Core 1: Networking
35 free practice questions with explanations
PassNova has 35 free CompTIA A+ practice questions on Core 1: Networking, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.
Core 1: Networking: example questions & answers
Here are 6 example questions from this topic. Practise the full set of 35 free in the browser.
-
Which port does HTTPS use?
- A 80
- B 443 ✓
- C 21
- D 25
Answer: HTTPS uses TCP port 443 for encrypted web traffic. Port 80 is unencrypted HTTP.
-
Which port does HTTP use?
- A 443
- B 80 ✓
- C 8080
- D 53
Answer: HTTP uses TCP port 80 for standard, unencrypted web traffic.
-
Which port does DNS primarily use for name resolution queries?
- A 53 ✓
- B 67
- C 80
- D 110
Answer: DNS uses port 53 (UDP for queries, TCP for zone transfers).
-
Which ports does DHCP use?
- A 53 and 80
- B 67 and 68 ✓
- C 20 and 21
- D 143 and 993
Answer: DHCP uses UDP port 67 (server) and 68 (client) to assign IP configuration.
-
Which port does RDP use for remote desktop connections?
- A 22
- B 23
- C 3389 ✓
- D 443
Answer: Remote Desktop Protocol uses TCP port 3389.
-
Which port does SSH use for secure remote access?
- A 22 ✓
- B 23
- C 21
- D 3389
Answer: SSH uses TCP port 22 to provide encrypted remote command-line access.