Unit 1.5 - Network Topologies, protocols and layers Lesson 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.

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

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.

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.

Key Words IP Addressing MAC Addressing Protocols

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.

An example IP address 192.168.1.23

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.

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.

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

IP Darts

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’

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.

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?

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

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)

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

Explanation Videos An Overview: https://www.youtube.com/watch?v=WmymBI-X7Tc IP https://www.youtube.com/watch?v=zyL1Fud1Z1c IMAP vs POP3: https://www.youtube.com/watch?v=BK4ng6Gcits

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

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)

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

Plenary BBC Online test: http://www.bbc.co.uk/education/guides/zp9jpv4/test

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