CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 351:

  Which of the following devices operates primarily at Layer 3 of the OSI model?

  A. Hub
  B. Switch
  C. Router
  D. Bridge
  C. Router

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  Explanation

  3. Bridges also function at Layer 2. Therefore, routers are the primary devices responsible for Layer 3 operations.

• Question 352:

  SIMULATION

  Users are unable to access files on their department share located on file server 2. The network administrator has been tasked with validating routing between networks hosting workstation A and file server 2.

  INSTRUCTIONS

  Click on each router to review output, identify any issues, and configure the appropriate solution.

  If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

  

  

  

  

  A. See the solution below in Explanation.
  B. PlaceHolder
  C. PlaceHolder
  D. PlaceHolder
  A. See the solution below in Explanation.

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  Explanation

  To validate routing between networks hosting Workstation A and File Server 2, follow these steps:

  Add Static Routes:

  Gateway of last resort is 0.0.0.0 to network 0.0.0.0 S* 0.0.0.0/0 is directly connected, GigabitEthernet3 10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks C 10.0.4.0/22 is directly connected, GigabitEthernet2 C 10.0.6.0/24 is directly connected, GigabitEthernet2 L 10.0.6.1/32 is directly connected, GigabitEthernet2 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.27.0/30 is directly connected, GigabitEthernet3 L 172.16.27.1/32 is directly connected, GigabitEthernet3

  Gateway of last resort is 0.0.0.0 to network 0.0.0.0 S* 0.0.0.0/0 is directly connected, GigabitEthernet1 10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks C 10.0.0.0/22 is directly connected, GigabitEthernet1 L 10.0.0.1/32 is directly connected, GigabitEthernet1 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.27.4/30 is directly connected, GigabitEthernet1 L 172.16.27.5/32 is directly connected, GigabitEthernet1

  10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks S 10.0.0.0/22 [1/0] via GigabitEthernet1

  S 10.0.4.0/22 [1/0] via GigabitEthernet2

  172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.27.0/30 is directly connected, GigabitEthernet2 L 172.16.27.2/32 is directly connected, GigabitEthernet2 C 172.16.27.4/30 is directly connected, GigabitEthernet1 L 172.16.27.6/32 is directly connected, GigabitEthernet1

  Install Static Route to 10.0.0.0/22 via 172.16.27.1 (assuming Router C's IP is 172.16.27.1):

  Destination Prefix: 10.0.0.0

  Destination Prefix Mask: 255.255.252.0

  Interface: GigabitEthernet3

  Install Static Route to 10.0.4.0/22 via 172.16.27.5 (assuming Router C's IP is 172.16.27.5):

  Destination Prefix: 10.0.4.0

  Destination Prefix Mask: 255.255.252.0

  Interface: GigabitEthernet1

  Install Static Route to 10.0.6.0/24 via 172.16.27.2 (assuming Router A's IP is 172.16.27.2):

  Destination Prefix: 10.0.6.0

  Destination Prefix Mask: 255.255.255.0

  Interface: GigabitEthernet2

  Install Static Route to 10.0.0.0/22 via 172.16.27.1 (assuming Router B's IP is 172.16.27.1):

  Destination Prefix: 10.0.0.0

  Destination Prefix Mask: 255.255.252.0

  Interface: GigabitEthernet1

  Summary of Static Routes:

  Router A:

  Router B:

  Router C:

  These configurations ensure that each router knows the correct paths to reach Workstation A and File Server 2, resolving the connectivity issue.

• Question 353:

  A technician connects an IP camera to a switch port. The port successfully powers a VoIP phone, but the camera does not power on.

  Select the MOST likely cause.

  A. PoE is disabled on the switchport
  B. The cable is faulty
  C. The camera requires higher PoE standard
  D. VLAN is misconfigured
  C. The camera requires higher PoE standard

• Question 354:

  Which of the following disaster recovery concepts is calculated by dividing the total hours of operation by the total number of units?

  A. MTTR
  B. MTBF
  C. RPO
  D. RTO
  B. MTBF

• Question 355:

  The results of a recently completed site survey indicate a significant, undesired RSSI in the parking lot and other exterior areas near the main building. The wireless technician would like to mitigate access to the wireless network in exterior access areas. The current access point settings are listed in the following table:

  

  Which of the following is the BEST step for the technician to take to resolve the issue?

  A. Reconfigure AP2 and AP3 for non-overlapping channels.
  B. Implement directional antennas on AP1 and AP2.
  C. Raise the power settings on AP2 and AP3.
  D. Change the SSID on AP1 and AP2.
  B. Implement directional antennas on AP1 and AP2.

• Question 356:

  A company is opening a new site that needs to be divided into subnets that accommodate 75 hosts each.

  Which of the following is the most efficient subnet?

  A. 192.168.13.0/25
  B. 192.168.13.0/26
  C. 192.168.13.0/27
  D. 192.168.13.0/28
  A. 192.168.13.0/25

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  Explanation

  To support 75 hosts per subnet, you must choose a subnet size that provides at least 75 usable IP addresses. In IPv4, usable hosts per subnet equals 2^(host bits) # 2 (subtracting network and broadcast). A /25 leaves 7 host bits (32-25 = 7), giving 2^7 # 2 = 128 # 2 = 126 usable hosts, which meets the requirement and is the smallest (most efficient) option listed that does so. A /26 leaves 6 host bits, giving 62 usable hosts, which is insufficient. A /27 gives 30 usable, and a /28

  gives 14 usable, both far below 75. Network+ subnetting objectives emphasize selecting the smallest subnet that satisfies the host requirement to conserve address space while meeting growth and design constraints. Therefore, 192.168.13.0/25 is the most efficient option that accommodates at least 75 hosts per subnet.

• Question 357:

  A network administrator received reports that a 40Gb connection is saturated. The only server the administrator can use for data collection in that location has a 10GB connection to the network.

  Which of the following is the best method to use on the server to determine the source of the saturation?

  A. Port mirroring
  B. Log aggregation
  C. Flow data
  D. Packet capture
  C. Flow data

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  Explanation

  Flow data, collected through flow monitoring protocols such as NetFlow, sFlow, or IPFIX, provides aggregated information about network traffic, including details on source and destination IP addresses, ports, protocols, and more. This method doesn't capture the actual packet contents but summarizes network traffic flow.

  By leveraging flow data, the network administrator can gather information about the traffic patterns and bandwidth usage across the network. This method is less resource-intensive than performing packet captures and can provide valuable insights into the sources and destinations of the traffic causing the saturation on the 40Gb connection.

• Question 358:

  Which of the following is a type of NAC that uses a set of policies to allow or deny access to the network based on the user's identity?

  A. Standard ACL
  B. MAC filtering
  C. 802.1X
  D. SSO
  C. 802.1X

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  Explanation

  802.1X is a port-based Network Access Control (NAC) method that enforces authentication before allowing access to the network. It uses a RADIUS server for identity verification and policy enforcement, ensuring only authorized users/ devices gain access.

  Option A: Standard ACL filters traffic by IP, not identity.

  Option B: MAC filtering controls devices by hardware address but can be spoofed.

  Option D: SSO (Single Sign-On) provides user convenience across services, not network-level access control.

  References (CompTIA Network+ N10-009):

  Domain: Network Security - NAC, 802.1X authentication, identity-based access.

• Question 359:

  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
  A. Hosts file

• Question 360:

  Which of the following protocols uses the Dijkstra's Link State Algorithm to establish routes inside its routing table?

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