Cisco Systems

From A3 to ZZZ this guide lists 1,500 text message and online chat abbreviations to help you translate and understand today's texting lingo. Read More »

Port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of port numbers  are specified in... Read More »

Computer architecture provides an introduction to system design basics for most computer science students. Read More »

Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »

Learn about each of the five generations of computers and major technology developments that have led to the computing devices that we use... Read More »