CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 481:

  A network administrator installed a new VLAN to the network after a company added an additional floor to the office. Users are unable to obtain an IP address on the new VLAN, but ports on existing VLANs are working properly.

  Which of the following configurations should the administrator update?

  A. Scope size
  B. Address reservations
  C. Lease time
  D. IP helper
  D. IP helper

  ---

  Explanation

  When a new VLAN is created, it typically exists on a different subnet. If DHCP servers are on a different VLAN, the network needs an IP helper address to forward DHCP requests correctly. Without it, clients in the new VLAN won't receive an

  IP address.

  Breakdown of Options:

  Option A. Scope size - Increasing the DHCP scope would not resolve the issue if requestsaren't reaching the server.

  Option B. Address reservations - Reservations only assign specific addresses to devices; they do not fix DHCP communication issues.

  Option C. Lease time - Changing the lease time does not impact DHCP functionality across VLANs.

  Option D. IP helper - Correct answer. This forwards DHCP requests across VLANs to the DHCP server.

• Question 482:

  A technician is plugging an Ethernet cable into a switch to bring a new device online, but the device is not showing an active network connection. Previously, another technician turned off unused switchports as part of device hardening.

  Which of the following describes the port status?

  A. Error disabled
  B. Idle
  C. Suspended
  D. Administratively down
  D. Administratively down

  ---

  Explanation

  The correct answer is D. Administratively down. The question states that another technician had already turned off unused switchports as part of hardening. When a port is intentionally disabled by configuration, its status is described as administratively down. In other words, the switchport is not broken and has not failed on its own; it has simply been shut down by an administrator.

  This is a common security practice. Unused ports are often disabled so unauthorized devices cannot be plugged in and gain access to the network. If a legitimate device later needs that port, the administrator must re-enable it before the link can come up.

  The other answer choices do not line up as well with the scenario. Error disabled usually points to a protective shutdown caused by a violation or fault, such as port security or BPDU guard. Idle is not the standard description for a manually shut switchport in this context. Suspended can appear with certain switch features, but it is not the normal label for a port deliberately turned off as part of hardening.

  The phrase "turned off unused switchports" is the key detail. That clearly indicates a manual administrative shutdown, so administratively down is the best answer.

• Question 483:

  SIMULATION You have been tasked with setting up a wireless network in an office. The network will consist of 3 Access Points and a single switch. The network must meet the following parameters: The SSIDs need to be configured as CorpNet with a key of S3cr3t! The wireless signals should not interfere with each other The subnet the Access Points and switch are on should only support 30 devices maximum The Access Points should be configured to only support TKIP clients at a maximum speed INSTRUCTONS Click on the wireless devices and review their information and adjust the settings of the access points to meet the given requirements. If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

  

  A. See explanation below.
  B. PlaceHolder
  C. PlaceHolder
  D. PlaceHolder
  A. See explanation below.

  ---

  Explanation

  AP1

  192.168.1.3 /27 Gateway: 192.168.1.1 Mode: G

  SSD: CorpNet ** This is Case Sensitive, Whatever is on the test for SSID thats how it should be **

  Key: S3cr3t!

  Security Settings: WPA

  Speed: Auto/Auto

  AP2

  192.168.1.4 /27 Gateway: 192.168.1.1 Mode: G SSD: CorpNet ** This is Case Sensitive, Whatever is on the test for SSID thats how it should be ** Key: S3cr3t! Security Settings: WPA Speed: Auto/Auto

  AP3

  192.168.1.5 /27 Gateway: 192.168.1.1 Mode: G SSD: CorpNet ** This is Case Sensitive, Whatever is on the test for SSID thats how it should be ** Key: S3cr3t! Security Settings: WPA Speed: Auto/Auto

  192.168.1.2 Is your switch.

• Question 484:

  A network administrator is developing a method of device monitoring with the following requirements:

  1. Allows for explicit, by user, privilege management

  2. Includes centralized logging of changes

  3. Offers widely accessible remote management

  4. Provides support of service accounts.

  Which of the following will most closely meet these requirements?

  A. SNMP
  B. API
  C. SIEM
  D. SSO
  B. API

  ---

  Explanation

  1. API (Application Programming Interface) enables secure and granular access control, remote management, and logging, making it ideal for network monitoring.

  2. SNMP (A) is mainly used for device monitoring but lacks centralized logging and user-based privilege control.

  3. SIEM (C) is a security monitoring tool focused on log collection, not device management.

  4. SSO (D) is related to authentication, not monitoring.

  References:

  CompTIA Network+ N10-009 Official Documentation Network Monitoring&

  Management Technologies.

• Question 485:

  While troubleshooting connectivity issues, a junior network administrator is given explicit instructions to test the host's TCP/IP stack first.

  Which of the following commands should the network administrator run?

  A. ping 127.0.0.1
  B. ping 169.254.1.1
  C. ping 172.16.1.1
  D. ping 192.168.1.1
  A. ping 127.0.0.1

  ---

  Explanation

  The loopback address 127.0.0.1 is used to test the TCP/IP stack of the local machine. Pinging this address confirms whether the local system's networking stack is functioning correctly.

• Question 486:

  A network administrator is working to configure a new device to provide Layer 2 connectivity to various endpoints including several WAPs.

  Which of the following devices will the administrator MOST likely configure?

  A. WLAN controller
  B. Cable modem
  C. Load balancer
  D. Switch
  E. Hub
  D. Switch

  ---

  Explanation

  A switch is a device that provides Layer 2 connectivity to various endpoints by forwarding frames based on MAC addresses. A switch can also connect to several WAPs (wireless access points) to provide wireless connectivity to wireless devices.

• Question 487:

  Which of the following copper wire standards utilizes four pairs of wires to achieve Gigabit Ethernet speeds?

  A. 1000BASE-FX
  B. 1000BASE-T
  C. 1000BASE.LR
  D. 1000BASE-SX
  B. 1000BASE-T

• Question 488:

  A network administrator is troubleshooting a network connectivity issue. The workstation can connect to the internet but not to internal network resources.

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

  A. APIPA address
  B. Rogue DHCP server
  C. Unreachable DNS server
  D. Incorrect NAT settings
  D. Incorrect NAT settings

• Question 489:

  Which of the following most likely determines the size of a rack for installation? (Select two).

  A. KVM size
  B. Switch depth
  C. Hard drive size
  D. Cooling fan speed
  E. Outlet amperage
  F. Server height
  B. Switch depth
  F. Server height

• Question 490:

  A network technician needs to use an RFC1918 IP space for a new office that only has a single public IP address.

  Which of the following subnets should the technician use for the LAN?

  A. 10.10.10.0/24
  B. 127.16.10.0/24
  C. 174.16.10.0/24
  D. 198.18.10.0/24
  A. 10.10.10.0/24

  ---

  Explanation

  The RFC1918 IP space is a set of private IP addresses that are not routable on the public Internet and can be used for internal networks. The RFC1918 IP space consists of three ranges: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/161 Out of the four options, only A. 10.10.10.0/24 belongs to one of these ranges, specifically the 10.0.0.0/8 range. Therefore, the technician should use this subnet for the LAN.

  References:

  https://en.wikipedia.org/wiki/Private_network