CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 51:

  A technician is deploying new networking hardware for company branch offices. The bridge priority must be properly set.

  Which of the following should the technician configure?

  A. Spanning tree protocol
  B. Jumbo frames
  C. Perimeter network
  D. Port security
  A. Spanning tree protocol

• Question 52:

  A network administrator needs to divide a Class B network into four equal subnets, each with a host range of 1,000 hosts.

  Which of the following subnet masks should the administrator use?

  A. 255.255.0.0
  B. 255.255.252.0
  C. 255.255.255.0
  D. 255.255.255.128
  B. 255.255.252.0

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  Explanation

  The best answer is B. 255.255.252.0, which is a /22 mask. A Class B network starts with a default mask of 255.255.0.0 or /16. The question says the administrator wants four equal subnets, which means borrowing 2 bits from the host portion, since 2 borrowed bits gives 22 = 4 subnets. That moves the mask from /16 to /18 if subnetting is based only on splitting the Class B into four equal parts.

  However, the answer choices point toward the host requirement as the deciding factor. Each subnet needs to support about 1,000 hosts. A /22 leaves 10 host bits, which gives 21# = 1024 total addresses, or 1022 usable hosts after subtracting the network and broadcast addresses. That fits the requirement. Among the options provided, 255.255.252.0 is the only mask that supports around 1,000 hosts per subnet.

  The smaller masks, /24 and /25, do not allow enough hosts. The default Class B mask, /16, does not subnet the network at all. Based on the available choices and the host-capacity requirement, 255.255.252.0 is the correct exam answer.

• Question 53:

  A packet has a destination address that is located outside of the local network.

  Which of the following should be used to route this packet out of the local network?

  A. DNS server
  B. Load balancer
  C. DHCP server
  D. Default gateway
  D. Default gateway

• Question 54:

  A laptop user gets an error when trying to access the company's intranet site.

  A technician runs ipconfig /all with the following results:

  Autoconfiguration IPv4 Address: 169.254.0.5 (Preferred) Subnet Mask: 255.255.0.0 Default Gateway: (blank)

  DHCP Server: (blank)

  Which of the following is most likely causing the issue?

  A. Short DHCP lease duration
  B. IIS server malfunction
  C. Address pool exhaustion
  D. IDS misconfiguration
  C. Address pool exhaustion

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  Explanation

  The correct answer is C. Address pool exhaustion. The laptop has assigned itself an address in the 169.254. x.x range, which is an APIPA address. That happens when the device is configured to use DHCP but cannot successfully obtain an address lease from a DHCP server. The missing default gateway and DHCP server entries support that conclusion.

  Among the choices, the most likely reason is that the DHCP scope has run out of available addresses. When the pool is exhausted, new clients cannot receive a valid IP configuration and fall back to an automatic private address. As a result, the laptop will not be able to reach internal company resources like the intranet because it is not properly configured for the network. The other answers do not fit the evidence. A short DHCP lease duration may cause more frequent renewals, but it does not directly explain the self-assigned APIPA address. An IIS server malfunction would affect the web service itself, not the client's local IP configuration. An IDS misconfiguration also would not normally result in a 169.254 address on the host.

  The output clearly indicates a DHCP assignment failure, and from the options provided, address pool exhaustion is the best match.

• Question 55:

  A user's VoIP phone and workstation are connected through an inline cable.

  The user reports that the VoIP phone intermittently reboots, but the workstation is not having any network-related issues Which of the following is the most likely cause?

  A. The PoE power budget is exceeded.
  B. Port security is violated.
  C. The signal is degraded
  D. The Ethernet cable is not working
  A. The PoE power budget is exceeded.

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  Explanation

  Power over Ethernet (PoE) delivers power to devices such as VoIP phones over the same cables used for data. If the total power requirement of connected devices exceeds the PoE power budget of the switch or injector, some devices may not receive adequate power and could intermittently reboot. This issue would not affect the workstation, which is likely receiving power separately.

  References:

  CompTIA Network+ Exam Objectives and official study guides.

• Question 56:

  A junior network technician at a large company needs to create networks from a Class C address with 14 hosts per subnet.

  Which of the following numbers of host bits is required?

  A. One
  B. Two
  C. Three
  D. Four
  D. Four

• Question 57:

  A technician reviews interface statistics:

  Input errors: 980

  CRC errors: 870

  Collisions: 0

  What is the MOST likely issue?

  A. Duplex mismatch
  B. Bad cable
  C. Broadcast storm
  D. VLAN mismatch
  B. Bad cable

• Question 58:

  A small company has the following IP addressing strategy:

  User subnet: 192.168.1.0/24

  Voice subnet: 192.168.2.0/24

  Server subnet: 192.168.10.0/24

  A user is unable to connect to the company fileshare server located at 192.168.10.1. The user's networking configuration is:

  Physical Address: 7A-01-7A-21-12-01 IPv4 Address: 192.168.1.50

  Subnet Mask: 255.255.0.0

  Default Gateway: 192.168.1.200

  DNS Servers: 192.168.10.11

  Which of the following will most likely correct the issue?

  A. Changing the IPv4 address to 192.168.10.1
  B. Changing the subnet mask to 255.255.255.0
  C. Changing the DNS servers to internet IPs
  D. Changing the physical address to 7A-01-7A-21-01-50
  B. Changing the subnet mask to 255.255.255.0

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  Explanation

  If the user cannot communicate with 192.168.10.1, they might be on a different subnet Changing the subnet. mask to 255.255.255.0 ensures the user and the file server are in the same subnet.

  Breakdown of Options:

  Option A. Changing the IPv4 address to 192.168.10.1?This would conflict with the server's IP.

  Option B. Changing the subnet mask to 255.255.255.0? Correct answer. Ensures both the user and the server are on the same subnet.

  Option C. Changing the DNS servers?DNS does not affect local network connectivity.

  Option D. Changing the physical address?The MAC address does not impact subnet communication.

• Question 59:

  A network administrator needs to create a way to redirect a network resource that has been on the local network but is now hosted as a SaaS solution.

  Which of the following records should be used to accomplish the task?

  A. TXT
  B. AAA
  C. PTR
  D. CNAME
  D. CNAME

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  Explanation

  CNAME stands for Canonical Name, and it is a type of DNS record that creates an alias for another domain name. A CNAME record can be used to redirect a network resource that has been moved to a different location, such as a SaaS solution. For example, if a web server that was previously hosted on the local network with the domain name www.example.com is now hosted by a SaaS provider with the domain name www.saasprovider.com, a CNAME record can be created to point www.example.com to www.saasprovider.com. This way, the users can still access the web server using the original domain name, and the DNS server will resolve it to the new domain name.

• Question 60:

  After providing a username and password, a user must input a passcode from a phone application.

  Which of the following authentication technologies is used in this example?

  A. SSO
  B. LDAP
  C. MFA
  D. SAML
  C. MFA

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  Explanation

  This is an example of Multi-Factor Authentication (MFA) because it requires: Something you know(username/password)

  Something you have(a phone-generated passcode)

  Breakdown of Options:

  Option

  A. SSO (Single Sign-On) - Allows one login for multiple services, but does not add a second authentication factor Option

  B. LDAP (Lightweight Directory Access Protocol) - Used for directory authentication not MFA Option

  C. MFA (Multi-Factor Authentication) - Correct answer. Uses multiple authentication factors for better security Option

  D. SAML (Security Assertion Markup Language) - Used for federated identity management not, multi-factor authentication