N10-008 Exam Dumps - CompTIA Network+ Questions and 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. References: 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

Hub-and-spoke is the network topology that best describes a central device connected to multiple independent devices. A network topology is the physical or logical arrangement of devices and links on a network. A hub-and-spoke topology is a type of star topology, where a central device, such as a switch or a router, acts as a hub that connects to multiple devices, such as computers or printers, that act as spokes. A hub-and-spoke topology can offer advantages such as simplicity, scalability, and reliability, but also disadvantages such as single point of failure, high dependency on the hub, and increased latency. References: [CompTIA Network+ Certification Exam Objectives], Hub-and-Spoke Topology: What Is It? (Diagram Included) | SolarWinds MSP

A 110 block is a type of punch-down block that is used to terminate twisted-pair cables in Ethernet networks. It is a non-proprietary standard that is widely used in structured cabling systems for voice and data applications. A 110 block can support up to 100 MHz of bandwidth and can be used with Cat 3, Cat 5, Cat 5e, and Cat 6 cables12.

A 66 block is another type of punch-down block that is mainly used for telephone wiring. It is an older and less reliable standard than the 110 block and does not support high-speed data transmission3. A BiX block is a proprietary punch-down block that is developed by NORDX/CDT and is mostly used in Canada. It can support up to 250 MHz of bandwidth and can be used with Cat 5e and Cat 6 cables4. A Krone block is another proprietary punch-down block that is developed by ADC Krone and is mostly used in Europe. It can support up to 100 MHz of bandwidth and can be used with Cat 5 and Cat 5e cables.

Therefore, the best option for the customer who wants to use non-proprietary standards is the 110 block.

SSL is a widely used protocol for establishing secure, encrypted connections between devices over the Internet. It is typically used to secure communication between web browsers and servers, and can be easily enabled on a server by installing an SSL certificate.

Traps are unsolicited messages sent by network devices to a network management system (NMS) when an event or a change in status occurs. Traps can help notify the network management team of any issues or problems on the network, such as a link failure or a device reboot. Traps can also trigger actions or alerts on the NMS, such as sending an email or logging the event. MIB stands for Management Information Base and is a database of information that can be accessed and managed by an NMS using SNMP (Simple Network Management Protocol). OID stands for Object Identifier and is a unique name that identifies a specific variable in the MIB. Baselines are measurements of normal network performance and behavior that can be used for comparison and analysis.

References: CompTIA Network+ Certification Exam Objectives Version 7.0 (N10-007), Objective 2.5: Given a scenario, use remote access methods.

The most appropriate shortened version of the IPv6 address ef82:0000:00O0:000O:0O00:1ab1:1234:1bc2 is ef82::1ab1:1234:1bc2. IPv6 addresses are 128-bit hexadecimal values that are divided into eight groups of 16 bits each, separated by colons. IPv6 addresses can be shortened by using two rules: omitting leading zeros within each group, and replacing one or more consecutive groups of zeros with a double colon (::). Only one double colon can be used in an address. Applying these rules to the given address results in ef82::1ab1:1234:1bc2. References: CompTIA Network+ N10-008 Certification Study Guide, page 114; The Official CompTIA Network+ Student Guide (Exam N10-008), page 5-7.

The issue with an application’s instructions being properly translated for network components is most likely at the Application layer. Here’s why:

• Infrastructure layer: This layer deals with physical components (e.g., switches, routers) and is unlikely to cause translation issues.
• Session layer: Responsible for establishing, maintaining, and terminating communication sessions but not directly related to application instructions.
• Control layer: Not a standard OSI layer; it’s likely a misnomer.
• Application layer: This layer handles application-specific protocols and data. Translation issues often occur here.

Therefore, the correct answer is D. Application laye

• Channel overlap occurs when two or more wireless access points (APs) use the same or adjacent frequency channels within the same area12. This can cause interference and degradation of the wireless signal quality, resulting in increased latency and packet drops for the Wi-Fi-connected devices12.
• Channel overlap is one of the most common causes of Wi-Fi performance issues, especially in densely populated areas where there are many wireless networks operating in the same spectrum12. The 2.4 GHz band, which is widely used by Wi-Fi devices, has only three non-overlapping channels (1, 6, and 11) in most regions, making it more prone to channel overlap than the 5 GHz band, which has more non-overlapping channels available12.
• To fix channel overlap, network administrators should perform a site survey to identify the existing wireless networks and their channel usage, and then configure their APs to use the least congested or non-overlapping channels12. Alternatively, they can use APs that support automatic channel selection, which can dynamically adjust the channel based on the network conditions12.
• The other options are not the most likely reasons for the issue. Distance from the AP can affect the signal strength and quality, but it does not explain why the issue occurred only after the new company moved in3. Bandwidth latency is a measure of the delay in data transmission, which can be affected by various factors such as network congestion, routing, or quality of service, but it is not a cause of the issue itself4. RF attenuation is the loss of signal power due to distance, obstacles, or interference, which can also affect the Wi-Fi performance, but it is not specific to the scenario described in the question5. Network congestion is the state of high demand and low availability of network resources, which can cause latency and packet loss, but it is not necessarily related to channel overlap6. References:
• 1: CompTIA Network+ N10-008 Certification Study Guide, Chapter 4: Wireless Networks, Section 4.4: Wireless Network Troubleshooting7
• 2: Professor Messer’s CompTIA N10-008 Network+ Course Notes, Page 25: Wireless Troubleshooting8
• 3: CompTIA Network+ N10-008 Certification Study Guide, Chapter 4: Wireless Networks, Section 4.2: Wireless Network Implementations7
• 4: CompTIA Network+ N10-008 Certification Study Guide, Chapter 2: Network Protocols and Services, Section 2.5: Bandwidth and Latency7
• 5: CompTIA Network+ N10-008 Certification Study Guide, Chapter 4: Wireless Networks, Section 4.1: Wireless Network Fundamentals7
• 6: CompTIA Network+ N10-008 Certification Study Guide, Chapter 3: Routing, Section 3.5: Network Congestion7
• 7: CompTIA Network+ N10-008 Certification Study Guide2
• 8: Professor Messer’s CompTIA Network+ N10-008 Training Course5

• A basic service set (BSS) is a group of wireless devices that share the same service set identifier (SSID) and communicate with each other through a single access point (AP). A BSS is also known as an infrastructure mode network1.
• An extended service set (ESS) is a group of two or more BSSs that are connected by a distribution system (DS), such as a switch or a router. An ESS allows wireless devices to roam between different APs and maintain network connectivity. An ESS is also known as a wireless LAN (WLAN)2.
• An independent basic service set (IBSS) is a group of wireless devices that communicate with each other directly without using an AP or a DS. An IBSS is also known as an ad hoc network or a peer-to-peer network3.
• MU-MIMO (Multi-User Multiple-Input Multiple-Output) is a technology that allows an AP to transmit data to multiple wireless devices simultaneously using multiple antennas and spatial streams. MU-MIMO can improve the network efficiency and performance by reducing the waiting time and increasing the throughput4.
• The scenario described in the question is an example of an IBSS, as the two laptops are connected directly to each other using 802.11ac without an AP. Therefore, the correct answer is C.

References:

• 1: BSS
• 2: ESS
• 3: IBSS
• 4: MU-MIMO

• The DHCP network scope defines the range of IP addresses that can be assigned to the devices on the network by the DHCP server.
• In this scenario, the DHCP scope is configured for 244 addresses, which is not enough for the 325 loT sensors that need to connect to the network.
• Therefore, the first 244 loT sensors were able to get an IP address from the DHCP server and connect to the TFTP server, while the remaining 81 sensors could not obtain an IP address and were shown as offline.
• To solve this problem, the network administrator should check the DHCP network scope and either increase the range of IP addresses or create a new scope for the additional loT sensors.
• Checking the gateway connectivity to the TFTP server, the NTP server status, or the loT devices for hardware failure are not relevant to this issue, as they would affect all the loT sensors, not just some of them. References:
• [CompTIA Network+ N10-008 Study Guide], Chapter 2: Network Devices and Technologies, Section 2.3: Configure and Support loT Devices, p. 84
• [Professor Messer’s CompTIA N10-008 Network+ Course Notes], Section 1.2: Network Topologies and Types, p. 8
• Network+ N10-008 Practice Test | CertBlaster, Question 1

(Note: Ips will be change on each simulation task, so we have given example answer for the understanding)

To troubleshoot all the network components and review the cable test results, you can use the following steps:

• Click on each device and cable to open its information window.
• Review the information and identify any problems or errors that may affect the network connectivity or performance.
• Diagnose the appropriate component(s) by identifying any components with a problem and recommend a solution to correct each problem.
• Fill in the remediation form using the drop-down menus provided.

Here is an example of how to fill in the remediation form for PC1:

• The component with a problem is PC1.
• The problem is Incorrect IP address.
• The solution is Change the IP address to 192.168.1.10.

You can use the same steps to fill in the remediation form for other components.

To enter commands in each device, you can use the following steps:

• Click on the device to open its terminal window.
• Enter the command ipconfig /all to display the IP configuration of the device, including its IP address, subnet mask, default gateway, and DNS servers.
• Enter the command ping  to test the connectivity and reachability to another device on the network by sending and receiving echo packets. Replace with the IP address of the destination device, such as 192.168.1.1 for Core Switch 1.
• Enter the command tracert  to trace the route and measure the latency of packets from the device to another device on the network by sending and receiving packets with increasing TTL values. Replace with the IP address of the destination device, such as 192.168.1.1 for Core Switch 1.

Here is an example of how to enter commands in PC1:

• Click on PC1 to open its terminal window.
• Enter the command ipconfig /all to display the IP configuration of PC1. You should see that PC1 has an incorrect IP address of 192.168.2.10, which belongs to VLAN 2 instead of VLAN 1.
• Enter the command ping 192.168.1.1 to test the connectivity to Core Switch 1. You should see that PC1 is unable to ping Core Switch 1 because they are on different subnets.
• Enter the command tracert 192.168.1.1 to trace the route to Core Switch 1. You should see that PC1 is unable to reach Core Switch 1 because there is no route between them.

You can use the same steps to enter commands in other devices, such as PC3, PC4, PC5, and Server 1.

According to the network troubleshooting methodology, the first step a network administrator should take is to identify the problem. This involves gathering information from the users, the network devices, and the symptoms of the issue. Identifying the problem helps to narrow down the scope and the possible causes of the network issue.

References

• 1: Network troubleshooting methodology | CompTIA Network+ N10-008 …
• 2: Chapter 21. A Network Troubleshooting Methodology - CompTIA Network+ …
• 3: Network Troubleshooting Methodology – N10-008 CompTIA Network+ : 5.1

When connecting two unmanaged switches together, the use of a straight-through Ethernet cable is typically incorrect unless the switches support auto-mdix (automatic medium-dependent interface crossover), which automatically adjusts the connection to allow for different types of cables. Older or more basic unmanaged switches often require a crossover cable when connecting similar devices (switch-to-switch or hub-to-hub) to ensure the transmit pins on one end match the receive pins on the other end. This allows data to flow correctly between the two devices. Since the uplinks are not on, it suggests that the correct pin alignment is not being achieved with the straight-through cable, and a crossover cable should be used instead​​.

802.11n is a wireless standard that supports data rates up to 600 Mbps and operates in both 2.4 GHz and 5 GHz frequency bands. 802.11n is backward compatible with 802.11g, which operates only in 2.4 GHz band. 802.11n is the least expensive solution that can upgrade the wireless infrastructure for the company, as it does not require replacing all the access points or wireless devices

MAN stands for Metropolitan Area Network, and it is a type of network that covers a large geographic area, such as a city or a county. MANs are often used to connect multiple LANs (Local Area Networks) within a region, such as schools, offices, or government buildings. MANs typically use high-speed and high-capacity transmission media, such as fiber-optic cables, to provide fast and reliable data communication. MANs can also provide access to WANs (Wide Area Networks), such as the Internet, or other services, such as cable TV or VoIP.

The other options are not correct because they are not the type of network that covers a large city. They are:

• LAN. LAN stands for Local Area Network, and it is a type of network that covers a small geographic area, such as a home, an office, or a building. LANs are often used to connect multiple devices, such as computers, printers, or phones, within a single network. LANs typically use low-cost and low-capacity transmission media, such as twisted-pair cables, to provide data communication. LANs can also provide access to other networks, such as MANs or WANs, through routers or gateways.
• CAN. CAN stands for Campus Area Network, and it is a type of network that covers a moderate geographic area, such as a university, a hospital, or a military base. CANs are often used to connect multiple LANs within a campus, such as different departments, buildings, or facilities. CANs typically use medium-cost and medium-capacity transmission media, such as coaxial cables, to provide data communication. CANs can also provide access to other networks, such as MANs or WANs, through routers or gateways.
• WAN. WAN stands for Wide Area Network, and it is a type of network that covers a very large geographic area, such as a country, a continent, or the world. WANs are often used to connect multiple MANs or LANs across different regions, such as different cities, states, or countries. WANs typically use high-cost and high-capacity transmission media, such as satellite links, to provide data communication. WANs can also provide access to various services, such as the Internet, email, or VPN.

References1: What is a Metropolitan Area Network (MAN)? - Definition from Techopedia2: Network+ (Plus) Certification | CompTIA IT Certifications3: What is a Local Area Network (LAN)? - Definition from Techopedia4: What is a Campus Area Network (CAN)? - Definition from Techopedia5: What is a Wide Area Network (WAN)? - Definition from Techopedia