Pass the CompTIA Network+ N10-009 Questions and answers with ExamsMirror

The loopback address 127.0.0.1 is used to test the TCP/IP stack of the local machine. Pinging this address confirms whether the local system's networking stack is functioning correctly.

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An access point (AP) provides users with an extended footprint that allows connections from multiple devices within a designated Wireless Local Area Network (WLAN).

Router: Typically used to connect different networks, not specifically for extending wireless coverage.

Switch: Used to connect devices within a wired network, not for providing wireless access.

Access Point (AP): Extends wireless network coverage, allowing multiple wireless devices to connect to the network.

Firewall: Primarily used for network security, controlling incoming and outgoing traffic based on security rules, not for providing wireless connectivity.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Explains the roles and functions of network appliances, including access points.

Cisco Networking Academy: Provides training on deploying and managing wireless networks with access points.

Network+ Certification All-in-One Exam Guide: Covers network devices and their roles in creating and managing networks.

Infrastructure as a Service (IaaS) provides scalable compute power, storage, and networking resources on demand. It is the best choice for a company that needs to customize its cloud solution based on size, compute capacity, and storage needs.

IaaS Benefits:

Provides virtual machines, storage, and networking resources.

Scalable based on company needs.

Reduces the need for physical infrastructure.

Incorrect Options:

A. SaaS (Software as a Service): Delivers software applications (e.g., Google Docs, Microsoft 365) but does not provide compute/storage infrastructure.

B. PaaS (Platform as a Service): Provides a development environment for application deployment but not full infrastructure control.

D. IaC (Infrastructure as Code): A methodology for automating infrastructure, not a cloud deployment model.

Role of NTP (Network Time Protocol):

NTP is used to synchronize the clocks of network devices to a reference time source. Accurate time synchronization is critical for correlating events and logs from different systems.

Importance for SIEM Systems:

Event Correlation: SIEM (Security Information and Event Management) systems collect and analyze log data from various sources. Accurate timestamps are essential for correlating events across multiple systems.

Time Consistency: Without synchronized time, it is challenging to piece together the sequence of events during an incident, making forensic analysis difficult.

Comparison with Other Protocols:

DNS (Domain Name System): Translates domain names to IP addresses but is not related to time synchronization.

LDAP (Lightweight Directory Access Protocol): Used for directory services, such as user authentication and authorization.

DHCP (Dynamic Host Configuration Protocol): Assigns IP addresses to devices on a network but does not handle time synchronization.

Implementation:

Ensure that all network devices, servers, and endpoints are synchronized using NTP. This can be achieved by configuring devices to use an NTP server, which could be a local server or an external time source.

If the company’s SSID is not visible in some areas while other networks are still visible, the most likely cause is insufficient wireless coverage. The wireless signal does not reach those areas, meaning additional access points or signal boosters may be required.

Breakdown of Options:

A. Interference or channel overlap – Would cause slow or unstable connections, but the SSID should still be visible.

B. Insufficient wireless coverage – ✅ Correct answer. If the SSID is not appearing, the signal is too weak in that area.

C. Roaming misconfiguration – Would cause devices to stay on weaker APs instead of switching, but the SSID should still be visible.

D. Client disassociation issues – This would disconnect users, but they should still see the network.

The Network layer (Layer 3 of the OSI model) can utilize the connectionless protocol IP (Internet Protocol) to send data packets independently without establishing a connection. This approach is typical for protocols like IP, which provide best-effort delivery rather than guaranteed delivery. The document explains:

“The OSI Network Layer is responsible for logical addressing and routing, and it can utilize connectionless protocols like IP to send packets without requiring a session setup. This layer does not guarantee packet delivery, relying on higher layers for error detection or correction if needed.”

The issue is that more students have arrived on campus, meaning the available IP addresses are exhausted. To fix this, the administrator should increase the DHCP scope size to allow more devices to obtain IP addresses.

Breakdown of Options:

A. Enable IP helper – IP helper is used to forward DHCP requests across different subnets. However, the problem here is that the DHCP scope is full, not that requests are not reaching the server.

B. Change the subnet mask – The subnet mask determines the number of available hosts, but changing it without increasing the IP pool does not help.

C. Increase the scope size – Correct answer. Expanding the DHCP scope provides more IP addresses for assignment.

D. Add address exclusions – Exclusions reserve IP addresses, which would further reduce available addresses instead of solving the issue.

An Extended Service Set Identifier (ESSID) allows multiple access points to share the same SSID, enabling seamless roaming for users. This means that users can move between different access points within the same ESSID without losing connection or having to reauthenticate. This provides a better user experience, especially in large environments such as office buildings or campuses.References: CompTIA Network+ study materials. ​

GSM (Global System for Mobile communications) is the international standard that uses SIM cards to authenticate and connect phones to the cellular network. GSM allows users to place and receive calls while traveling globally, provided they have a SIM card. CDMA, on the other hand, does not use SIM cards in the same way and is primarily used in the United States. (Reference: CompTIA Network+ Study Guide, Chapter on Network Fundamentals)

DNS filtering blocks access to known malicious websites by comparing domain requests against a list of allowed or blocked URLs. It is an effective defense against phishing and other web-based attacks.

From Andrew Ramdayal’s guide:

“URL filtering restricts access to specific websites or web content by comparing URLs against a predefined list of allowed or blocked sites…commonly used to prevent users from accessing malicious sites.”