Week 10 · Network foundations

IP addressing, subnets, DHCP and DNS

In week 6 you found your IP address. Today you find out what the numbers mean, who gave them to you, and how typing google.com becomes a number your computer can send packets to.

Networking and security90 minutesIntermediateLevel 1 module

In this lesson you will

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Read an IPv4 address and subnet mask and find the network address
Decide whether two devices are on the same network
Explain how DHCP gives a device its address (DORA)
Explain how DNS turns a name into an IP address and test it with nslookup
Trace the route to a server with tracert/traceroute

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The full lesson is for enrolled students

Enrolled students get the complete notes: essential theory, key terms, a step-by-step practical walkthrough, an independent challenge, check-your-understanding questions and the take-home task.

IP addressing, subnets, DHCP and DNS

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