CompTIA Network+ Changed N10-008 Questions

A duplicate IP address occurs when two devices on the same network have the same IP address assigned to them. This can cause intermittent connection issues, as the network devices may not be able to distinguish between the two conflicting devices. A duplicate IP address can be caused by a visitor manually configuring a static IP address that is already in use by another device on the guest network. The network IP range of 192.168.1.0/28 has only 14 usable host addresses, so the chances of a duplicate IP address are higher than a larger network.

References

• 1: Troubleshooting IP Configurations – CompTIA Network+ N10-006 – 4.6
• 2: Troubleshooting Duplicate IP Addresses - CompTIA Network+ N10-005: 2.5
• 3: Network Address Translation – N10-008 CompTIA Network+ : 1.4

Dynamic routing is the process of automatically updating routing tables based on network topology changes and traffic conditions. Dynamic routing protocols use various algorithms and metrics to determine the best paths for data packets. To implement dynamic routing, a network technician needs a device that can operate at the network layer (Layer 3) of the OSI model and run dynamic routing protocols. A Layer 3 switch is such a device, as it can perform both switching and routing functions, and support protocols such as RIP, OSPF, EIGRP, etc. An IPS (intrusion prevention system) is a security device that operates at the application layer (Layer 7) and monitors and blocks malicious traffic. A bridge is a device that operates at the data link layer (Layer 2) and connects two network segments using MAC addresses. A hub is a device that operates at the physical layer (Layer 1) and broadcasts data to all connected ports. None of these devices can enable dynamic routing. References:

• Dynamic Routing
• Layer 3 Switching
• Network Devices
• [Network + N10-008 practice exam]
• [CompTIA N10-008 Free Certification Exam Material]

A long-range microwave interface is a type of wireless communication that uses high-frequency radio waves to transmit and receive data over long distances. A long-range microwave interface typically uses a parabolic antenna, also known as a dish antenna, to focus the radio waves into a narrow beam that can travel farther and with less interference than an omnidirectional antenna, which radiates the radio waves in all directions1.

One of the most common causes of input errors on a long-range microwave interface is the misalignment of the parabolic antenna. Input errors are errors that occur when the receiver cannot properly decode or process the incoming signal. If the parabolic antenna is not aligned correctly with the transmitter, the receiver may not be able to capture the full strength of the signal, or it may pick up unwanted noise or interference from other sources. This can result in corrupted or lost data, which will increase the input error count23.

To troubleshoot this issue, the junior network administrator should check the alignment of the parabolic antenna and make sure it is pointing directly at the transmitter. The administrator can use tools such as a spectrum analyzer, a signal strength meter, or a path alignment tool to measure and adjust the signal quality and alignment of the antenna24.

The other options are not likely reasons for the input errors on a long-range microwave interface. A long-range microwave interface does not use an omnidirectional signal, so it cannot be jammed or weakened by other sources. The parabolic signal does not depend on the routing protocols used by the network, so it cannot be affected by improper routing protocols.

• A media converter is a device that allows you to interconnect different types of network media, such as copper, fiber, and coaxial cables.
• A media converter can be used to connect newer network technologies, such as Gigabit Ethernet or ATM, to existing networks, such as 10BASE-T or 100BASE-T.
• A media converter can also be used to extend the distance and improve the immunity of network signals by converting them from electrical to optical or vice versa.
• A proxy server, an industrial control system, and a load balancer are not devices that can connect different physical characteristics of network media. They have different functions and purposes in a network.
• A proxy server is a device that acts as an intermediary between a client and a server, providing security, caching, and filtering services.
• An industrial control system is a system that monitors and controls industrial processes, such as manufacturing, power generation, and transportation.
• A load balancer is a device that distributes network traffic across multiple servers, improving performance and availability. References:
• Media Converters – CompTIA Network+ N10-006 – 1.5
• Transceivers (Media Converters) | Network+ Exam Cram: Networking Devices in Modern Networks