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About this tool
Test your knowledge of computer networking fundamentals with interactive multiple-choice questions on protocols, models, devices, and addressing.
The Networking Basics Quiz is a 15-question multiple-choice test on computer networking fundamentals, covering the OSI model, TCP/IP, well-known port numbers, DNS and DHCP, MAC addressing, IPv4 address classes, subnet masks, network topologies and firewalls. Each question has four options, marks your answer right or wrong the moment you pick it, and the run ends with a score out of 15 and a percentage. It suits students revising for a first networking module, candidates warming up for CompTIA Network+ or CCNA study, and anyone about to be asked networking questions in an interview.
Open Networking Basics Quiz on AltFTool — it loads instantly in your browser.
Read the first of 15 questions — What does TCP stand for? — and tap one of the four answers.
The right answer turns green and a wrong one turns red straight away; press Next Question to move on.
After the fifteenth question press See Results for a score out of 15 with the matching percentage, then Try Again to start over.
You see whether you were right before moving on, so a wrong guess is corrected while the question is still in your head.
The 15 questions deliberately span protocols, the OSI model, devices, addressing and security rather than drilling one topic.
The final screen gives your score out of 15 and the equivalent percentage, so you can compare runs as you revise.
15, each with four options and one correct answer. You work through them in order and get a score out of 15 plus a percentage at the end, then you can reset and run it again.
The Network layer, layer 3 — this is where routers make forwarding decisions using IP addresses. The Data Link layer below it deals in MAC addresses within a single network segment, which is the distinction the quiz tests.
HTTP runs on port 80 and HTTPS on port 443; the quiz also covers FTP on 21 and SMTP for sending email. These are the ports most commonly asked for in entry-level networking exams and interviews.
1.0.0.0 to 126.255.255.255. Class B runs from 128.0.0.0 to 191.255.255.255 and Class C from 192.0.0.0 to 223.255.255.255, with 127.x.x.x reserved for loopback — which is why Class A stops at 126.