N10-009

Practice N10-009 Exam

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The dumps for N10-009 exam was last updated on Oct 30,2025 .

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Question#1

A user is unable to navigate to a website because the provided URL is not resolving to the correct IP address. Other users are able to navigate to the intended website without issue.
Which of the following is most likely causing this issue?

A. Hosts file

B. Self-signed certificate

C. Nameserver record

D. IP helper ANS

Explanation:
Role of the Hosts File:
The hosts file is a local file on a computer that maps hostnames to IP addresses. It can be used to override DNS resolution by providing a static mapping of a hostname to an IP address.
Common Issues with the Hosts File:
If an incorrect IP address is mapped to a hostname in the hosts file, it can cause the computer to resolve the hostname to the wrong IP address. This can lead to navigation issues for specific websites while other users, relying on DNS, do not face the same problem.
Why Other Options are Less Likely:
Self-signed certificate: Relates to SSL/TLS and would cause a security warning, not a navigation failure.
Nameserver record: Affects all users, not just one.
IP helper: Used to forward DHCP requests and is unrelated to DNS resolution issues.
Troubleshooting Steps:
Check the hosts file on the affected user's computer (C:\Windows\System32\drivers\etc\hosts on Windows or /etc/hosts on Unix/Linux).
Look for entries that map the problematic hostname to an incorrect IP address and correct or remove them.
Reference: CompTIA Network+ study materials and system administration documentation.

Question#2

Which of the following attacks utilizes a network packet that contains multiple network tags?

A. MAC flooding

B. VLAN hopping

C. DNS spoofing

D. ARP poisoning

Explanation:
VLAN hopping is an attack where an attacker crafts packets with multiple VLAN tags, allowing them to traverse VLAN boundaries improperly. This can result in gaining unauthorized access to network segments that are supposed to be isolated. The other options do not involve the use of multiple network tags. MAC flooding aims to overwhelm a switch’s MAC address table, DNS spoofing involves forging DNS responses, and ARP poisoning involves sending fake ARP messages.
Reference: According to the CompTIA Network+ course materials, VLAN hopping exploits the tagging mechanism in network packets to gain unauthorized access.

Question#3

A technician is planning an equipment installation into a rack in a data center that practices hot aisle/cold aisle ventilation.
Which of the following directions should the equipment exhaust face when installed in the rack?

A. Sides

B. Top

C. Front

D. Rear

Explanation:
In a data center that practices hot aisle/cold aisle ventilation, equipment should be installed so that the exhaust faces the rear of the rack. This setup ensures that hot air is expelled into the hot aisle, maintaining proper airflow and cooling efficiency.
Hot Aisle/Cold Aisle Configuration: Equipment intake should face the cold aisle where cool air is supplied, and exhaust should face the hot aisle where hot air is expelled.
Cooling Efficiency: Proper orientation of equipment helps maintain an efficient cooling environment by segregating hot and cold air, preventing overheating and improving energy efficiency. Network
Reference: CompTIA Network+ N10-007 Official Certification Guide: Discusses data center design principles, including hot aisle/cold aisle configurations.
Cisco Data Center Design Guide: Provides best practices for data center layout and equipment installation.
Network+ Certification All-in-One Exam Guide: Covers data center environmental controls and ventilation strategies.

Question#4

A network administrator is configuring access points for installation in a dense environment where coverage is often overlapping.
Which of the following channel widths should the administrator choose to help minimize interference in the 2.4GHz spectrum?

A. 11MHz

B. 20MHz

C. 40MHz

D. 80MHz

E. 160MHz

Explanation:
Reference: CompTIA Network+ Certification Exam Objectives - Wireless Networks section.

Question#5

A network administrator needs to add 255 useable IP addresses to the network. A /24 is currently in use.
Which of the following prefixes would fulfill this need?

A. /23

B. /25

C. /29

D. /32

Explanation:
A /23 subnet provides 512 total addresses, of which 510 are usable (subtracting 2 for network and broadcast addresses). This would satisfy the need for 255 additional addresses.

Exam Code: N10-009 Q & A: 332 Q&As Updated: Oct 30,2025

Full N10-009 Exam Dumps Here

Exam Code: N10-009
Q & A: 332 Q&As
Updated: Oct 30,2025

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