CompTIA N10-008 Practice Test - Questions Answers

Reverse Address Resolution Protocol (RARP) is a protocol that allows a device to obtain its MAC address from its IP address. A MAC spoofing attack is an attack where a device pretends to have a different MAC address than its actual one. RARP can be used to detect a MAC spoofing attack by comparing the MAC address obtained from RARP with the MAC address obtained from other sources, such as ARP or DHCP. Reference: https://partners.comptia.org/docs/default- source/resources/comptia-network-n10-008-exam-objectives-(2-0), https://www.techopedia.com/definition/25597/reverse-address-resolution-protocol-rarp

A spectrum analyzer is a tool that measures the frequency and amplitude of signals in a wireless network. It can be used to troubleshoot issues related to interference from other networks and non- 802.11 devices, such as microwave ovens or cordless phones, by identifying the sources and levels of interference in the wireless spectrum. A spectrum analyzer can also help to optimize the channel selection and placement of wireless access points. Reference:

https://partners.comptia.org/docs/default-source/resources/comptia-network-n10-008-exam- objectives-(2-0), https://www.flukenetworks.com/blog/cabling-chronicles/what-spectrum-analyzer- and-how-do-you-use-it

A captive portal is a web page that requires users to authenticate before they can access the internet. If the session time-out configuration is too short, users may experience intermittent internet connectivity and have to reconnect using the web authentication process each time. The network administrator can verify the session time-out configuration on the captive portal settings and adjust it if needed. Reference: CompTIA Network+ Certification Exam Objectives Version 2.0 (Exam Number: N10-006), Domain 1.0 Network Architecture, Objective 1.8 Explain the purposes and use cases for advanced networking devices.

Tailgating is a physical security attack where an unauthorized person follows an authorized person into a restricted area without proper identification or authorization. The network administrator prevented this attack by stopping and directing the person to the security desk. Reference: CompTIA Network+ Certification Exam Objectives Version 2.0 (Exam Number: N10-006), Domain 3.0 Network Security, Objective 3.1 Compare and contrast risk-related concepts.

CRC errors are cyclic redundancy check errors that occur when data is corrupted during transmission. CRC errors are usually caused by physical layer issues such as faulty cables, connectors, ports, or interference. The network administrator will most likely start to troubleshoot at layer 1 of the OSI model, which is the physical layer that deals with the transmission of bits over a medium. Reference:

CompTIA Network+ Certification Exam Objectives Version 2.0 (Exam Number: N10-006), Domain 4.0 Network Troubleshooting and Tools, Objective 4.1 Given a scenario, implement network troubleshooting methodology.

The question asks about the metrics that will most accurately show the underlying performanceissues of slow or unresponsive desktops for users who are using VMs (virtual machines).VMs are software-based simulations of physical computers that run on a host system. Theyshare the resources of the host system, such as CPU, memory, disk space, etc.If the host system does not have enough resources to support the number of VMs running on it,the performance of the VMs will suffer. This is especially true if the VMs are running resource-intensive applications or tasks.Therefore, the metrics that will most accurately show the underlying performance issuesareCPU usageandmemory. These metrics indicate how much of the host system's resources arebeing consumed by the VMs and how much is available for other processes.The other metrics are not relevant to the question, as they are related to the networkperformance, not the host system performance. They are:Temperature: the measure of how hot the host system or its components are. Hightemperature can cause overheating and damage to the hardware, but it is not directly relatedto the performance of the VMs.Bandwidth: the measure of how much data can be transferred over a network connection in agiven time. Low bandwidth can cause network congestion and slow data transfer, but it is notdirectly related to the performance of the VMs.Latency: the measure of how long it takes for a data packet to travel from one point to anotheron a network. High latency can cause delays and poor quality of service, but it is not directlyrelated to the performance of the VMs.Jitter: the measure of how much the latency varies over time on a network. High jitter cancause inconsistent and unpredictable network performance, but it is not directly related to theperformance of the VMs.

CompTIA Network+ N10-008 Study Guide, Chapter 1: Networking Concepts, Section 1.3:Virtualization and Network Storage Technologies, Pages 34-36Professor Messer's CompTIA N10-008 Network+ Course, Video 1.3: Virtualization and NetworkStorage Technologies, Part 1

To resolve the issue of DHCP scope exhaustion without creating a new DHCP pool, the administrator can reduce the lease time. By decreasing the lease time, the IP addresses assigned by DHCP will be released back to the DHCP scope more quickly, allowing them to be assigned to new devices.

Reference:

CompTIA Network+ Certification Study Guide, Exam N10-007, Fourth Edition, Chapter 2: The OSI Model and Networking Protocols, Objective 2.3: Given a scenario, implement and configure the appropriate addressing schema.

https://www.networkcomputing.com/data-centers/10-tips-optimizing-dhcp-performance

Short The switch feature that is most likely to be used to assist with logging IPv6 and MAC addresses of devices on a network segment is Neighbor Discovery Protocol (NDP). NDP is used by IPv6 to discover and maintain information about other nodes on the network, including their IPv6 and MAC addresses. By periodically querying NDP, the administrator can log this information for auditing purposes.

Reference:

CompTIA Network+ Certification Study Guide, Exam N10-007, Fourth Edition, Chapter 2: The OSI Model and Networking Protocols, Objective 2.1: Compare and contrast TCP and UDP ports, protocols, and their purposes.

The DNS record that works as an alias to another record is called CNAME (Canonical Name). CNAME records are used to create an alias for a domain name that points to another domain name.

Reference:

CompTIA Network+ Certification Study Guide, Exam N10-007, Fourth Edition, Chapter 2: The OSI Model and Networking Protocols, Objective 2.3: Given a scenario, implement and configure the appropriate addressing schema.