CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 491:

  A user reports that a crucial fileshare is unreachable following a network upgrade that was completed the night before. A network technician confirms the problem exists. Which of the following troubleshooting steps should the network technician perform NEXT?

  A. Establish a theory of probable cause.

  B. Implement a solution to fix the problem.

  C. Create a plan of action to resolve the problem.

  D. Document the problem and the solution.

  Correct Answer: A

  Establishing a theory of probable cause is the third step in the general troubleshooting process, after identifying the problem and gathering information. Establishing a theory of probable cause involves using the information gathered to formulate one or more possible explanations for the problem and testing them to verify or eliminate them. In this scenario, the network technician has confirmed the problem exists and should proceed to establish a theory of probable cause based on the information available, such as the network upgrade that was completed the night before. Implementing a solution to fix the problem is the fifth step in the general troubleshooting process, after establishing a plan of action. Implementing a solution involves applying the chosen method or technique to resolve the problem and verifying its effectiveness. In this scenario, the network technician has not established a plan of action yet and should not implement a solution without knowing the cause of the problem. Creating a plan of action to resolve the problem is the fourth step in the general troubleshooting process, after establishing a theory of probable cause. Creating a plan of action involves selecting the best method or technique to address the problem based on the available resources, constraints, and risks. In this scenario, the network technician has not established a theory of probable cause yet and should not create a plan of action without knowing the cause of the problem. Documenting the problem and the solution is the seventh and final step in the general troubleshooting process, after implementing preventive measures. Documenting the problem and the solution involves recording the details of the problem, its symptoms, its cause, its solution, and its preventive measures for future reference and improvement. In this scenario, the network technician has not implemented preventive measures yet and should not document the problem and the solution without resolving and preventing it.

• Question 492:

  Which of the following protocols can be routed?

  A. FCoE

  B. Fibre Channel

  C. iSCSI

  D. NetBEUI

  Correct Answer: C

• Question 493:

  A Fortune 500 company would like to move its on-premises corporate email systems to a multitenant product hosted in the cloud where no maintenance of the underlying server OS or platform is required. Which of the following BEST represents the model the company should choose?

  A. Public

  B. Private

  C. Hybrid

  D. Community

  Correct Answer: A

  The model that the company should choose to move its on-premises corporate email systems to a multitenant product hosted in the cloud where no maintenance of the underlying server OS or platform is required is the Public cloud model. The public cloud is a type of cloud computing where cloud-based services and resources are provided over the internet to anyone who wants to use or purchase them. In this model, the resources are owned, managed, and maintained by a third-party cloud provider, who is responsible for the infrastructure, underlying server OS, and platform maintenance, leaving the customer free to focus on their application or service. This option provides the greatest degree of scalability, flexibility, and cost-effectiveness while reducing management overhead.

• Question 494:

  Which of the following situations would require an engineer to configure subinterfaces?

  A. In a router-on-a-stick deployment with multiple VLANs

  B. In order to enable inter-VLAN routing on a multilayer switch

  C. When configuring VLAN trunk links between switches

  D. After connecting a router that does not support 802.1Q VLAN tags

  Correct Answer: A

  A router-on-a-stick is a configuration that allows a single router interface to route traffic between multiple VLANs on a network1. A router-on-a-stick requires sub-interfaces to be configured on the router interface, one for each VLAN. Each sub- interface is assigned a VLAN ID and an IP address that belongs to the corresponding VLAN subnet. The router interface is connected to a switch port that is configured as a trunk port, which allows traffic from multiple VLANs to pass through. The router then performs inter-VLAN routing by forwarding packets between the sub-interfaces based on their destination IP addresses. Inter-VLAN routing is a process that allows devices on different VLANs to communicate with each other. Inter-VLAN routing can be performed by a router-on-a-stick configuration, as explained above, or by a multilayer switch that has routing capabilities. A multilayer switch does not require sub-interfaces to be configured for inter-VLAN routing; instead, it uses switch virtual interfaces (SVIs) that are associated with each VLAN. An SVI is a logical interface that represents a VLAN on a switch and has an IP address that belongs to the VLAN subnet. The switch then performs inter- VLAN routing by forwarding packets between the SVIs based on their destination IP addresses. VLAN trunking is a method that allows traffic from multiple VLANs to be carried over a single link between switches or routers. VLAN trunking requires the use of a tagging protocol, such as 802.1Q, that adds a header to each frame that identifies its VLAN ID. VLAN trunking does not require sub-interfaces to be configured on the switches or routers; instead, it uses trunk ports that are configured to allow or deny traffic from specific VLANs. The switches or routers then forward packets between the trunk ports based on their VLAN IDs. 802.1Q is a standard that defines how VLAN tagging and trunking are performed on Ethernet networks. 802.1Q adds a 4-byte header to each frame that contains a 12-bit field for the VLAN ID and a 3-bit field for the priority level. 802.1Q does not require sub- interfaces to be configured on the switches or routers; instead, it uses trunk ports that are configured to support 802.1Q tagging and untagging. The switches or routers then forward packets between the trunk ports based on their VLAN IDs and priority levels.

• Question 495:

  At which of the following OSI model layers does a MAC filter list for a wireless infrastructure operate?

  A. Physical

  B. Network

  C. Session

  D. Data link

  Correct Answer: D

  A MAC filter list is a security feature that allows or denies access to a wireless network based on the MAC address of the device. A MAC address is a unique identifier assigned to a network interface card (NIC) at the physical layer of the OSI model. However, MAC filtering operates at the data link layer of the OSI model, where MAC addresses are used to encapsulate and deliver data frames between devices on the same network segment. References: CompTIA Network+ Certification Exam Objectives Version 7.0 (N10-007), Objective 3.1: Given a scenario, install and configure wireless LAN infrastructure and implement the appropriate technologies in support of wireless capable devices.

• Question 496:

  The Chief Executive Officer of a company wants to ensure business operations are not disrupted in the event of a disaster. The solution must have fully redundant equipment, real-time synchronization, and zero data loss. Which of the following should be prepared?

  A. Cloud site

  B. Warm site

  C. Hot site

  D. Cold site

  Correct Answer: C

  Hot site is the most appropriate solution for the CEO's requirements. A hot site is a fully redundant data center that has all the necessary hardware, software, and data to support a company's critical business functions in the event of a disaster. The hot site is typically located in a different geographic location than the primary site to ensure business continuity in case of a natural disaster or other disruptive event. The hot site is continuously operational and has real-time data synchronization to ensure zero data loss.

  A cloud site may be a viable solution as well, as it provides automatic replication and redundancy of data and services across multiple geographic locations. However, the CEO's requirement for fully redundant equipment may not be met with a cloud site.

  A warm site is a partially configured and equipped data center that requires some setup time to become operational, so it is not an appropriate solution for zero data loss requirements.

  A cold site is a completely empty data center that requires significant setup time to become operational, making it an unsuitable solution for a CEO who wants to ensure that business operations are not disrupted.

• Question 497:

  A company wants to mitigate unauthorized physical connectivity after implementing a hybrid work schedule. Which of the following will the company MOST likely configure?

  A. Intrusion prevention system

  B. DHCP snooping

  C. ARP inspection

  D. Port security

  Correct Answer: D

  Port security is a feature that allows network administrators to control which devices can connect to specific switch ports. By configuring port security, the company can limit the number of authorized devices that can be connected to each switch port, preventing unauthorized physical connectivity.

• Question 498:

  An IT technician needs to increase bandwidth to a server. The server has multiple gigabit ports. Which of the following can be used to accomplish this without replacing hardware?

  A. STP

  B. 802.1Q

  C. Duplex

  D. LACP

  Correct Answer: D

  LACP stands for Link Aggregation Control Protocol and is a protocol that allows multiple physical ports to be combined into a single logical port. This can increase bandwidth, redundancy, and load balancing for a server. LACP is part of the IEEE 802.3ad standard for link aggregation. STP stands for Spanning Tree Protocol and is a protocol that prevents loops in a network by blocking redundant links. 802.1Q is a standard for VLAN (Virtual Local Area Network) tagging, which allows multiple logical networks to share the same physical infrastructure. Duplex is a mode of communication that determines how data is transmitted and received on a link. Full duplex allows simultaneous transmission and reception, while half duplex allows only one direction at a time. References: CompTIA Network+ Certification Exam Objectives Version 7.0 (N10-007), Objective 1.5: Compare and contrast network cabling types, standards and speeds.

• Question 499:

  A help desk technician is troubleshooting a Windows server named SQL.local and wants to check which port a specific application is running on. Which of the following commands should the technician run?

  A. dig

  B. traceroute

  C. arp

  D. netstat

  Correct Answer: D

  Netstat is a command-line tool that displays active network connections and listening ports on a host. By running the netstat command with appropriate parameters on the Windows server (SQL.local), the technician can view the list of active connections and the associated ports. This will help identify the port on which the specific application is running.

• Question 500:

  Which of the following describes a network in which users and devices need to mutually authenticate before any network resource can be accessed?

  A. Least privilege

  B. Local authentication

  C. Zero trust

  D. Need to know

  Correct Answer: C