CompTIA Network+ Practice Test (N10-009)

The correct answer is 'True'. IEEE 802.11h standard was indeed implemented to address issues of interference with systems like military and satellite radar operations, particularly in the 5GHz frequency band. This regulation is critical for avoiding harmful interference in environments where these radar systems operate, ensuring wireless networks adapt to existing frequency uses via mechanisms like DFS and TPC.

IPSec is the correct answer because it is designed to securely exchange data over public networks such as the internet by encrypting and authenticating IP packets. This protocol includes provisions for establishing mutual authentication between agents at the beginning of a session and negotiation of cryptographic keys to be used during the session, making it ideal for VPN tunnels. Generic Routing Encapsulation (GRE) is used to encapsulate a wide variety of protocol packet types inside IP tunnels, facilitating VPN operations but does not inherently provide encryption or security mechanisms. User Datagram Protocol (UDP) is often used by applications that require a fast, connectionless transmission without built-in security features. Transmission Control Protocol (TCP), although reliable, does not provide encryption or security functions required for secure tunneling.

An SNMP Trap in network management serves as an unsolicited message from an SNMP agent to a management station, indicating that a specific event or threshold has been reached. This is crucial for immediate notifications without the need for the manager to poll the device. For example, Traps can inform the manager about device resets, link status changes, or unauthorized access attempts, enabling rapid response to issues. The incorrect answers describe aspects not attributed specifically to Traps but rather to different SNMP operations or general network procedures.

The AAAA record is used in DNS to map a hostname to its corresponding IPv6 address, which is necessary for routing to the correct network address in an IPv6 environment. The A record is used for IPv4 addresses, not IPv6. The CNAME record is used for aliasing and does not provide IP mapping. The MX record points to the mail servers handling email for the domain and does not involve direct IP address mapping. TXT records are used for providing arbitrary text about a host or other metadata associated with a domain. NS records identify DNS servers responsible for the domain, not the IP addresses of the hosts within the domain.

In the 2.4GHz frequency band, only channels 1, 6, and 11 do not overlap with each other, providing the clearest and most interference-free channels possible in this band. Selecting one of these channels minimizes the likelihood of cross-channel interference, which is crucial in a busy office environment. Channels 3 and 9, despite being valid choices, partially overlap with other channels, potentially leading to poorer performance due to interference.

Network security groups are used primarily to control inbound and outbound traffic based on a set of security rules. These rules determine which traffic is allowed to or from network interfaces in virtual networks. It is essential for ensuring that only authorized network traffic can access resources, thus providing a layer of protection against unauthorized access and attacks. Unlike VLANs which segment networks at layer 2, or firewalls, which inspect and filter traffic more deeply, network security groups operate at a basic level using simple rules to allow or block traffic.

A Graphical User Interface (GUI) for a network device typically facilitates visual interaction with the device allowing for easier monitoring and management tasks, such as viewing status indicators and statistics. This option contrasts with command-line interfaces that require command memorization and provide less immediate visual feedback.

Coaxial cable's primary advantage is its resistance to signal interference. Its design includes a central conductor surrounded by an insulating layer, a conductive shield, and an outer cover, which helps protect data signals from electromagnetic interference (EMI) and radio frequency interference (RFI), common in many industrial environments. While other options like cost-effectiveness and longer connector lifespan might be appealing, they do not represent the primary benefits of coaxial cable.

The correct answer is 'False'. OSPF actually utilizes the Dijkstra's algorithm to compute the shortest path tree for each route. The Bellman-Ford algorithm, conversely, is used by protocols like RIP, which is different from OSPF.

Time-based authentication leverages a mechanism where passwords are only valid for a very limited time, such as in one-time passwords (OTPs) used in 2FA systems. After the time lapses (typically 30 seconds to a few minutes), the password cannot be used again, enhancing security by minimizing the risk window for password theft or reuse. This method contrasts from passwords or PINs that do not expire by time but perhaps after several uses.

Using cross-cut shredders for the disposal of sensitive documents is the most effective method for mitigating the risk of dumpster diving since it renders information unrecoverable. This strategy directly combats the extraction of readable or reusable data from discarded materials. While securely locking the dumpsters prevents immediate access, it does not permanently destroy the data, leaving it vulnerable if physical security is breached. Implementing rigorous trash disposal logs helps in traceability but does little to stop theft in progress. Conducting periodic security training raises awareness about the importance of proper document handling but doesn’t ensure the physical destruction of sensitive information.

In a networking context, a port set to 'Suspended' typically indicates an issue with port aggregation protocols, such as LACP (Link Aggregation Control Protocol) misconfiguration or disagreement. This state can occur if the aggregation negotiation fails, which is crucial in scenarios where multiple links are combined to form a single logical link for bandwidth aggregation and redundancy. Answers involving VLAN mismatch or cable issues, though potentially valid troubleshooting considerations, are less directly associated with the 'Suspended' status, as these would more likely lead to different port statuses or error indications.

Direct Connect is the correct choice because it provides a dedicated network connection between the on-premise data center and the cloud provider. This setup enhances bandwidth throughput, reduces latency, and offers a more consistent network experience than internet-based connections. VPN, while secure, still utilizes the public internet which can introduce variability in network performance. Internet Gateways and NAT Gateways are essential for internet-facing access in cloud environments but do not offer the dedicated, non-public connection needed for this scenario. Virtual Private Cloud (VPC) is a segmented, secure space within a public cloud, but does not inherently provide a physical connection to on-premise networks.

The statement is false. A cold site is the most basic form of a backup site for an organization and typically includes the facility and infrastructure (e.g., building, power, cooling) but not the necessary IT and office equipment, which are set up as needed after the disaster occurs. It does not include pre-installed applications or real-time data mirroring, which are more characteristic of hot sites or warm sites.

Configuring the Voice VLAN setting is pivotal for enhancing the performance of communications over IP-based voice devices. This setting allows the switch to prioritize voice traffic over other types of network traffic, which is critical for reducing latency and ensuring clear audio transmissions. Though 802.1Q tagging helps in identifying traffic from different VLANs, it does not prioritize traffic. Link aggregation and Speed and duplex settings optimize bandwidth and connection quality respectively, but they do not prioritize voice traffic which is critical for performance in communication scenarios.