CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 621:

  An administrator needs to connect two laptops directly to each other using 802.11ac but does not have an AP available. Which of the following describes this configuration?

  A. Basic service set

  B. Extended service set

  C. Independent basic service set

  D. MU-MIMO

  Correct Answer: C

  Independent basic service set (IBSS) is a wireless network configuration in which two or more wireless devices connect directly to each other without the use of an access point. This is also sometimes referred to as an ad-hoc network. This configuration would meet the administrator's requirements of connecting two laptops directly to each other using 802.11ac without the use of an AP.

• Question 622:

  An engineer needs to restrict the database servers that are in the same subnet from communicating with each other. The database servers will still need to communicate with the application servers in a different subnet. In some cases, the database servers will be clustered, and the servers will need to communicate with other cluster members. Which of the following technologies will be BEST to use to implement this filtering without creating rules?

  A. Private VLANs

  B. Access control lists

  C. Firewalls

  D. Control plane policing

  Correct Answer: A

  "Use private VLANs: Also known as port isolation, creating a private VLAN is a method of restricting switch ports (now called private ports) so that they can communicate only with a particular uplink. The private VLAN usually has numerous private ports and only one uplink, which is usually connected to a router, or firewall."

• Question 623:

  The following DHCP scope was configured for a new VLAN dedicated to a large deployment of 325 loT sensors:

  

  The first 244 loT sensors were able to connect to the TFTP server, download the configuration file, and register to an loT management system. The other sensors are being shown as offline. Which of the following should be performed to determine the MOST likely cause of the partial deployment of the sensors?

  A. Check the gateway connectivity to the TFTP server.

  B. Check the DHCP network scope.

  C. Check whether the NTP server is online.

  D. Check the loT devices for a hardware failure.

  Correct Answer: B

  Since the CIDR is /24, there are 256 available IPs. The first IP would be for the gateway, and the last IP for the broadcast address, leaving you with 254 available IPs. Since the exclusion range is from 10.10.0.1 - 10, remove 10 available IPs and you're left with 244.

• Question 624:

  Which of the following bandwidth management techniques uses buffers al the client side to prevent TCP retransmissions from occurring when the ISP starts to drop packets of specific types that exceed the agreed traffic rate?

  A. Traffic shaping

  B. Traffic policing

  C. Traffic marking

  D. Traffic prioritization

  Correct Answer: A

  Traffic shaping is a bandwidth management technique that allows the administrator to control the flow of traffic from the network to the client. The technique uses buffers at the client side to prevent TCP retransmissions from occurring when the ISP starts to drop packets of specific types that exceed the agreed traffic rate. Traffic shaping enables the administrator to prioritize traffic types and specify the maximum bandwidth that each traffic type can consume.

• Question 625:

  An engineer recently decided to upgrade the firmware on a router. During the upgrade, the help desk received calls about a network outage, and a critical ticket was opened. The network manager would like to create a policy to prevent this from happening in the future. Which of the following documents should the manager create?

  A. Change management

  B. incident response

  C. Standard operating procedure

  D. System life cycle

  Correct Answer: A

  The network manager would like to prevent a similar network outage from occurring in the future, which indicates a need for preventive measures. The incident has already occurred, so an incident response plan may not be sufficient on its own to prevent future incidents. A system life cycle document outlines the various stages of a system's development, and while it may include a section on upgrades, it may not provide specific guidance on how to prevent network outages during upgrades.

  Change management. Change management policies outline procedures for making changes to IT infrastructure, such as upgrades, to minimize disruptions and ensure that changes are implemented in a controlled and consistent manner. By creating a change management policy, the network manager can establish procedures for upgrading firmware and other changes, which can help prevent network outages and minimize their impact on users.

• Question 626:

  A technician is troubleshooting a connectivity issue with an end user. The end user can access local network shares and intranet pages but is unable to access the internet or remote resources. Which of the following needs to be reconfigured?

  A. The IP address

  B. The subnet mask

  C. The gateway address

  D. The DNS servers

  Correct Answer: C

  In this scenario, the end user can access local network resources (local network shares and intranet pages) but cannot access the internet or remote resources. This indicates that the issue lies in the communication between the local network and external networks (the internet and remote resources).

  The gateway address is responsible for routing traffic between different networks. If the gateway address is misconfigured or not set correctly, it can prevent the user's device from accessing external networks. Local network resources are accessible because they are within the same network, but external resources require the gateway to be properly configured to route traffic beyond the local network.

  Therefore, the most likely cause of the issue is a misconfigured gateway address, and it needs to be reconfigured to point to the correct gateway/router for accessing external networks.

• Question 627:

  Users within a corporate network need to connect to the Internet, but corporate network policy does not allow direct connections. Which of the following is MOST likely to be used?

  A. Proxy server

  B. VPN client

  C. Bridge

  D. VLAN

  Correct Answer: A

• Question 628:

  A network engineer needs to pass both data and telephony on an access port. Which or the following features should be configured to meet this requirement?

  A. VLAN

  B. VoIP

  C. VIP

  D. VRRP

  Correct Answer: A

• Question 629:

  A technician is trying to install a VoIP phone, but the phone is not turning on. The technician checks the cable going from the phone to the switch, and the cable is good. Which of the following actions is needed for this phone to work?

  A. Add a POE injector

  B. Enable MDIX.

  C. Use a crossover cable.

  D. Reconfigure the port.

  Correct Answer: A

  VoIP phones require power to operate, and they can either be powered through an AC adapter or through Power over Ethernet (PoE). If the switch is not providing PoE, a PoE injector can be used to inject power into the Ethernet cable, allowing the phone to turn on.

• Question 630:

  A company is deploying a SAN at headquarters and a branch office 1, 000ml (1,609km) away that w? access small amounts of data. Which of the following types of connections would be MOST cost effective to implement?

  A. ISCSI

  B. FCoE

  C. Ethernet

  D. FC

  Correct Answer: A

  iSCSI (Internet Small Computer System Interface) is a cost-effective way to connect to a SAN over a long distance. It uses standard Ethernet networks and TCP/IP protocol to transmit SCSI commands, allowing it to run over existing IP networks. This makes it less expensive to implement than Fibre Channel (FC) or Fibre Channel over Ethernet (FCoE) which require specialized cabling and equipment. Additionally, iSCSI can be used to connect to both local and remote storage devices, making it a suitable option for the branch office scenario you described.