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[Hardware] N10-009 Interactive Questions, Latest N10-009 Guide Files

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【Hardware】 N10-009 Interactive Questions, Latest N10-009 Guide Files

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CompTIA N10-009 Exam Syllabus Topics:
TopicDetails
Topic 1
  • Network Implementation: For network technicians and junior network engineers, this section covers Characteristics of routing technologies, Configuration of switching technologies and features, and
Topic 2
  • Networking Concepts: For network administrators and IT support professionals, this domain covers
Topic 3
  • Network Security: This section of the exam for cybersecurity specialists and network security administrators covers  the importance of basic network security concepts, Various types of attacks and their impact on the network, application of network security features, defense techniques, and solutions.| Network Troubleshooting: For help desk technicians and network support specialists, this section covers troubleshooting methodology, troubleshooting common cabling and physical interface issues, troubleshooting common issues with network services, and use of appropriate tools or protocols to solve networking issues.

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CompTIA Network+ Certification Exam Sample Questions (Q351-Q356):NEW QUESTION # 351
Which of the following is the best networking appliance for interconnecting multiple logical networks and forwarding data packets between them while minimizing latency?
  • A. Firewall
  • B. Load balancer
  • C. Router
  • D. Layer 2 switch
Answer: C
Explanation:
The correct appliance is a router, which is specifically designed to interconnect multiple networks and forward packets based on IP addresses. Routers operate at Layer 3 (Network layer) of the OSI model and make intelligent forwarding decisions to ensure data reaches the correct destination network.
A . Firewall can also forward traffic, but its primary function is security, not routing efficiency.
C . Layer 2 switches connect devices within the same LAN but do not forward packets between different networks without routing capability.
D . Load balancers distribute traffic among servers but are not general-purpose routers.
Modern enterprise routers are optimized to minimize latency by using fast switching and hardware acceleration, making them ideal for interconnecting logical networks securely and efficiently.
Reference:
Domain: Network Infrastructure - Routers, Layer 3 devices, inter-network communication.

NEW QUESTION # 352
After a networking intern plugged in a switch, a significant number of users in a building lost connectivity.
Which of the following is the most likely root cause?
  • A. LLDP misconfiguration
  • B. Port security issue
  • C. Native VLAN mismatch
  • D. VTP update
Answer: C
Explanation:
When a switch is improperly connected to a network, it can cause widespread connectivity issues, especially if there's a misconfiguration in VLAN settings. A Native VLAN mismatch occurs when two switches connected via a trunk link have different native VLANs configured for untagged traffic. This can cause traffic to be sent to the wrong VLAN or dropped, resulting in connectivity loss for users.
Scenario Analysis: The intern likely connected the switch without ensuring that the trunk port's native VLAN matched the existing network configuration. This is a common issue in Cisco-based networks when trunk links are misconfigured.
Why not VTP update? VLAN Trunking Protocol (VTP) updates propagate VLAN configurations across switches. While a VTP misconfiguration could cause issues, it's less likely to immediately disrupt connectivity for many users unless the VTP server deleted critical VLANs, which is not implied here.
Why not Port security issue? Port security restricts access based on MAC addresses, typically affecting individual ports, not causing widespread outages.
Why not LLDP misconfiguration? Link Layer Discovery Protocol (LLDP) is used for device discovery, and misconfiguration is unlikely to cause a broad loss of connectivity.
Reference:CompTIA Network+ N10-009 Objective 2.2: Explain the purpose of network segmentation and VLAN configuration. The CompTIA Network+ Study Guide (e.g., Chapter 6: Switching) discusses VLAN trunking and the importance of matching native VLANs on trunk links to prevent connectivity issues. Native VLAN mismatches are highlighted as a common cause of network disruptions.

NEW QUESTION # 353
A user connects to a corporate VPN via a web browser and is able to use TLS to access the internal financial system to input a time card. Which of the following best describes how the VPN is being used?
  • A. Client-to-site
  • B. Full tunnel
  • C. Site-to-site
  • D. Clientless
Answer: D
Explanation:
The scenario describes a user connecting to a corporate VPN via a web browser using TLS to access an internal system. This setup is best described as a "clientless" VPN. Clientless VPNs do not require a VPN client to be installed on the user's device; instead, they rely on a standard web browser to establish the connection. This method is particularly useful for providing secure, remote access to applications through a web interface without the need for additional software installations.
Reference: CompTIA Network+ Certification Exam Objectives - Remote Access Methods section.

NEW QUESTION # 354
A network technician is adding a new switch to increase capacity on the network. The technician connects the two switches using a single cable. Several hosts are moved to the new switch, but none of the hosts can access the network or internet. Which of the following should the technician do to resolve the issue?
  • A. Configure the connecting ports as trunk ports
  • B. Install STP cables between the switches
  • C. Increase the PoE budget for the switches
  • D. Set up link aggregation on the uplink ports
Answer: A
Explanation:
The correct solution is to configure the connecting ports as trunk ports. When connecting switches, the uplink ports must be configured to carry traffic for multiple VLANs (trunking), not just a single access VLAN. Without trunking, VLAN tags may be dropped, and traffic from hosts will not reach the rest of the network or internet.
B . STP cables is a misnomer - STP refers to Spanning Tree Protocol or Shielded Twisted Pair cables, neither of which solves this logical configuration issue.
C . PoE budget is irrelevant because switches and hosts in this context don't require PoE.
D . Link aggregation (LACP, EtherChannel) is for increasing bandwidth/redundancy across multiple links, not required with a single cable.
By enabling trunking on the uplink ports, the switches can pass VLAN-tagged traffic, ensuring hosts connected to the new switch have access to the same resources as those on the existing switch.

NEW QUESTION # 355
A virtual machine has the following configuration:
*IPv4 address: 169.254.10.10
*Subnet mask: 255.255.0.0
The virtual machine can reach colocated systems but cannot reach external addresses on the Internet. Which of the following Is most likely the root cause?
  • A. TheDHCP server is offline.
  • B. TheIP address is an RFC1918 private address.
  • C. Thesubnet mask is incorrect.
  • D. TheDNS server is unreachable.
Answer: A
Explanation:
* Understanding the 169.254.x.x Address:
* An IPv4 address in the range of 169.254.x.x is an Automatic Private IP Addressing (APIPA) address, assigned when a DHCP server is unavailable.
* DHCP Server Offline:
* APIPA Assignment: When a device cannot obtain an IP address from a DHCP server, it assigns itself an APIPA address to enable local network communication. This allows communication with other devices on the same local subnet but not with external networks.
* Resolution: Ensure the DHCP server is operational. Check for connectivity issues between the virtual machine and the DHCP server, and verify the DHCP server settings.
* Comparison with Other Options:
* The subnet mask is incorrect: The subnet mask 255.255.0.0 is appropriate for the 169.254.x.x range and does not prevent external access by itself.
* The IP address is an RFC1918 private address: RFC1918 addresses are private IP ranges (10.x.x.
x, 172.16.x.x-172.31.x.x, 192.168.x.x) but 169.254.x.x is not one of them.
* The DNS server is unreachable: While this could affect name resolution, it would not prevent the assignment of a non-APIPA address or local network communication.
* Troubleshooting Steps:
* Verify the DHCP server's status and connectivity.
* Restart the DHCP service if necessary.
* Renew the IP lease on the virtual machine using commands such as ipconfig /renew (Windows) or dhclient (Linux).

NEW QUESTION # 356
......
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