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

A hybrid cloud deployment model is the best choice for the CTO's requirements. It allows the organization to run key services from the on-site data center while leveraging the cloud for enterprise services. This approach provides flexibility, scalability, and cost savings, while also minimizing disruptions to users by keeping critical services local. The hybrid model integrates both private and public cloud environments, offering the benefits of both.References: CompTIA Network+ study materials and cloud computing principles.

When two devices on different subnets are unable to communicate, but can communicate with other devices on their own subnet, the issue is most often related torouting. Devices on different subnets require adefault gatewayto route traffic between networks.

If thedefault gateway is incorrectly configured, the device won’t know how to reach other subnets.

Faulty cables (Option B) or duplex mismatches (Option C) would likely cause connectivity issues even within the local subnet, which is not the case here.

VLAN mismatches (Option D) are typically issues with switch port configurations and would likely cause total loss of connectivity, including within the same subnet.

✅So, the most probable andlogical causeis anincorrect default gateway.

A CNAME (Canonical Name) record is used in DNS to alias one domain name to another. This means that newapplication.comptia.org can be made to resolve to the same IP address as www.comptia.org by creating a CNAME record pointing newapplication.comptia.org to www.comptia.org. SOA (Start of Authority) is used for DNS zone information, MX (Mail Exchange) is for mail server records, and NS (Name Server) is for specifying authoritative DNS servers.

The customer can accesslocal resources(a database server), which meanslocal networking is working. However, the inability to reach the internet suggests an issue with thedefault gateway. If thedefault gateway is unreachable, packets will not be routed outside the local network.

Breakdown of Options:

A. Incorrect DNS–DNS issueswould cause problemsresolving domain names, but the user should still be able to access external resources via IP addresses.

B. Unreachable gateway–✅Correct answer.If thedefault gateway is incorrect or unreachable, the devicecannot route traffic to the internet.

C. Failed root bridge–STP (Spanning Tree Protocol) failurescauseswitching issues, but the user can still access local devices, meaning STP is not the problem.

D. Poor upstream routing– Wouldaffect the entire network, not just one user.

This is a classic example ofsocial engineering, where an attacker manipulates individuals into giving up confidential information, such as credentials, by pretending to be someone trustworthy (like help desk staff).

B. Tailgatinginvolves physical access without authentication.

C. Shoulder surfingis spying over someone's shoulder to steal info.

D. Smishingis phishing via SMS.

E. Evil twininvolves a rogue Wi-Fi access point impersonating a legitimate one.

????Reference:

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

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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.

The server’s subnet mask is255.255.255.224 (/27), which covers IPs from192.168.100.224 to 192.168.100.255. However, the router only recognizes192.168.100.0/24, indicating amismatch between the server’s subnet and the router's network.

Correct maskfor the /24 network is255.255.255.0, allowing 256 IPs from 192.168.100.0 to 192.168.100.255.

This mismatch would result in routing issues, especially with the gateway outside of the subnet range.

????Reference:

CompTIA Network+ N10-009 Official Objectives: 5.2 – Given a scenario, troubleshoot common wired connectivity issues.

Comprehensive and Detailed Explanation:

LDAP (Lightweight Directory Access Protocol) usesport 389for standard connections andport 636forLDAP over SSL (LDAPS), whichsecures directory service communication.

Breakdown of Options:

A. 22– SSH port,not used for directory services.

B. 389– Used forLDAP, butnot encrypted.

C. 445– Used forSMB file sharing,not LDAP.

D. 636–Correct answer.LDAPS (LDAP over SSL/TLS) secures directory authentication.