Q1. Which port number is used by DNS?
- A.53✓ Correct
- B.80
- C.443
- D.22
Explanation: DNS uses port 53 for domain name resolution. Learn more.
CompTIA PenTest+ Practice Questions: Networking
24 free, exam-style CompTIA PenTest+ (PT0-003) practice questions covering Networking. Each question shows the correct answer and a clear explanation. Ready for the real thing? Take the full timed quiz below.
Q2. What does DHCP stand for?
- A.Dynamic Host Configuration Protocol✓ Correct
- B.Domain Host Control Protocol
- C.Data Handling Configuration Process
- D.Digital Hardware Configuration Panel
Explanation: DHCP automatically assigns IP addresses to devices. Learn more.
Q3. Which tool is used to terminate network cables?
- A.Crimper
- B.Punch-down tool✓ Correct
- C.Toner probe
- D.Multimeter
Explanation: Punch-down tools secure wires in keystone jacks. Learn more.
Q4. Which protocol is used for email retrieval?
- A.SMTP
- B.IMAP✓ Correct
- C.HTTP
- D.FTP
Explanation: IMAP allows users to access emails from a server. Learn more.
Q5. What does PoE (Power over Ethernet) provide?
- A.Faster internet speeds
- B.Power to network devices✓ Correct
- C.Firewall protection
- D.Wireless encryption
Explanation: PoE delivers data and power via Ethernet. Learn more.
Q6. What does the 'ping' command test?
- A.Network bandwidth
- B.Latency and connectivity✓ Correct
- C.DNS resolution
- D.Firewall rules
Explanation: Ping sends ICMP echo requests. Learn more.
Q7. What is the default subnet mask for 10.0.0.1?
- A.255.0.0.0✓ Correct
- B.255.255.0.0
- C.255.255.255.0
- D.255.255.255.128
Explanation: Class A IPs use 255.0.0.0 by default. Learn more.
Q8. What is the purpose of a VLAN?
- A.Increase bandwidth
- B.Segment network traffic✓ Correct
- C.Boost Wi-Fi signals
- D.Encrypt data
Explanation: VLANs isolate broadcast domains. Learn more.
Q9. What is the maximum speed of Wi-Fi 6 (802.11ax)?
- A.1.3 Gbps
- B.3.5 Gbps
- C.9.6 Gbps✓ Correct
- D.10 Gbps
Explanation: Wi-Fi 6 supports up to 9.6 Gbps. Learn more.
Q10. Which tool measures Wi-Fi signal strength?
- A.Multimeter
- B.Cable tester
- C.Wi-Fi analyzer✓ Correct
- D.OTDR
Explanation: Wi-Fi analyzers detect signal levels. Learn more.
Q11. What does 'ipconfig /flushdns' accomplish?
- A.Clear DNS resolver cache✓ Correct
- B.Renew DHCP lease
- C.Reset TCP/IP stack
- D.Flush ARP cache
Explanation: Resolves DNS issues by clearing cache. Learn more.
Q12. What is the maximum theoretical speed of Wi-Fi 6 (802.11ax)?
- A.1.3 Gbps
- B.3.5 Gbps
- C.9.6 Gbps✓ Correct
- D.10 Gbps
Explanation: Wi-Fi 6 supports up to 9.6 Gbps with MU-MIMO/OFDMA. Learn more.
Q13. Which tool measures Wi-Fi signal strength?
- A.Multimeter
- B.Cable tester
- C.Wi-Fi analyzer✓ Correct
- D.OTDR
Explanation: Wi-Fi analyzers detect signal dBm levels and channel congestion. Learn more.
Q14. What does 'ipconfig /flushdns' accomplish?
- A.Clear DNS resolver cache✓ Correct
- B.Renew DHCP lease
- C.Reset TCP/IP stack
- D.Flush ARP cache
Explanation: Resolves DNS issues by clearing cached entries. Learn more.
Q15. What is the purpose of a VLAN?
- A.Increase bandwidth
- B.Segment network traffic✓ Correct
- C.Boost Wi-Fi signals
- D.Encrypt data
Explanation: Virtual LANs isolate broadcast domains logically. Learn more.
Q16. What is the default subnet mask for 192.168.1.100?
- A.255.0.0.0
- B.255.255.0.0
- C.255.255.255.0✓ Correct
- D.255.255.255.128
Explanation: Class C private IPs use 255.255.255.0 (/24) by default. Learn more.
Q17. Which protocol uses port 3389?
- A.RDP✓ Correct
- B.SSH
- C.VNC
- D.Telnet
Explanation: Remote Desktop Protocol enables Windows remote access. Learn more.
Q18. What does the 'ping' command test?
- A.Network bandwidth
- B.Latency and connectivity✓ Correct
- C.DNS resolution
- D.Firewall rules
Explanation: Ping sends ICMP echo requests to check reachability. Learn more.
Q19. What is the purpose of an MX record in DNS?
- A.Define mail servers✓ Correct
- B.Map domain to IP
- C.Create subdomains
- D.Enable IPv6
Explanation: MX (Mail Exchange) records direct email delivery. Learn more.
Q20. What does the 'netstat -a' command display?
- A.Active connections
- B.Listening ports
- C.Routing table
- D.All sockets✓ Correct
Explanation: -a shows both listening and established connections. Learn more.
Q21. Which protocol dynamically assigns IP addresses?
- A.DNS
- B.DHCP✓ Correct
- C.SNMP
- D.ARP
Explanation: Dynamic Host Configuration Protocol automates IP assignment. Learn more.
Q22. Which port does SNMP use?
- A.161✓ Correct
- B.443
- C.22
- D.3389
Explanation: Simple Network Management Protocol monitors devices via UDP 161. Learn more.
Q23. What does PoE provide to devices?
- A.Power over Ethernet✓ Correct
- B.Packet optimization
- C.Port forwarding
- D.Proxy services
Explanation: Power over Ethernet (PoE) delivers data + power to devices like IP cameras. Learn more.
Q24. What is the purpose of a MAC address?
- A.Identify network devices✓ Correct
- B.Route internet traffic
- C.Encrypt data
- D.Assign IP addresses
Explanation: Media Access Control address uniquely identifies NICs. Learn more.