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Network Topologies – Protocols and Layers

The first video examines the topology of modern networks – how the computers are arranged and connected together.  The history of network topologies is outlined briefly, before considering star networks in more detail.  The need for, and the advantages of a central switch, together with the concept of mesh and...

Wired and Wireless Networks

The first video explores the two main types of networks: local area networks (LAN) and wide area networks (WAN).  The reasons for networking stand-alone computers are outlined, and the potential disadvantages too.  The connection options for devices on a network are briefly mentioned and covered in more detail in...

Storage

The first video explains why a computer needs secondary storage, and explains what is meant by primary and tertiary storage.

The second video explains what is meant by the term “capacity” of storage devices.  The relative size of different types of files is introduced.  (More detailed explanations of this...

Systems Architecture

The first video explores the first computers that had stored programs in the same memory space as the data required for them.  This is known as the von Neumann architecture and is still the foundation principle on which most computers are still built today.  We take the lid off a central processing unit and explain...

Memory

The first video explores the purpose of both RAM and ROM in a typical computer system.  The differences between the two memory types are outlined.

The second video considers what happens when a modern multi-tasking operating system runs out of physical RAM.  Does it output a “memory full” message and refuse...

Dodging Bullets

The International Space Station (ISS) is under constant threat from objects moving at speeds not often seen here on Earth. Space junk and micrometeoroids travel many kilometers each second, testing the impact shielding that protects the astronaut inhabitants. This Astro-Pi resource for secondary schools touches on...

Which Way Is Up?

For teachers of secondary school science, this Astro-Pi physics resource looks at gravity, microgravity and weightlessness. Students learn the fundamentals of gravitational force and potential energy, and apply these ideas to projectiles and orbiting bodies - particularly the International Space Station (ISS)....

Fly by the Stars

Satellites and other spacecraft use star cameras to image space and to determine which direction they are pointing.

This resource, suitable for upper secondary school students, looks in detail at the night sky, examining objects and orbital motion within the solar system. Constellations and the stories...

Magnetic Earth

This AstroPi resource helps secondary school students investigate the magnetic field of the Earth. The series of activities develops from basic principles of magnetism through to some understanding of the nature and cause of the Earth's magnetism.

The guide links to several other eLibrary resources and a...

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