Beginner Topic 1 of 50 Computer Networks
What is a Network
A set of devices connected to share data and resources.
How it works
A network links nodes (computers, phones, routers) by wired or wireless media so they can exchange data using agreed protocols. Data flows as packets.
Where it is used
The Internet, home Wi-Fi, data-center fabrics.
Common pitfall
Treating networks as reliable: packets get lost, delayed, duplicated and reordered.
Where it fits in the course
What is a Network is topic 1 of 50 in Computer Networks, rated Beginner. It is the first topic in this area. The next topic is Network Topologies.
Practice and explore
- Open the interactive lesson, with a mini quiz.
- Take the Computer Networks quiz.
How to study this topic
- Read the explanation above and restate the definition in your own words.
- Open the interactive lesson and answer its mini quiz.
- Read the common pitfall, then write a short example that avoids it.
- Check your understanding in the Computer Networks quiz, and revisit the topic if you miss a question.
Frequently asked questions
What is What is a Network?
A set of devices connected to share data and resources. It belongs to Computer Networks and is a beginner-level topic.
Where do people use What is a Network?
The Internet, home Wi-Fi, data-center fabrics.
What is the most common mistake with What is a Network?
Treating networks as reliable: packets get lost, delayed, duplicated and reordered.
What should I learn before this topic?
Nothing earlier in Computer Networks is required. This is where the area begins.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Computer Networks quiz.
Is What is a Network hard to learn?
It is a Beginner topic, so it works as an entry point. If the terms are new, read the explanation twice and try the visualizer before the quiz.
How long does it take to learn What is a Network?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to What is a Network?
Network Topologies, LAN, WAN and MAN, OSI Model are closely connected. The full list is in the related topics section of this page.
What should I study after What is a Network?
Continue with Network Topologies, the next topic in Computer Networks.
Related topics
- Network Topologies (Computer Networks)
- LAN, WAN and MAN (Computer Networks)
- OSI Model (Computer Networks)
- TCP/IP Model (Computer Networks)
- What is an Operating System (Operating Systems)
- What is a Database (Databases)
- What is Artificial Intelligence (AI & Machine Learning)