CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 541:

  A technician monitors a switch interface and notices it is not forwarding frames on a trunked port. However, the cable and interfaces are in working order. Which of the following is MOST likely the cause of the issue?

  A. STP policy

  B. Flow control

  C. 802.1Q configuration

  D. Frame size

  Correct Answer: C

• Question 542:

  A wireless network technician is receiving reports from some users who are unable to see both of the corporate SSIDs on their mobile devices. A site survey was recently commissioned, and the results verified acceptable RSSI from both APs in all user areas. The APs support modern wireless standards and are all broadcasting their SSIDs. The following table shows some of the current AP settings:

  

  Which of the following changes would result in all of the user devices being capable of seeing both corporate SSIDs?

  A. Implementing the WPA2 Enterprise authentication standard

  B. Implementing omnidirectional antennas for both APs

  C. Configuring the highest power settings for both APs

  D. Configuring both APs to use the 802.11ac wireless standard

  Correct Answer: B

• Question 543:

  A network administrator is implementing process changes based on recommendations following a recent penetration test. The testers used a method to gain access to the network that involved exploiting a publicly available and fixed remote code execution vulnerability in the VPN appliance. Which of the following should the administrator do to BEST prevent this from happening again?

  A. Change default passwords on internet-facing hardware.

  B. Implement robust ACLs with explicit deny-all entries.

  C. Create private VLANs for management plane traffic.

  D. Routinely upgrade all network equipment firmware.

  Correct Answer: D

  Firmware is the software that runs on network equipment such as routers, switches, and VPN appliances. Firmware updates often contain bug fixes, security patches, and performance improvements that can prevent or mitigate vulnerabilities and attacks. By routinely upgrading all network equipment firmware, a network administrator can ensure that the network devices are running the latest and most secure versions of firmware and avoid exploiting known and fixed remote code execution vulnerabilities in the VPN appliance.

  References: https://www.comptia.org/training/books/network-n10-008-study-guide (page 462)

• Question 544:

  A public, wireless ISP mounts its access points on top of traffic signal poles. Fiber-optic cables are installed from a fiber switch through the ground and up the pole to a fiber-copper media converter, and then connected to the AP. In one location, the switchport is showing sporadic link loss to the attached AP. A similar link loss is not seen at the AP interface. The fiber-optic cable is moved to another unused switchport with a similar result.

  Which of the following steps should the assigned technician complete NEXT?

  A. Disable and enable the switchport.

  B. Clean the fiber-optic cable ends.

  C. Replace the media converter.

  D. Replace the copper patch cord.

  Correct Answer: B

  Fiber-optic cables are cables that use light signals to transmit data over long distances at high speeds. Fiber-optic cables are sensitive to dirt, dust, moisture, or other contaminants that can interfere with the light signals and cause link loss or signal degradation. To troubleshoot link loss issues with fiber-optic cables, one of the steps that should be completed next is to clean the fiber-optic cable ends with a lint-free cloth or a specialized cleaning tool. Cleaning the fiber-optic cable ends can remove any dirt or debris that may be blocking or reflecting the light signals and restore the link quality.

• Question 545:

  An engineer was asked to update an MX record for an upcoming project. Which of the following server types is MOST likely to be in scope for the project?

  A. Email

  B. Web

  C. File

  D. Database

  Correct Answer: A

  An MX record is a type of DNS record that specifies the mail server responsible for accepting email messages on behalf of a domain name. Therefore, an engineer who needs to update an MX record is most likely working on an email server project

• Question 546:

  Which of the following would be BEST suited for use at the access layer in a three-tier architecture system?

  A. Router

  B. Multilayer switch

  C. Layer 2 switch

  D. Access point

  Correct Answer: C

  A layer 2 switch is a device that forwards traffic based on MAC addresses within a single network segment or VLAN. A layer 2 switch is best suited for use at the access layer in a three-tier architecture system. The access layer is the layer that connects end devices such as computers, printers, and phones to the network. A layer 2 switch can provide fast and efficient switching for end devices without adding complexity or overhead to the network.

  References: https://www.comptia.org/training/books/network-n10-008-study-guide (page 139)

• Question 547:

  Which of the following protocols uses Dijkstra's algorithm to calculate the LOWEST cost between routers?

  A. RIP

  B. OSPF

  C. BGP

  D. EIGRP

  Correct Answer: B

  OSPF stands for Open Shortest Path First and is a link-state routing protocol that uses Dijkstra's algorithm to calculate the lowest cost between routers. OSPF assigns a cost value to each link based on factors such as bandwidth, delay, or

  reliability, and builds a map of the network topology. OSPF then uses Dijkstra's algorithm to find the shortest path from each router to every other router in the network1. RIP stands for Routing Information Protocol and is a distance-vector

  routing protocol that uses hop count as the metric to find the best path. BGP stands for Border Gateway Protocol and is a path-vector routing protocol that uses attributes such as AS path, local preference, or origin to select the best route.

  EIGRP stands for Enhanced Interior Gateway Routing Protocol and is a hybrid routing protocol that uses a composite metric based on bandwidth, delay, load, and reliability.

  References: Dijkstra's algorithm - Wikipedia (https://en.wikipedia.org/wiki/Dijkstra%27s_algorithm)

• Question 548:

  A network technician needs to select an AP that will support at least 1.3Gbps and 5GHz only. Which of the following wireless standards must the AP support to meet the requirements?

  A. B

  B. AC

  C. AX

  D. N

  E. G

  Correct Answer: B

  Wireless AC is a wireless standard that supports up to 1.3Gbps data rate and operates in the 5GHz frequency band only. Wireless AC is also backward compatible with wireless A and N devices that use the 5GHz band. Wireless AC is suitable for high-performance applications such as HD video streaming and online gaming. References: Network+ Study Guide Objective 2.2: Explain the purposes and properties of routing and switching. Subobjective: Wireless standards and their characteristics.

• Question 549:

  A network administrator requires redundant routers on the network, but only one default gateway is configurable on a workstation. Which of the following will allow for redundant routers with a single IP address?

  A. EIGRP

  B. VRRP

  C. MPLS

  D. STP

  Correct Answer: B

  Virtual Router Redundancy Protocol (VRRP) is a protocol that allows for redundant routers on the network with a single IP address. VRRP works by creating a virtual router that consists of one master router and one or more backup routers.

  The virtual router has its own IP address and MAC address that are shared among the routers in the group. The master router responds to traffic sent to the virtual router's IP address, while the backup routers monitor the master router's

  status. If the master router fails, one of the backup routers takes over as the new master router and continues to respond to traffic. This way, VRRP provides high availability and fault tolerance for the network.

  References: https://www.comptia.org/training/books/network-n10-008-study-guide (page 230)

• Question 550:

  A customer needs to distribute Ethernet to multiple computers in an office. The customer would like to use non-proprietary standards. Which of the following blocks does the technician need to install?

  A. 110

  B. 66

  C. Bix

  D. Krone

  Correct Answer: A

  A 110 block is a type of punch-down block that is used to distribute Ethernet to multiple computers in an office. A punch-down block is a device that connects one group of wires to another group of wires by using a special tool that pushes the wires into slots on the block. A 110 block is a non-proprietary standard that supports up to Category 6 cabling and can be used for voice or data applications.

  References: https://www.comptia.org/training/books/network-n10-008-study-guide (page 64)