CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 661:

  Which of the following services provides the network information for the address when IPv6 is used for SLAAC addressing?

  A. EUI-64
  B. IPv6 unicast routing
  C. Router advertisement
  D. DHCPv6
  C. Router advertisement

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  Explanation

  Router advertisement is part of the Neighbor Discovery Protocol (NDP) in IPv6 and is used in Stateless Address Autoconfiguration (SLAAC) to provide network information to IPv6 hosts. Router advertisements inform hosts about the presence of routers, network prefixes for address configuration, and various other parameters necessary for the host to configure its IPv6 address and connect to the IPv6 network. This mechanism allows IPv6 devices to automatically configure themselves with an IPv6 address and other related network information without the need for a DHCPv6 server, although DHCPv6 can be used alongside SLAAC for additional configuration options like DNS server addresses.

• Question 662:

  Which of the following is a difference between EOL and EOS?

  A. EOL discontinues the product but may offer support.
  B. EOS replaces free support with a subscription model.
  C. EOS only applies to physical products.
  D. EOL still guarantees warranty service.
  A. EOL discontinues the product but may offer support.

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  Explanation

  The correct answer is EOL discontinues the product but may offer support. According to CompTIA Network+ (N10-009) objectives related to lifecycle management and vendor support policies, End of Life (EOL) indicates that a product is no longer being manufactured or sold by the vendor. However, after EOL is declared, the vendor may continue to provide limited support, updates, or warranty services for a defined period.

  In contrast, End of Support (EOS) means the vendor has stopped providing technical assistance, patches, firmware updates, and security fixes for the product. Once a product reaches EOS, organizations are responsible for maintaining it without vendor assistance, which can introduce operational and security risks.

  Option B is incorrect because EOS does not typically convert support into a subscription model-it signifies the termination of support.

  Option C is incorrect because EOS applies to both hardware and software products.

  Option D is incorrect because warranty terms depend on vendor policy and are not guaranteed after EOL status.

  Therefore, the key distinction is that EOL ends product sales, while EOS ends vendor support.

• Question 663:

  Which of the following best describes a characteristic of a DNS poisoning attack?

  A. DNS address records are edited and changed on a DNS server.
  B. An attacker sets up a malicious DNS server in place of a legitimate server.
  C. DNS client requests are intercepted and false responses are returned.
  D. False DNS records are injected into cache on a DNS server.
  D. False DNS records are injected into cache on a DNS server.

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  Explanation

  DNS poisoning (also commonly called DNS cache poisoning) is characterized by inserting fraudulent DNS data into a resolver's cache so that subsequent queries return incorrect IP mappings. Option D describes this precisely: false DNS records are injected into a DNS server's cache, causing users to be redirected to attacker-controlled destinations even when they request a legitimate hostname. This aligns with Network+ security objectives covering common network attacks targeting name resolution and trust relationships. Editing authoritative DNS records on a DNS server (A) implies direct compromise or unauthorized administrative change, which is a different scenario than cache poisoning. Setting up a malicious DNS server in place of a legitimate server (B) is closer to DNS hijacking or rogue DNS configuration rather than cache poisoning. Intercepting client requests and returning false responses (C) describes man-in-the-middle style spoofing on the wire; while related, the defining "poisoning" trait is the persistence created by corrupting the cache so the bad answer continues to be served. For defensive relevance in Network+ scope, cache poisoning highlights the importance of DNS security controls such as source port randomization, transaction ID entropy, and DNSSEC validation where applicable.

• Question 664:

  A user cannot access an external server for a client after connecting to a VPN.

  Which of the following commands would a support agent most likely use to examine the issue? (Select two).

  A. nslookup
  B. tcpdump
  C. arp
  D. dig
  E. tracert
  F. route print
  E. tracert
  F. route print

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  Explanation

  When a user connects to a VPN and experiences connectivity issues to an external server, the problem is often related to routing or network path issues.

  Option E tracert:

  Traces the path packets take from the user's device to the destination server.

  Helps determine if the traffic is being blocked or misrouted.

  Option F route print:

  Displays the device's routing table.

  Helps diagnose whether traffic is being sent to the VPN tunnel instead of the correct external server.

  Incorrect Options:

  Option A nslookup: Used for resolving domain names to IPs (DNS troubleshooting), but this issue is likely routing-related.

  Option B tcpdump: Captures packets for deep packet analysis, not typically the first step in diagnosing a VPN-related access issue.

  Option C arp: Used for resolving local network MAC addresses, not relevant for external VPN issues.

  Option D dig: Like nslookup, used for DNS queries, but not useful for routing problems.

• Question 665:

  Which of the following technologies is most appropriate for a business that requires high-speed access to frequently used web content, such as images and videos?

  A. CDN
  B. SAN
  C. Firewall
  D. Switch
  A. CDN

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  Explanation

  The correct solution is a Content Delivery Network (CDN). A CDN caches web content (like images, videos, scripts) on distributed servers close to end users. This reduces latency, improves load times, and decreases the load on origin servers. For a business requiring high-speed access to media-rich content, a CDN is the most effective option.

  Option B: SAN (Storage Area Network) is used for storage in a data center, not for distributing web content.

  Option C: Firewall secures traffic but doesn't accelerate content delivery.

  Option D: Switches forward packets within a LAN, not globally distribute content.

  By leveraging CDNs, businesses can handle large traffic volumes efficiently while improving user experience.

  References:

  Domain: Network Infrastructure -- CDNs, caching, performance optimization.

• Question 666:

  A network technician wants to identify which DNS servers a computer is configured to use.

  Which of the following commands should the technician use?

  A. nbtstat
  B. arp
  C. nslookup
  D. netstat
  C. nslookup

• Question 667:

  Which connector is commonly used with SFP transceivers?

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

• Question 668:

  An unauthorized individual follows an employee through a secured door without permission.

  Which of the following attacks is occurring?

  A. Tailgating
  B. Piggybacking
  C. Phishing
  D. Shoulder surfing
  A. Tailgating

• Question 669:

  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

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  Explanation

  The size of a rack for installation depends on several factors, such as the available space, the power and cooling requirements, and the dimensions of the equipment to be installed. Two of the most important dimensions to consider are the switch depth and the server height. Switch depth refers to the length of the switch from front to back, which determines how much space is needed inside the rack. Server height refers to the vertical space occupied by the server, which is measured in rack units (RU) or U. One rack unit is equal to 1.75 inches. The height of the rack should be able to accommodate the total number of rack units needed for the servers and other devices, as well as some extra space for cable management and airflow.

  References:

  CompTIA Network+ N10-008 Cert Guide, Chapter 2, Section 2.5

• Question 670:

  Following a fire in a data center, the cabling was replaced. Soon after, an administrator notices network issues.

  Which of the following are the most likely causes of the network issues? (Select two).

  A. The switches are not the correct voltage.
  B. The HVAC system was not verified as fully functional after the fire.
  C. The VLAN database was not deleted before the equipment was brought back online.
  D. The RJ45 cables were replaced with unshielded cables.
  E. The wrong transceiver type was used for the new termination.
  F. The new RJ45 cables are a higher category than the old ones.
  D. The RJ45 cables were replaced with unshielded cables.
  E. The wrong transceiver type was used for the new termination.

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  Explanation

  Unshielded cables (D) are more prone to interference and may not be suitable for certain environments, especially after a fire where interference could be heightened.

  Using the wrong transceiver (E) for new terminations can lead to compatibility issues, causing network failures.