N10-009 Exam Dumps - CompTIA Network+ Questions and Answers

Comprehensive and Detailed Explanation:

The key difference is that anIntrusion Prevention System (IPS)isinstalled in linewith network traffic, allowing it toactively block threats. In contrast, anIntrusion Detection System (IDS)onlymonitorsandalertswithout actively blocking traffic.

Breakdown of Options:

A. An IPS needs to be installed in line with traffic and an IDS does not.✅Correct answer.IPSactively prevents threats, while IDSonly detectsthem.

B. An IPS is signature-based and an IDS is not.–False, bothcanusesignature-based detection.

C. An IPS is less susceptible to false positives than an IDS.–False, both can producefalse positives, depending on configurations.

D. An IPS requires less administrative overhead than an IDS.–False, IPS requiresmoreadministrative effort due toreal-time blocking decisions.

Comprehensive and Detailed Explanation:

When an organization moves itsDNS serversto new IP addresses, theNS (Name Server) recordsmust be updated. TheNS recorddefines which DNS servers are authoritative for a domain. If these records still point to the old IP addresses, clients will continue to query the outdated servers, leading to connectivity issues.

Breakdown of Options:

A. AAAA– This record maps a domain name to an IPv6 address. Since the issue is with DNS resolution, not IP versioning, this is incorrect.

B. CNAME– ACNAME (Canonical Name) recordis used for domain aliasing, not for defining authoritative name servers.

C. MX–Mail Exchange (MX) recordsdirect email traffic to the correct mail server, which does not impact general website accessibility.

D. NS–Correct answer.NS records must be updatedto reflect the new authoritative DNS servers.

Secure Shell (SSH)is a protocol used tosecurely access remote devices over an unsecured network. It provides encrypted command-line access and is a lightweight and secure method of remote administration.

A. Site-to-site VPNconnects entire networks, not just a single host.

B. Telnetis not secure; it transmits data (including credentials) in plaintext.

C. Consoleaccess is direct via serial cable, not remote.

????Reference:

CompTIA Network+ N10-009 Official Objectives: 2.6 – Configure and troubleshoot remote access.

Nmap (Network Mapper) is a powerful network scanning tool used to discover hosts and services on a computer network. It can be used to identify which ports are open on a remote server, which can help diagnose access issues to services like a remote file server.

Port Scanning: Nmap can perform comprehensive port scans to determine which ports are open and what services are running on those ports.

Network Discovery: It provides detailed information about the host’s operating system, service versions, and network configuration.

Security Audits: Besides troubleshooting, Nmap is also used for security auditing and identifying potential vulnerabilities.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Covers network scanning tools and their uses.

Nmap Documentation: Official documentation provides extensive details on how to use Nmap for port scanning and network diagnostics.

Network+ Certification All-in-One Exam Guide: Discusses various network utilities, including Nmap, and their applications in network troubleshooting.

Understanding Switches:

Layer 2 (Data Link Layer): Traditional switches operate primarily at Layer 2, where they use MAC addresses to forward frames within a local network.

Layer 3 (Network Layer): Layer 3 switches, also known as multilayer switches, can perform routing functions using IP addresses to forward packets between different networks.

Capabilities of Multilayer Switches:

VLANs and Inter-VLAN Routing: Multilayer switches can handle VLAN (Virtual Local Area Network) configurations and perform inter-VLAN routing, enabling communication between different VLANs.

Routing Protocols: They can run routing protocols like OSPF (Open Shortest Path First) and EIGRP (Enhanced Interior Gateway Routing Protocol) to manage traffic between networks.

Comparison with Other Devices:

Hub: Operates only at Layer 1 (Physical Layer) and simply repeats incoming signals to all ports.

Transceiver: Also operates at Layer 1, converting electrical signals to optical signals and vice versa.

Modem: Primarily operates at Layer 1 and Layer 2, modulating and demodulating signals for transmission over different types of media.

Practical Application:

Multilayer switches are commonly used in enterprise networks to optimize performance and manage complex routing and switching requirements within a single device.

A mesh network is the best solution for providing reliable wireless service to public safety vehicles. In a mesh network, each node (vehicle) can connect to multiple other nodes, providing multiple paths for data to travel. This enhances reliability and redundancy, ensuring continuous connectivity even if one or more nodes fail. Mesh networks are highly resilient and are well-suited for dynamic and mobile environments such as public safety operations.References: CompTIA Network+ study materials.

EIGRP (Enhanced Interior Gateway Routing Protocol) has a default administrative distance (AD) value of 90 for internal routes. The administrative distance is used to rate the trustworthiness of routing information received from different routing protocols. EIGRP, developed by Cisco, has an AD of 90, which is lower than that of RIP (120) and OSPF (110), making it more preferred if multiple protocols provide a route to the same destination.References: CompTIA Network+ study materials.

When a user connects to a VPN and experiences connectivity issues to an external server, the problem is often related to routing or network path issues.

E. tracert:

Traces the path packets take from the user's device to the destination server.

Helps determine if the traffic is being blocked or misrouted.

F. route print:

Displays the device's routing table.

Helps diagnose whether traffic is being sent to the VPN tunnel instead of the correct external server.

Incorrect Options:

A. nslookup: Used for resolving domain names to IPs (DNS troubleshooting), but this issue is likely routing-related.

B. tcpdump: Captures packets for deep packet analysis, not typically the first step in diagnosing a VPN-related access issue.

C. arp: Used for resolving local network MAC addresses, not relevant for external VPN issues.

D. dig: Like nslookup, used for DNS queries, but not useful for routing problems.

802.11ax, also known as Wi-Fi 6, is designed for high-density environments and improves device saturation and coverage compared to previous standards.

802.11ac: While it offers high throughput, it is not optimized for high-density environments as effectively as 802.11ax.

802.11ax (Wi-Fi 6): Introduces features like OFDMA, MU-MIMO, and BSS Coloring, which enhance performance in crowded environments, reduce latency, and increase the number of devices that can be connected simultaneously.

802.11g and 802.11n: Older standards that do not offer the same level of efficiency or support for high device density as 802.11ax.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Covers the 802.11 standards and their capabilities.

Cisco Networking Academy: Provides training on Wi-Fi technologies and best practices for high-density deployments.

Network+ Certification All-in-One Exam Guide: Discusses the various 802.11 standards and their applications in different environments.