CompTIA Network+ Practice Test (N10-009)

The statement is false; it is considered a best practice to enable automatic backups after every network change. This practice ensures that all configurations are up-to-date in case of a system failure or other issues, providing a quick recovery option and maintaining compliance with IT governance that often requires detailed logs of all configuration states.

Backup configurations should be updated more frequently than just annually, especially in dynamic environments where network settings and configurations change regularly. Frequent updates ensure that the backup remains relevant and can effectively restore network operations after a failure. Annual updates might leave the network vulnerable if significant changes have occurred since the last backup was saved.

Honeynets are networks of honeypots designed to mimic legitimate systems to attract and analyze malicious activities, but they do not function as direct network perimeter security measures such as firewalls or intrusion prevention systems that filter traffic. Their main role is in research and understanding attack methodologies, not in actively blocking or filtering traffic.

802.11h addresses Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC), which are crucial for minimizing interference and managing signal power in networks operating in the 5GHz band to comply with regulatory requirements. DFS allows devices to detect radar signals and switch to another channel if interference is detected, while TPC helps in adjusting the transmit power to the minimum needed to reach the intended receiver. This management aids in reducing interference with other devices and networks.

Installing firewalls to segment and protect data environments is in direct alignment with PCI DSS requirements, which mandate the use of firewalls to protect cardholder data within a secure network segment. By contrast, enabling two-factor authentication, while enhancing security, specifically pertains to user access and does not solely focus on PCI DSS environments. Similarly, maintaining daily backup schedules enhances data availability but does not address the direct needs of securing transactional data environments as per PCI DSS requirements. Regular patch management is also crucial but does not have the singular focus on cardholder data protection needed for PCI DSS compliance.

Single-mode fiber is the most suitable choice for this scenario because it provides a higher transmission rate and can cover long distances (beyond 100 meters) without signal degradation. Multimode fiber also supports high data rates but is typically used for shorter distances, such as connecting multiple adjacent racks in a datacenter. CAT5e and CAT6 cables are not feasible for lengths exceeding 100 meters as signal quality can degrade, especially at high data rates.

Satellite connectivity is specifically designed to provide internet coverage over vast and remote areas where terrestrial internet connections (like fiber, DSL) are not possible or economically feasible. This makes it the best option for providing reliable, wide-reaching network coverage required for real-time data sharing and communication across global, remote operations. High fees make it less appealing for low-cost solutions, while coverage limitation affects terrestrial and Cellular options in remote areas. Radio Frequency (RF) systems, though useful in specific conditions, primarily support local scale deployments and can face interference issues.

A protocol analyzer, also known as a packet sniffer, captures and analyzes network traffic. Understanding this primary function helps troubleshooters identify the source of network issues by examining individual packets and their contents, which could indicate problems such as traffic bottlenecks, unauthorized access, or malformed packets. The other options, while related to network maintenance or configuration, do not describe the direct functions of a protocol analyzer which is specifically designed for capturing and analyzing network traffic.

This statement is false. In a three-tier hierarchical model, security processes such as firewall management and intrusion detection are not primarily handled at the core layer. Instead, the core layer's main function is to provide fast and reliable connectivity across the network, focusing on high-speed switching and efficient data transport. Security processes are typically managed at the distribution layer, where security and policy-based network decisions are enforced, and at the perimeter or edge, where additional security appliances might be deployed.

Opting for HTTPS encrypted resolutions, often abbreviated as DoH, utilizes HTTPS to encrypt the resolution queries, combining HTTP with SSL/TLS. This ensures secure server identification and prevents the interception and manipulation of the resolution data during transit. Utilizing UDP, while common, does not encrypt the resolution queries, thus exposing them to potential eavesdropping and tampering. Automatic resolutions updating is primarily concerned with updating records rather than securing traffic. Lastly, resolutions over SCTP is not a standard recognized protocol for securing these queries and does not technically provide the protection required.

The observed fluctuations in signal strength depicted by the Wi-Fi analyzer are most likely due to interference. Interference can be caused by numerous factors such as other wireless signals, electronic devices, or even physical barriers that disrupt or weaken the wireless signal. Choosing a less crowded channel or relocating the wireless access points can often reduce such interference. Incorrect answers include 'Faulty network card,' which would likely cause persistent, not fluctuating issues, and 'Inactive wireless SSID,' which would result in no connectivity rather than fluctuating signals. 'Exceeding bandwidth capacity' causes slow performance but does not cause signal strength fluctuations.

TXT records are specifically designed to store arbitrary text information associated with a hostname, which includes various purposes such as verifying domain ownership, security measures, and other services that require direct information about the domain. Despite other records serving critical direct resolution roles, TXT records uniquely enable both humans and machines to read additional information that does not fit into typical resolution protocols, providing a versatile medium for various configurations.

A virtual appliance can offer network services, such as content filtering and enhanced security, running as software on virtualized environments. This allows the company to utilize existing servers and reduces the need for additional physical hardware, aligning well with the desire to expand services without substantial hardware investments. A router or switch, although crucial for network operations, primarily focuses on traffic directing and switching respectively, and not on providing the additional services mentioned. A proxy mainly serves as an intermediary for requests from clients seeking resources from other servers.

The Transport layer (Layer 4 of the OSI model) is responsible for providing mechanisms for data transfer sessions between hosts. It provides services such as connection-oriented data stream support, reliability, flow control, and error correction, all of which are essential for ensuring that data packets are transmitted reliably and in sequence. The Network layer primarily deals with logical addressing and routing, while the Data Link layer handles physical addressing, error notification, and ordered delivery of frames. The Physical layer deals with the transmission and reception of unstructured raw data over a network medium.

GRE is well-suited for encapsulating multiple types of transport layer protocols over IP networks. It allows for the wrapping of packets from various protocols to be transmitted over an IP infrastructure but does not inherently provide any encryption or authentication, distinguishing it from protocols like IPSec. IPSec, while also used for VPNs, provides robust encryption and authentication, making it a more secure option where confidentiality and data integrity are necessary. SSL/TLS primarily secures data transmissions between networked devices rather than encapsulating multiple protocols for transit. MPLS is generally used for high-performance telecommunications networks to direct and carry data from one network node to the next.