(ISC)2 Certified in Cybersecurity Practice Exam

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Prepare for the (ISC)2 Certified in Cybersecurity Exam with comprehensive quizzes and extensive question banks. Enhance your skills with detailed explanations and practice tests designed to improve your expertise for the certification exam. Get exam-ready now!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is port 53 used for?

DNS
FTPS
HTTP
RDP

The correct answer is: DNS

Port 53 is used for the Domain Name System (DNS), which is crucial for resolving human-friendly domain names (like www.example.com) into machine-readable IP addresses (like 192.0.2.1). When a user types a URL into their web browser, their request is sent to a DNS server, which queries the DNS records and returns the corresponding IP address. This process is essential for enabling internet communication and navigation. The other choices refer to different services. FTPS, for instance, uses port 21 for file transfer protocols, HTTP operates primarily over port 80 for web traffic, and RDP, which is used for remote desktop protocol, generally communicates over port 3389. Each of these services has specific ports designated for their respective functions, highlighting the unique role that port 53 plays specifically for DNS.