N10-008 Exam Dumps - CompTIA Network+ Exam

• The end user can access local network shares and intranet pages, which means that the IP address and the subnet mask are configured correctly and the network interface is working properly.
• However, the end user is unable to access the internet or remote resources, which means that there is a problem with the name resolution or the routing of the traffic.
• The gateway address is responsible for routing the traffic to the destination network, which could be on the internet or another subnet. If the gateway address is incorrect, the end user would not be able to reach any network outside the local subnet.
• The DNS servers are responsible for resolving the domain names to the IP addresses, which are needed to communicate with the internet or remote resources. If the DNS servers are incorrect, the end user would not be able to resolve the names of the websites or servers they want to access.
• Therefore, the most likely cause of the connectivity issue is that the DNS servers need to be reconfigured with the correct addresses. References:
• CompTIA Network+ N10-008 Study Guide, Chapter 2: Network Protocols and Services, Section 2.2: TCP/IP Suite, p. 76-77
• Network+ N10-008 Practice Test, Question 359
• CompTIA Network+ (N10-008) Performance-based Questions (PBQs), Part 1, 1:36

High availability is a quality of a system or component that assures a high level of operational performance for a given period of time. High availability means that an IT system, component, or application can operate at a high level, continuously, without intervention, for a given time period. High-availability infrastructure is configured to deliver quality performance and handle different loads and failures with minimal or zero downtime. High availability is important for web-based applications, as it ensures that the application is always accessible to the end users, even in the event of a server or component failure. High availability can be achieved by eliminating single points of failure, implementing redundancy, load balancing, and failover mechanisms.

• CRC stands for cyclic redundancy check, which is a method of detecting errors in data transmission. CRC errors occur when the verification code calculated by the sender and the receiver do not match, indicating that some bits were corrupted during the transmission.
• CRC errors are usually caused by physical layer issues, such as noise, interference, or damaged cables. Therefore, option A is the most likely cause of these errors, as a bad wire on the Cat 5e cable can introduce noise or interference that corrupts the data bits.
• Option B is not a likely cause of CRC errors, as the wrong VLAN assignment to the switchport would affect the logical layer, not the physical layer. The wrong VLAN assignment would prevent the switch from forwarding the frames to the correct destination, but it would not cause errors in the data bits themselves.
• Option C is also not a likely cause of CRC errors, as a misconfigured QoS setting on the router would affect the network layer, not the physical layer. A misconfigured QoS setting would affect the priority or bandwidth allocation of the packets, but it would not cause errors in the data bits themselves.
• Option D is also not a likely cause of CRC errors, as both sides of the switch trunk set to full duplex would not introduce any errors in the data transmission. Full duplex means that both sides can send and receive data simultaneously, without causing collisions or interference. In fact, full duplex is the preferred mode for switch trunks, as it increases the bandwidth and efficiency of the link.

References:

• CompTIA Network+ N10-008 Study Guide, Chapter 2: Network Devices and Technologies, Section 2.2: Troubleshooting Common Network Problems, Page 941
• Professor Messer’s CompTIA N10-008 Network+ Course Notes, Section 2.2: Troubleshooting Common Network Problems, Page 162
• Solved: [How to resolve] CRC errors - Cisco Community3
• Troubleshooting CRC Error Packets on an Interface - Huawei4
• Resolving CRC and Input Errors, A Beginner’s Guide - site5

• 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

SLAAC (Stateless Address Autoconfiguration) is a method for IPv6 devices to automatically configure their IP addresses based on the network prefix advertised by a router. The router sends periodic router advertisements (RAs) that contain the network prefix and other parameters for the devices to use. If the network gateway is not configured to send RAs, then SLAAC will not work. A DHCP server is not needed for SLAAC, as the devices generate their own addresses without relying on a server. Dual stack and anycast routing are not related to SLAAC.

DEBUG is the log level that provides the most informative log information for troubleshooting a suspected configuration issue. Logging is a feature that allows network devices to record events and messages related to their operation and status. Logging can help network engineers to monitor, diagnose, and resolve network problems. Log levels are categories that indicate the severity or importance of a log message. Different log levels provide different amounts of detail and verbosity. DEBUG is the lowest log level, which means it provides the most detailed and verbose information about every action and event that occurs on a network device. DEBUG can help network engineers to identify configuration errors, misbehaving processes, or unexpected outcomes. However, DEBUG can also generate a lot of noise and overhead, which can affect the performance and availability of the network device. Therefore, DEBUG should be used sparingly and only when necessary. References: [CompTIA Network+ Certification Exam Objectives], Understanding Logging Levels - Cisco

A honeypot is a decoy system that is intentionally left vulnerable or exposed to attract attackers and divert them from the real targets. A honeypot can also be used to collect information about the attackers’ techniques and motives. In the scenario, the SaaS provider has left an unpatched VM available via a public DMZ port, which could be a honeypot technique to lure attackers and monitor their activities. References: https://www.comptia.org/blog/what-is-a-honeypot

• A power outage is a loss of electrical power to a network device or system, which can cause data loss, downtime, or damage12.
• A network administrator should implement power protection measures to prevent or mitigate the impact of power outages on the network12.
• One of the power protection measures is an uninterruptible power supply (UPS), which is a device that provides backup power to a network device or system in case of a power outage12.
• A UPS works by using a battery or other energy source to supply power to the connected device or system when the main power source fails or drops below a certain level12.
• A UPS can also provide power conditioning, which is the process of filtering and regulating the quality of the power supply to prevent fluctuations, spikes, or surges that can damage or disrupt the network device or system12.
• A UPS is the BEST solution to prevent the servers from going down in this scenario, because it can provide continuous and stable power to the servers during the power outage, allowing them to operate normally or shut down gracefully12.
• The other options are not the best solution to prevent the servers from going down, because they have different limitations or disadvantages:

References:

• 1: Power Protection - N10-008 CompTIA Network+ : 5.5
• 2: CompTIA Network+ N10-008 Full Course for Beginners - Power Protection (5.5)