a full stop.

11. IP Classes
IP addresses also have different classes which identify the class of Network that the user is on.
This indicates the number of total possible users and the purpose of the network

12. IP Darts

13. MAC address
MAC addresses, or Media Access Control Addresses, uniquely identify a device on a network by identifying the network adapter that the device is using.
This enables you to distinguish between different devices.
Try this!
On a windows computer you can locate your MAC address:
Go to the start menu
Type cmd
Type ipconfig/ all
The MAC address is listed as ‘Physical Address’

14. MAC address
The MAC address is embedded into the device when it is manufactured and the owner cannot change it.
A MAC address is a unique code which is built into the Network Interface Card (NIC)
Each address is individual and is made up of 48 bits, usually written in hexadecimal for ease.

15. An Example MAC address AA-34-G4-44-23-F1
It uses hexadecimal as a number base
Question?!
Why would it use Hexadecimal over Binary?

16. Protocols
Network protocols are a set of rules or conventions which control the communication between devices on a network
A set of rules for communication

17. Key Protocols TCP/IP (Transmission Control Protocol/Internet Protocol)
HTTP (Hyper Text Transfer Protocol)
HTTPS (Hyper Text Transfer Protocol Secure)
FTP (File Transfer Protocol)
POP (Post Office Protocol)
IMAP (Internet Message Access Protocol)
SMTP (Simple Mail Transfer Protocol)

18. Activity 2 Briefly research the purpose of each Protocol
Choose one of the protocols and create a poster which explains to the reader what the protocol is, its features. Include a diagram and examples
Share these posters with other students

19. Explanation Videos An Overview: IP
IMAP vs POP3:

20. Do you know your Protocols?
TCP/IP
HTTP
HTTPS
FTP
POP
IMAP
SMTP

21. Do you know your Protocols? - Answers
TCP/IP (Transmission Control Protocol/Internet Protocol)
HTTP (Hyper Text Transfer Protocol)
HTTPS (Hyper Text Transfer Protocol Secure)
FTP (File Transfer Protocol)
POP (Post Office Protocol)
IMAP (Internet Message Access Protocol)
SMTP (Simple Mail Transfer Protocol)

22. Activity 3 Complete the table you are given
You have 10 minutes to complete it
You may use notes to help you
Ask for help from others if you are totally stuck
Compare your answers with others around you and add post-it notes for corrections

23. Plenary
BBC Online test:

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