CompTIA A+ Core 1 · 220-1101
Objective 2.1: Compare and contrast TCP and UDP ports, protocols, and their purposes
Practice questions for A+ Core 1 objective 2.1, “Compare and contrast TCP and UDP ports, protocols, and their purposes.” Every question is original, written to the 220-1101 exam objectives, and comes with a full explanation — answer them below to see instant grading.
This objective sits in Domain 2.0: Networking, which is about 20% of the exam — so mastering it moves your readiness score meaningfully.
1.A technician is configuring firewall rules and needs to allow outbound POP3 traffic for email retrieval. Which port must be permitted?
2.An employee is configuring a network monitoring application that needs to receive SNMP trap messages. On which port should the application listen?
3.A network engineer is asked to explain the difference between TCP and UDP for the A+ exam. Which statement correctly describes TCP compared to UDP?
4.Which protocol is responsible for dynamically assigning IP addresses to client devices, and which ports does it use?
5.A security scan identifies port 23 open on a network switch. Why should this be considered a vulnerability?
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