CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 341:

  A user cannot access a website using its domain name but can access it via IP address.

  Which of the following is the issue?

  A. DHCP
  B. DNS
  C. NAT
  D. VLAN
  B. DNS

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  Explanation

  If a user can access a website using its IP address but not its domain name, the issue is related to DNS resolution. DNS translates human-readable domain names into IP addresses. If DNS is misconfigured or unavailable, name resolution fails while direct IP connectivity still works. DHCP assigns IP settings, NAT translates addresses, and VLANs segment networks. DNS is essential for normal internet usability.

• Question 342:

  A network administrator is setting up two new firewalls for redundancy and needs to implement a redundant internet connection.

  Which of the following routing technologies will the administrator most likely use?

  A. EIGRP
  B. RIPv2
  C. OSPF
  D. BGP
  D. BGP

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  Explanation

  The answer is D. BGP. When a company wants a redundant internet connection, especially across more than one external path or provider, Border Gateway Protocol (BGP) is the routing technology most commonly associated with that design. BGP is used between autonomous systems and is the standard protocol for making routing decisions across the internet or between an organization and one or more ISPs. The other options are interior routing protocols. EIGRP, RIPv2, and OSPF are generally used inside an organization to exchange routes within a private network environment. They are not the normal answer when the question specifically says internet connection redundancy. That wording points outward, beyond the internal LAN or campus routing domain.

  In practical terms, BGP gives administrators a way to influence path selection, advertise network prefixes, and maintain reachability if one outside connection fails. That is why it appears in questions involving multihoming, ISP failover, or resilient edge connectivity. Since the scenario mentions redundant firewalls and a need for a redundant internet connection, the best match is the routing technology designed for external route exchange. For Network+, that technology is

  BGP.

• Question 343:

  A network technician added a new workstation to the network and needs to make a custom, shielded cable that is 492ft (150m) with both ends wired to TIA/EIA-568A standards. The workstation is not establishing a link to the switchport.

  Which of the following is the cause of the issue?

  A. Cable shielding
  B. Attenuation
  C. Incorrect pinout
  D. Near-end crosstalk
  B. Attenuation

• Question 344:

  Which of the following is the most likely benefit of installing server equipment in a rack?

  A. Simplified troubleshooting process
  B. Decreased power consumption
  C. Improved network performance
  D. Increased compute density
  D. Increased compute density

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  Explanation

  Installing server equipment in a rack increases compute density by allowing multiple servers to be organized efficiently in a vertical configuration, saving space while housing more devices in a smaller footprint. This is critical for data centers and businesses with high hardware demands.

  Simplified troubleshooting process (A): While racks can aid in organizing equipment, this is a secondary benefit, not the primary purpose. Decreased power consumption (B): Rack installation does not directly reduce power usage; equipment power consumption remains the same. Improved network performance (C): Racking servers does not inherently improve network performance; that depends on network configurations.

• Question 345:

  Which of the following cable connectors should be used with SFP transceivers?

  A. RJ45
  B. LC
  C. MT
  D. F-type
  B. LC

• Question 346:

  A network technician implements a switch with multiple VLANs.

  Which of the following items should the technician configure to ensure that clients can communicate with clients in other VLANs?

  A. VPC
  B. VXLAN
  C. ACL
  D. SVI
  D. SVI

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  Explanation

  To enable communication between VLANs, the technician must configure inter-VLAN routing. On a Layer 3 switch, this is commonly done by creating an SVI (Switched Virtual Interface) for each VLAN. An SVI provides a virtual Layer 3 interface with an IP address that acts as the default gateway for hosts in that VLAN. Once SVIs exist and routing is enabled, the switch can route traffic between VLAN subnets internally, allowing clients in different VLANs to communicate (subject to any security controls). This aligns with Network+ (N10-009) infrastructure objectives covering VLANs, Layer 2/Layer 3 switching, and the requirement for routing to cross broadcast domains.

  ACLs can permit or deny inter-VLAN traffic, but they do not create the routing function by themselves. VXLAN is an overlay tunneling technology used mainly in data centers to extend Layer 2 networks over Layer 3 fabrics, not the standard solution for basic VLAN-to-VLAN connectivity on a switch. VPC is not the required configuration element for inter-VLAN routing in this context. Therefore, configuring SVIs is the correct and most direct answer.

• Question 347:

  After upgrading to a SOHO router that supports Wi-Fi 6, the user determines throughput has not increased.

  Which of the following is the MOST likely cause of the issue?

  A. The wireless router is using an incorrect antenna type.
  B. The user's workstation does not support 802.11ax.
  C. The encryption protocol is mismatched.
  D. The network is experiencing interference.
  B. The user's workstation does not support 802.11ax.

• Question 348:

  Which of the following should a company implement in order to share a single IP address among all the employees in the office?

  A. STP
  B. BGP
  C. PAT
  D. VXLAN
  C. PAT

• Question 349:

  While troubleshooting a VoIP handset connection, a technician's laptop is able to successfully connect to network resources using the same port. The technician needs to identify the port on the switch.

  Which of the following should the technician use to determine the switch and port?

  A. LLDP
  B. IKE
  C. VLAN
  D. netstat
  A. LLDP

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  Explanation

  Link Layer Discovery Protocol (LLDP) is a network protocol used for discovering devices and their capabilities on a local area network, primarily at the data link layer (Layer 2). It helps in identifying the connected switch and the specific port to which a device is connected. When troubleshooting a VoIP handset connection, the technician can use LLDP to determine the exact switch and port where the handset is connected. This protocol is widely used in network management to facilitate the discovery of network topology and simplify troubleshooting.

  Other options such as IKE (Internet Key Exchange), VLAN (Virtual LAN), and netstat (network statistics) are not suitable for identifying the switch and port information. IKE is used in setting up secure IPsec connections, VLAN is used for segmenting networks, and netstat provides information about active connections and listening ports on a host but not for discovering switch port details.

  References:

  CompTIA Network+ Certification Exam Objectives - Network Troubleshooting and Tools section.

• Question 350:

  Which of the following best describes the purpose of a UPS and PDU in a network installation?

  A. To support voltage requirements for devices in an IDF
  B. To manage power consumption in the MDF
  C. To connect multiple devices to a single network connection
  D. To regulate temperature in the MDF and IDF
  A. To support voltage requirements for devices in an IDF

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  Explanation

  A UPS (Uninterruptible Power Supply) and PDU (Power Distribution Unit) are installed to provide reliable, properly distributed electrical power to network equipment -especially in wiring closets such as an IDF and in main equipment rooms. In Network+ (N10-009) infrastructure objectives, a UPS protects against power loss and instability by supplying battery-backed power during outages and often providing conditioning to reduce the impact of sags, spikes, and brief interruptions.

  A PDU then distributes that power to multiple devices in a rack (switches, routers, firewalls, AP controllers), often offering organized outlets and, in managed models, monitoring/control features.

  Option A is the best match because it reflects the practical purpose: ensuring network devices receive appropriate and continuous power in distribution frames/closets.

  Option B is partially related, but "managing power consumption in the MDF" is too narrow and not as accurate as the broader function of providing backup and distribution power.

  Option C describes a network switch, not power equipment.

  Option D refers to HVAC/environmental controls, not UPS/PDU functionality. Hence, A is correct.