Sample CompTIA Network+ N10-009 Practice Questions
Q: Which layer of the OSI model is responsible for logical addressing and routing?
A: Network. The Network layer (Layer 3) handles logical addressing using IP addresses and determines the best path for data routing between networks.
Q: Which dynamic routing protocol is considered an interior gateway protocol using distance-vector methodology?
A: RIP. RIP (Routing Information Protocol) is a distance-vector IGP that uses hop count as its metric. It is simple to configure but limited to a maximum of 15 hops.
Q: Which protocol uses traps and polling to monitor network devices?
A: SNMP. SNMP (Simple Network Management Protocol) uses polling (GET/SET) and traps (unsolicited alerts from agents) to monitor and manage network devices.
Q: What are the three components of the CIA triad?
A: Confidentiality, Integrity, Availability. The CIA triad (Confidentiality, Integrity, and Availability) forms the foundation of information security, guiding security policies and controls.
Q: What is the first step in the network troubleshooting methodology?
A: Identify the problem. The CompTIA troubleshooting methodology starts with identifying the problem by gathering information, questioning users, and identifying symptoms and recent changes.
Q: At which OSI layer does a switch primarily operate?
A: Data Link. Switches operate at the Data Link layer (Layer 2) using MAC addresses to forward frames to the correct port. Some managed switches also support Layer 3 functions.
Q: Which protocol operates at the Transport layer and provides reliable, connection-oriented communication?
A: TCP. TCP (Transmission Control Protocol) operates at Layer 4 and uses a three-way handshake, sequencing, and acknowledgments to ensure reliable delivery.
Q: A network administrator notices data is being encapsulated with a header containing source and destination MAC addresses. At which OSI layer is this occurring?
A: Data Link. MAC addresses are added at the Data Link layer (Layer 2) during frame encapsulation. The Network layer uses IP addresses, and the Transport layer uses port numbers.
Q: Which well-known port does HTTPS use by default?
A: 443. HTTPS uses port 443 by default for encrypted web traffic. Port 80 is used by unencrypted HTTP. Ports 8080 and 8443 are common alternative ports.
Q: Which port does SSH use by default?
A: 22. SSH (Secure Shell) uses TCP port 22 for encrypted remote administration. Port 21 is FTP, port 23 is Telnet, and port 25 is SMTP.