Practice Free N10-009 Exam Online Questions
Question #1
A network administrator needs to implement a solution to filter access to the internet.
Which of the following should the administrator most likely implement?
- A . Router
- B . Cloud gateway
- C . Proxy
- D . Intrusion detection system
Correct Answer: C
C
Explanation:
A proxy server can filter internet access by controlling which websites or services users can reach. It enforces content policies and can provide caching and monitoring.
C
Explanation:
A proxy server can filter internet access by controlling which websites or services users can reach. It enforces content policies and can provide caching and monitoring.
Question #2
Which of the following network cables involves bounding light off of protective cladding?
- A . Twinaxial
- B . Coaxial
- C . Single-mode
- D . Multimode
Correct Answer: D
D
Explanation:
Multimode fiber optic cables involve the transmission of light signals that bounce off the core’s cladding as they travel down the fiber. This characteristic differentiates it from single-mode fiber, where the light travels directly down the fiber without reflecting off the cladding.
Here are some detailed points about multimode fiber cables:
Construction: Multimode fibers have a larger core diameter, typically 50 or 62.5 microns, compared to single-mode fibers, which have a core diameter of about 9 microns.
Light Propagation: The larger core of multimode fiber allows multiple light modes to propagate.
These modes travel at different angles, leading to reflections off the core-cladding boundary.
Distance and Bandwidth: Due to modal dispersion, where different light modes arrive at the receiver at different times, multimode fibers are suited for shorter distance applications compared to single-mode fibers. Typical distances are up to 550 meters for 10 Gbps Ethernet using OM4 multimode fiber.
Applications: Multimode fibers are commonly used in LANs (Local Area Networks), data centers, and for shorter distance data transmission due to their cost-effectiveness and ease of installation.
Network
Reference: CompTIA Network+ N10-007 Official Certification Guide, which covers fiber optic technologies, including the differences between multimode and single-mode fibers.
Cisco Networking Academy: Provides training materials and reference guides on the properties of different fiber optic cables.
Fiber Optic Association (FOA): A professional society dedicated to fiber optics, offering extensive information and certification on fiber optic technologies.
Multimode fibers are specifically designed for short-range communication with higher data rates and are typically used in environments like data centers, where high bandwidth over shorter distances is crucial. The reflections off the cladding, inherent to multimode fiber, facilitate this high-capacity communication.
D
Explanation:
Multimode fiber optic cables involve the transmission of light signals that bounce off the core’s cladding as they travel down the fiber. This characteristic differentiates it from single-mode fiber, where the light travels directly down the fiber without reflecting off the cladding.
Here are some detailed points about multimode fiber cables:
Construction: Multimode fibers have a larger core diameter, typically 50 or 62.5 microns, compared to single-mode fibers, which have a core diameter of about 9 microns.
Light Propagation: The larger core of multimode fiber allows multiple light modes to propagate.
These modes travel at different angles, leading to reflections off the core-cladding boundary.
Distance and Bandwidth: Due to modal dispersion, where different light modes arrive at the receiver at different times, multimode fibers are suited for shorter distance applications compared to single-mode fibers. Typical distances are up to 550 meters for 10 Gbps Ethernet using OM4 multimode fiber.
Applications: Multimode fibers are commonly used in LANs (Local Area Networks), data centers, and for shorter distance data transmission due to their cost-effectiveness and ease of installation.
Network
Reference: CompTIA Network+ N10-007 Official Certification Guide, which covers fiber optic technologies, including the differences between multimode and single-mode fibers.
Cisco Networking Academy: Provides training materials and reference guides on the properties of different fiber optic cables.
Fiber Optic Association (FOA): A professional society dedicated to fiber optics, offering extensive information and certification on fiber optic technologies.
Multimode fibers are specifically designed for short-range communication with higher data rates and are typically used in environments like data centers, where high bandwidth over shorter distances is crucial. The reflections off the cladding, inherent to multimode fiber, facilitate this high-capacity communication.
Question #3
After installing a series of Cat 8 keystones, a data center architect notices higher than normal interference during tests.
Which of the following steps should the architect take to troubleshoot the issue?
- A . Check to see if the end connections were wrapped in copper tape before terminating.
- B . Use passthrough modular crimping plugs instead of traditional crimping plugs.
- C . Connect the RX/TX wires to different pins.
- D . Run a speed test on a device that can only achieve 100Mbps speeds.
Correct Answer: A
A
Explanation:
Importance of Proper Termination:
Cat 8 cabling requires precise termination practices to ensure signal integrity and reduce interference. One common requirement is to wrap the end connections in copper tape to maintain shielding and reduce electromagnetic interference (EMI).
Interference Troubleshooting:
Interference in high-frequency cables like Cat 8 can be caused by improper shielding or grounding.
Checking the end connections for proper wrapping in copper tape is a crucial step.
Why Other Options are Less Likely:
Passthrough modular crimping plugs: Not specifically related to interference issues and are typically used for ease of cable assembly.
Connecting RX/TX wires to different pins: Would likely result in no connection or incorrect data transmission rather than interference.
Running a speed test on a device that can only achieve 100Mbps speeds: This would not diagnose interference and would not provide relevant information for Cat 8 cabling rated for higher speeds.
Corrective Actions:
Verify that all end connections are properly wrapped with copper tape before termination. Ensure that the shielding is continuous and properly grounded throughout the installation. Retest the cabling for interference after making corrections.
Reference: CompTIA Network+ study materials and structured cabling installation guides.
A
Explanation:
Importance of Proper Termination:
Cat 8 cabling requires precise termination practices to ensure signal integrity and reduce interference. One common requirement is to wrap the end connections in copper tape to maintain shielding and reduce electromagnetic interference (EMI).
Interference Troubleshooting:
Interference in high-frequency cables like Cat 8 can be caused by improper shielding or grounding.
Checking the end connections for proper wrapping in copper tape is a crucial step.
Why Other Options are Less Likely:
Passthrough modular crimping plugs: Not specifically related to interference issues and are typically used for ease of cable assembly.
Connecting RX/TX wires to different pins: Would likely result in no connection or incorrect data transmission rather than interference.
Running a speed test on a device that can only achieve 100Mbps speeds: This would not diagnose interference and would not provide relevant information for Cat 8 cabling rated for higher speeds.
Corrective Actions:
Verify that all end connections are properly wrapped with copper tape before termination. Ensure that the shielding is continuous and properly grounded throughout the installation. Retest the cabling for interference after making corrections.
Reference: CompTIA Network+ study materials and structured cabling installation guides.
Question #4
A network technician is troubleshooting a web application’s poor performance. The office has two internet links that share the traffic load.
Which of the following tools should the technician use to determine which link is being used for the web application?
- A . netstat
- B . nslookup
- C . ping
- D . tracert
Correct Answer: D
D
Explanation:
Understanding Tracert:
Traceroute Tool: tracert (Windows) or traceroute (Linux) is a network diagnostic tool used to trace the path that packets take from a source to a destination. It lists all the intermediate routers the packets traverse.
Determining Traffic Path:
Path Identification: By running tracert to the web application’s destination IP address, the technician can identify which route the traffic is taking and thereby determine which internet link is being used.
Load Balancing Insight: If the office uses load balancing for its internet links, tracert can help verify which link is currently handling the traffic for the web application.
Comparison with Other Tools:
netstat: Displays network connections, routing tables, interface statistics, and more, but does not trace the path of packets.
nslookup: Used for querying DNS to obtain domain name or IP address mapping, not for tracing packet routes.
ping: Tests connectivity and measures round-trip time but does not provide path information.
Implementation:
Open a command prompt or terminal.
Execute tracert [destination IP] to trace the route.
Analyze the output to determine the path and the link being used.
Reference: CompTIA Network+ study materials on network troubleshooting and diagnostic tools.
D
Explanation:
Understanding Tracert:
Traceroute Tool: tracert (Windows) or traceroute (Linux) is a network diagnostic tool used to trace the path that packets take from a source to a destination. It lists all the intermediate routers the packets traverse.
Determining Traffic Path:
Path Identification: By running tracert to the web application’s destination IP address, the technician can identify which route the traffic is taking and thereby determine which internet link is being used.
Load Balancing Insight: If the office uses load balancing for its internet links, tracert can help verify which link is currently handling the traffic for the web application.
Comparison with Other Tools:
netstat: Displays network connections, routing tables, interface statistics, and more, but does not trace the path of packets.
nslookup: Used for querying DNS to obtain domain name or IP address mapping, not for tracing packet routes.
ping: Tests connectivity and measures round-trip time but does not provide path information.
Implementation:
Open a command prompt or terminal.
Execute tracert [destination IP] to trace the route.
Analyze the output to determine the path and the link being used.
Reference: CompTIA Network+ study materials on network troubleshooting and diagnostic tools.
Question #5
A network administrator receives complaints of intermittent network connectivity issues. The administrator investigates and finds that the network design contains potential loop scenarios.
Which of the following should the administrator do?
- A . Enable spanning tree
- B . Configure port security
- C . Change switchport speed limits
- D . Enforce 802.1Q tagging
Correct Answer: A
A
Explanation:
Spanning Tree Protocol (STP) is designed to detect and prevent Layer 2 loops by blocking redundant paths. If loops are possible in the design, enabling STP ensures network stability.
B. Port security controls endpoint MAC addresses, not loops.
C. Speed limits address bandwidth, not loop prevention.
D. 802.1Q tagging allows VLAN separation but does not resolve loops.
Reference (CompTIA Network+ N10-009):
Domain: Network Operations ― Loop prevention, spanning tree, switch design.
A
Explanation:
Spanning Tree Protocol (STP) is designed to detect and prevent Layer 2 loops by blocking redundant paths. If loops are possible in the design, enabling STP ensures network stability.
B. Port security controls endpoint MAC addresses, not loops.
C. Speed limits address bandwidth, not loop prevention.
D. 802.1Q tagging allows VLAN separation but does not resolve loops.
Reference (CompTIA Network+ N10-009):
Domain: Network Operations ― Loop prevention, spanning tree, switch design.
Question #6
Which of the following technologies are X.509 certificates most commonly associated with?
- A . PKI
- B . VLAN tagging
- C . LDAP
- D . MFA
Correct Answer: A
A
Explanation:
X.509 certificates are most commonly associated with Public Key Infrastructure (PKI). These certificates are used for a variety of security functions, including digital signatures, encryption, and authentication.
PKI: X.509 certificates are a fundamental component of PKI, used to manage encryption keys and authenticate users and devices.
Digital Certificates: They are used to establish secure communications over networks, such as SSL/TLS for websites and secure email communication.
Authentication and Encryption: X.509 certificates provide the means to securely exchange keys and verify identities in various applications, ensuring data integrity and confidentiality.
Network
Reference: CompTIA Network+ N10-007 Official Certification Guide: Covers PKI and the role of X.509 certificates in network security.
Cisco Networking Academy: Provides training on PKI, certificates, and secure communications.
Network+ Certification All-in-One Exam Guide: Explains PKI, X.509 certificates, and their applications in securing network communications.
A
Explanation:
X.509 certificates are most commonly associated with Public Key Infrastructure (PKI). These certificates are used for a variety of security functions, including digital signatures, encryption, and authentication.
PKI: X.509 certificates are a fundamental component of PKI, used to manage encryption keys and authenticate users and devices.
Digital Certificates: They are used to establish secure communications over networks, such as SSL/TLS for websites and secure email communication.
Authentication and Encryption: X.509 certificates provide the means to securely exchange keys and verify identities in various applications, ensuring data integrity and confidentiality.
Network
Reference: CompTIA Network+ N10-007 Official Certification Guide: Covers PKI and the role of X.509 certificates in network security.
Cisco Networking Academy: Provides training on PKI, certificates, and secure communications.
Network+ Certification All-in-One Exam Guide: Explains PKI, X.509 certificates, and their applications in securing network communications.
Question #7
Which of the following is a company most likely enacting if an accountant for the company can only see the financial department’s shared folders?
- A . General Data Protection Regulation
- B . Least privilege network access
- C . Acceptable use policy
- D . End user license agreement
Correct Answer: B
B
Explanation:
Least privilege network access is a principle that restricts users’ access rights to only what is necessary for them to perform their job functions. In this case, the accountant’s access is limited to only the financial department’s shared folders, ensuring that they cannot access other parts of the network unnecessarily. This reduces the risk of unauthorized access and potential data breaches.
Reference: CompTIA Network+ Exam Objectives and official study guides.
B
Explanation:
Least privilege network access is a principle that restricts users’ access rights to only what is necessary for them to perform their job functions. In this case, the accountant’s access is limited to only the financial department’s shared folders, ensuring that they cannot access other parts of the network unnecessarily. This reduces the risk of unauthorized access and potential data breaches.
Reference: CompTIA Network+ Exam Objectives and official study guides.
Question #8
A technician needs to set up a wireless connection that utilizes MIMO on non-overlapping channels.
Which of the following would be the best choice?
- A . 802.11a
- B . 802.11b
- C . 802.11g
- D . 802.11n
Correct Answer: D
D
Explanation:
The 802.11n standard supports MIMO (Multiple Input Multiple Output), which allows multiple antennas to increase data throughput and improve reliability. Additionally, it uses non-overlapping channels in the 5 GHz band (and optionally the 2.4 GHz band), making it a good choice for high-speed, interference-resistant wireless connections. (Reference: CompTIA Network+ Study Guide, Chapter on Wireless Technologies)
D
Explanation:
The 802.11n standard supports MIMO (Multiple Input Multiple Output), which allows multiple antennas to increase data throughput and improve reliability. Additionally, it uses non-overlapping channels in the 5 GHz band (and optionally the 2.4 GHz band), making it a good choice for high-speed, interference-resistant wireless connections. (Reference: CompTIA Network+ Study Guide, Chapter on Wireless Technologies)
Question #9
A network administrator is creating a subnet that will include 45 separate hosts on a small private network within a large network architecture.
Which of the following options is the most efficient use of network addresses when assigning this network?
- A . 10.0.50.128/25
- B . 10.7.142.128/27
- C . 10.152.4.192/26
- D . 10.192.1.64/28
Correct Answer: C
C
Explanation:
For 45 hosts, the minimum subnet size must allow at least 46 usable addresses (1 each for network and broadcast addresses).
A /26 subnet provides 64 addresses, 62 usable ― suitable.
A /27 subnet gives only 30 usable ― insufficient.
A /25 offers 126 usable ― more than needed.
A /28 provides just 14 ― too small.
So, the most efficient subnet with minimal wastage is /26.
From Andrew Ramdayal’s guide:
“When designing subnets, always choose the smallest subnet mask that still accommodates all hosts. A /26 provides 62 usable host addresses, suitable for networks with about 50 hosts.”
C
Explanation:
For 45 hosts, the minimum subnet size must allow at least 46 usable addresses (1 each for network and broadcast addresses).
A /26 subnet provides 64 addresses, 62 usable ― suitable.
A /27 subnet gives only 30 usable ― insufficient.
A /25 offers 126 usable ― more than needed.
A /28 provides just 14 ― too small.
So, the most efficient subnet with minimal wastage is /26.
From Andrew Ramdayal’s guide:
“When designing subnets, always choose the smallest subnet mask that still accommodates all hosts. A /26 provides 62 usable host addresses, suitable for networks with about 50 hosts.”
Question #10
A network engineer deploys ten new virtual servers and configures the NICs.
Which of the following should the engineer update?
- A . Asset inventory
- B . Warranty support
- C . Rack diagrams
- D . IP address management
Correct Answer: D
D
Explanation:
The correct answer is D. IP address management. In the CompTIA Network+ N10-009 objectives, network documentation and operational procedures include maintaining accurate records for addressing, device configurations, and infrastructure changes. When a network engineer deploys new virtual servers and configures their NICs, the most directly affected documentation is the IP address management, often called IPAM. IPAM tracks assigned IP addresses, subnets, gateways, DNS settings, DHCP reservations, static assignments, and address availability.
Because the scenario specifically states that the engineer configured the NICs, the key networking detail is that each virtual server’s network interface likely received IP addressing information. Updating IP address management prevents duplicate IP assignments, supports troubleshooting, and helps administrators understand which addresses are in use across the environment.
The other options are less appropriate. Asset inventory may need updating when new servers are created, but the question emphasizes NIC configuration, making IPAM the better answer. Warranty support applies mainly to physical hardware and vendor support contracts, which is not the main concern for virtual servers. Rack diagrams document physical rack placement, power, and cabling, but virtual servers do not occupy rack space individually. Therefore, the best documentation to update after configuring NICs on new virtual servers is IP address management.
D
Explanation:
The correct answer is D. IP address management. In the CompTIA Network+ N10-009 objectives, network documentation and operational procedures include maintaining accurate records for addressing, device configurations, and infrastructure changes. When a network engineer deploys new virtual servers and configures their NICs, the most directly affected documentation is the IP address management, often called IPAM. IPAM tracks assigned IP addresses, subnets, gateways, DNS settings, DHCP reservations, static assignments, and address availability.
Because the scenario specifically states that the engineer configured the NICs, the key networking detail is that each virtual server’s network interface likely received IP addressing information. Updating IP address management prevents duplicate IP assignments, supports troubleshooting, and helps administrators understand which addresses are in use across the environment.
The other options are less appropriate. Asset inventory may need updating when new servers are created, but the question emphasizes NIC configuration, making IPAM the better answer. Warranty support applies mainly to physical hardware and vendor support contracts, which is not the main concern for virtual servers. Rack diagrams document physical rack placement, power, and cabling, but virtual servers do not occupy rack space individually. Therefore, the best documentation to update after configuring NICs on new virtual servers is IP address management.