SSH (Secure Shell) is a cryptographic network protocol that enables secure remote management and operation of network devices, including routers and switches. SSH encrypts traffic, making it more secure than alternatives like Telnet, which sends data in plaintext. The document states:

“SSH (Secure Shell) is the recommended protocol for secure, interactive remote management of network devices. It provides a secure channel over an unsecured network by encrypting the traffic between the administrator’s workstation and the managed device.”

A content filter blocks access to specific websites based on category, URL, or keywords. This is the best solution to restrict gambling websites.

Breakdown of Options:

A. ACLs – Control network access, not specific web content.

B. Content filter – ✅ Correct answer. Used to block access to unwanted websites.

C. Port security – Prevents unauthorized device connections, not web traffic filtering.

D. Screened subnet – A DMZ isolates public-facing servers, not user restrictions.

The correct answer is D. IP address management . In the CompTIA Network+ N10-009 objectives, network documentation and operational procedures include maintaining accurate records for addressing, device configurations, and infrastructure changes. When a network engineer deploys new virtual servers and configures their NICs, the most directly affected documentation is the IP address management , often called IPAM. IPAM tracks assigned IP addresses, subnets, gateways, DNS settings, DHCP reservations, static assignments, and address availability.

Because the scenario specifically states that the engineer configured the NICs , the key networking detail is that each virtual server’s network interface likely received IP addressing information. Updating IP address management prevents duplicate IP assignments, supports troubleshooting, and helps administrators understand which addresses are in use across the environment.

The other options are less appropriate. Asset inventory may need updating when new servers are created, but the question emphasizes NIC configuration, making IPAM the better answer. Warranty support applies mainly to physical hardware and vendor support contracts, which is not the main concern for virtual servers. Rack diagrams document physical rack placement, power, and cabling, but virtual servers do not occupy rack space individually. Therefore, the best documentation to update after configuring NICs on new virtual servers is IP address management .

TLS (Transport Layer Security) is the protocol that provides encryption in transit for HTTPS. It ensures data is encrypted between the client (browser) and the web server, protecting it from interception or tampering.

A. SSH is used for secure terminal access, not HTTPS.

C. SCADA refers to control systems, not encryption protocols.

D. RADIUS is an authentication protocol, not for encrypting HTTPS traffic.

???? Reference:

CompTIA Network+ N10-009 Official Objectives: 4.2 – Identify common security threats and vulnerabilities.

CompTIA Network+ N10-009 Official Objectives: 4.6 – Explain authentication and access controls.

Voice VLANs rely on 802.1Q tagging to separate voice traffic from data traffic on the same physical link. This separation allows QoS policies to prioritize VoIP, reducing jitter and packet loss.

B. Jumbo frames improve throughput for large data transfers, not voice.

C. Native VLAN is the untagged VLAN, not specifically for voice.

D. Link aggregation bundles links for bandwidth/redundancy, not QoS.

References (CompTIA Network+ N10-009):

Domain: Network Infrastructure — VLANs, voice VLANs, 802.1Q tagging, QoS.

Troubleshooting poor performance of a newly installed access point involves multiple steps. Checking for network bottlenecks and ensuring the device firmware is up to date are crucial first steps. The document confirms:“Network bottlenecks can severely limit the performance of even the fastest wireless access points, so it’s essential to verify that no other devices are causing a slowdown. In addition, keeping firmware updated ensures optimal performance and security.”

For a web server that requires all connections to be encrypted, port 80 (HTTP) should be disabled. Port 80 is used for unencrypted web traffic, whereas port 443 is used for HTTPS, which provides encrypted communication.

Port 80 (HTTP): This port is used for unsecured web traffic. Disabling this port ensures that all web traffic must use HTTPS, which encrypts the data in transit.

Port 443 (HTTPS): This port is used for secure web traffic via SSL/TLS encryption. Keeping this port open ensures that secure connections can be made to the web server.

Other Ports:

Port 22: Used for SSH, providing secure remote access and file transfers.

Port 587: Used for secure email submission (SMTP) with encryption.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Discusses the roles and security implications of various ports and protocols.

Cisco Networking Academy: Provides training on secure web server configuration and port management.

Network+ Certification All-in-One Exam Guide: Covers port security and best practices for securing web servers.

The right answer is A. Trap . In SNMP, a trap is an unsolicited notification sent from a managed device to the management system when a significant event happens. A switch detecting that an interface has gone up or down is a textbook example of the kind of event that can trigger this kind of message.

That is different from normal SNMP polling, where the monitoring server asks the device for status information on a schedule. With a trap, the device does not wait to be asked. It sends the alert immediately, which makes it useful for link failures, threshold violations, and other time-sensitive conditions.

The other choices are related to SNMP, but not in the same way. An object identifier (OID) points to a specific managed value. A string is commonly associated with SNMP community information in older versions. A MIB is the structured database of manageable objects. None of those are the actual alerting mechanism.

Because the question asks for an automatic alert when link status changes, the feature being described is clearly an SNMP trap .

PaaS (Platform as a Service) is best suited for application development because it provides a managed platform that includes the runtime environment, development frameworks, middleware, databases (often), and build/deployment tooling. In a PaaS model, the cloud provider manages the underlying infrastructure (servers, storage, networking, OS patching, and often the application runtime), allowing developers to focus on writing code, testing, and releasing applications quickly. This aligns with Network+ cloud concepts where service models are compared by responsibility: PaaS reduces operational overhead for the customer and accelerates development through standardized environments and automation.

Mobile access is a use case for remote access solutions (VPN, zero trust access, MDM), not specifically PaaS. An e-commerce site could be hosted using many models (IaaS, PaaS, SaaS), so it’s not the most specific match. Cloud-native software describes an architectural style (microservices, containers, managed services) and can be built using PaaS components, but it is broader than a single “use case” and is not as directly tied to the PaaS definition as application development is. Therefore, application development is the clearest and most accurate PaaS use case.

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A captive portal is a web page that users must view and interact with before being granted access to a network. It is commonly used in guest networks to enforce terms of use agreements. When a user connects to the network, they are redirected to this portal where they must accept the terms of use before proceeding. This method ensures that users are aware of and agree to the network ' s policies, making it the best choice for this scenario. References: CompTIA Network+ Exam Objectives and official study guides.

It is common for an access port to have both a voice VLAN and a data VLAN. A voice VLAN separates voice traffic from regular data traffic, ensuring better quality and security for voice communications.

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Understanding End-of-Support:

End-of-Support Status: When a vendor declares a device as end-of-support, it means the device will no longer receive updates, patches, or technical support. This poses a security risk as new vulnerabilities will not be addressed.

Risks of Keeping an End-of-Support Device:

Security Vulnerabilities: Without updates, the switch becomes susceptible to new security threats.

Compliance Issues: Many regulatory frameworks require that critical infrastructure be maintained with supported and secure hardware.

Best Next Step - Replacement:

Decommission and Replace: The most secure approach is to replace the end-of-support switch with a new, supported model. This ensures the infrastructure remains secure and compliant with current standards.

Planning and Execution: Plan for the replacement by evaluating the network ' s needs, selecting a suitable replacement switch, and scheduling downtime for the hardware swap.

Comparison with Other Options:

Apply the Latest Patches: While helpful, this does not address future vulnerabilities since no further patches will be provided.

Ensure the Current Firmware Has No Issues: This is only a temporary measure and does not mitigate future risks.

Isolate the Switch from the Network: Isolating the switch may disrupt network operations and is not a viable long-term solution.

An incorrect pinout on the patch cable could prevent network connectivity due to mismatched wiring. Even if the cables are the correct length and type, a pinout issue can cause continuity problems and prevent data transmission. Proper crimping with the correct pinout is essential for network cables to function. (Reference: CompTIA Network+ Study Guide, Chapter on Network Media and Topologies)

The three-tier hierarchical model in network design consists of three layers: access, distribution, and core. The access layer is where devices like PCs and printers connect to the network. The distribution layer aggregates the data received from the access layer switches before it is transmitted to the core layer, which is responsible for high-speed data transfer and routing. This approach improves scalability and performance in larger networks. References: CompTIA Network+ Exam Objectives and official study guides.