This Bite Size module explores the range of simple tools and utilities which are available to trace faults, determine end-to-end delay and pinpoint problems in IP networks. We’ll check out ping, tracert, ipconfig/all, netstat, and ARP, with simple examples. Many of the basic tools and utilities used to diagnose faults or locate problems in IP networks are run from the basic ‘command line interface'. This is also often called the DOS prompt, so called because in the early days of computers, the Disk Operating System invented by IBM, and its derivative MS-DOS went unchallenged for several years as the supreme operating system between 1981 and 1995, when the Windows operating system first emerged… Read more

IPv4 may have been replaced by IPv6 in public networks, but it is still in widespread use in private networks, including CCTV. This short course lifts the lid on how IPv4 works, and includes a primer on masking. Read more

Many CCTV systems do not offer high quality pictures because the correct lens has not been specified at the survey stage.  In order to appreciate the role of a lens it is necessary to understand:  Fixed and variable focal lengths Manual and auto-iris lenses ​Depth of field Lens filters Back focusing and the role of a zoom lens Automatic Electronic Shuttering (AES) Varifocal lenses Aspherical lens Zoom lenses IR (Infrared) lenses Megapixel lenses If you would like to learn more about this fascinating subject, at the end of this module we offer you an exclusive 10% discount off our CCTV over IP Networking course.   Read more

WiFi and Mobile networks have long been the standard short range communications infrastructure, but are rapidly running out of capacity; at the same time these networks lack security. Li-Fi is the latest and possibly the most exciting – and definitely the most interesting – alternative, which is explained in this short module. Read more

Lighting, of whatever type is essential to produce CCTV (VSS) images of evidential quality, this bitesize module with audio delivered by one of our expert tutors will look at light & CCTV including the behaviour of light, light meters and the different types of light. Read more

This Bite Size module takes a fascinating look at Local Area NetworksAn obvious question to ask is 'is it a network?'  That of course depends on your own definition of the word 'network' However, if the analogy of a road or rail network is used, you will see that a LAN, for example, is not actually a network at all. A road network provides alternative routes between geographic points, which are instantly available to a traveller. The same goes for the rail network. Read more