7. Videos

A quick overview of network types by size.

Watch and think:

• Which network type covers a whole city?
• Name one reason a LAN is faster than a WAN.

Open on YouTube ↗

Explains who can reach each kind of network.

Watch and think:

• Give an example of an extranet a company might use.
• Why would an intranet not be visible from the internet?

Open on YouTube ↗

Shows what a thin client is and where it fits best (useful for A.D1).

Watch and think:

• What happens to thin-client users if the server goes down?
• Name one organisation that would suit thin clients, and why.

Open on YouTube ↗

A cloud provider’s own short explanation of cloud computing.

Watch and think:

• What does “pay for what you use” mean for a small business?

Open on YouTube ↗

Covers cloud types and service models (IaaS, PaaS, SaaS).

Watch and think:

• Which service model gives the customer the most control?
• Give one risk of moving to the public cloud.

Open on YouTube ↗

Explains how SDN controls a network centrally with software.

Watch and think:

• What is the difference between the control plane and the data plane?

Open on YouTube ↗

How SANs give servers fast, shared storage.

Watch and think:

• Why keep storage traffic on its own network?

Open on YouTube ↗

Cisco’s one-minute film of a day where connected devices trigger each other: a starter for IoT and its risks.

Watch and think:

• List three connected devices in the film.
• What could go wrong if one of them was hacked?

Open on YouTube ↗

A classic animation that follows packets through routers, switches, firewalls and the internet: perfect for OSI, TCP/IP and encapsulation.

Watch and think:

• What job does the router do in the film?
• What happens to a packet that is lost on the way?
• Which OSI layers can you spot?

Open on YouTube ↗

A real, fully automated port where every crane, vehicle and gate depends on the network. VectorUSA and Cisco designed and built it.

Watch and think:

• Which design aims (availability, redundancy, security, scalability) matter most here, and why?
• What would happen to the port if the network failed?

Open on YouTube ↗

Read the VectorUSA and Cisco case study ↗

A dramatised ransomware attack showing why passwords, patching, access rights and monitoring matter.

Watch and think:

• How did the attacker get in?
• Which part of your access plan (passwords, groups, audit logs) would have stopped them sooner?

Open on YouTube ↗