Key Ideas: ISPs, Bandwidth, Internet Protocol, Subnetting and VPNs

Topic: Y2-3 Connecting a system to the Internet

How a network gets onto the internet and stays safe, explained step by step from Year 1 to Year 3: ISPs, bandwidth, IP addresses, TCP/IP, DNS, subnetting, VPNs, DHCP, firewalls, encryption and authentication.

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