1. Networking : Subnets COMP3

2. IP Addressing Within a Network Each node within a network must be uniquely identified Identification makes use of an IP address Within networks, an IP may be dynamic or static. Task 1: Write down the advantages and disadvantages of dynamically assigning an IP address.

3. You Are Here

4. Understanding IP Addressing Computers work with binary – hence the use of numbers for quick translation. For non-technical humans, this is not so easy. Task 2: Open an internet browser and navigate to: http://cisco.comhttp://cisco.com Open a second browser and navigate to: http://72.163.4.161http://72.163.4.161 What was the result?

5. DNS DNS stands for : Domain Name Server This is the text version of the IP address which is assigned to the particular web server to which you want to connect to. Task 3: using your own machines run a cmd window. Run a ping command to a website of your choosing.

6. Understanding IP Addressing IP addresses are built as a hierarchy They can be understood much like a combining a house number with a UK Postcode TownArea House

7. Understanding IP Addressing IP addresses are built as a hierarchy They can be understood much like a combining a house number with a UK Postcode Network (aka. Subnet) Host (aka. Node)

8. A Net Mask Networks are set up in ‘Bands’ which range from small to large businesses. The smaller the network, the larger the number of nodes that may be assigned. How many possible nodes could this network hold? Network (aka. Subnet) Host (aka. Node)

9. Historical Subnets Class A - values 0 through 127 Class B - values 128 through 191 Class C - values 192 through 223 Class D - (multicast) - values 224 through 239 Class E - (experimental) - values 240 through 255 Task 4 : What class of network is this?

10. Current Subnets Current subnets include an additional byte signifying how many bits the subnet includes. These addresses are formed in this way: Task 5 : Write down the subnet for this IP address

11. Final task Assign an appropriate IP to each of the nodes in these two offices: Network: 192.168.1.0/24 Network: 192.168.2.0/24

12. Homework Complete questions 1 – 3 on page 181 of text book. Create a network diagram using photos of the individual pieces of hardware. DUE 26 th September!!!