N10-009試験の準備方法｜ハイパスレートのN10-009無料ダウンロード試験｜効果的なCompTIA Network+ Certification Exam勉強方法

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CompTIA N10-009 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Network Security: This section of the exam for cybersecurity specialists and network security administrators covers the importance of basic network security concepts, Various types of attacks and their impact on the network, application of network security features, defense techniques, and solutions.\| Network Troubleshooting: For help desk technicians and network support specialists, this section covers troubleshooting methodology, troubleshooting common cabling and physical interface issues, troubleshooting common issues with network services, and use of appropriate tools or protocols to solve networking issues.
トピック 2	Network Operations: For IT operations staff and network operations center (NOC) technicians, this part of the exam covers the purpose of organizational processes and procedures and use of network monitoring technologies.
トピック 3	Networking Concepts: For network administrators and IT support professionals, this domain covers

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CompTIA Network+ Certification Exam 認定 N10-009 試験問題 (Q247-Q252):

質問 # 247
A network administrator is reviewing a production web server and observes the following output from the netstat command:
Which of the following actions should the network administrator take to harden the security of the web server?

A. Perform content filtering.
B. Enforce access control lists.
C. Disable the unused ports.
D. Set up a screened subnet.

正解：C

解説：
The netstat output shows that multiple ports are open, including Telnet (23), FTP (20), and TFTP (69), which are potential security risks. Disabling unused ports minimizes the attack surface, reducing security vulnerabilities.
Breakdown of Options:
A: Disable the unused ports - Correct answer. Unused ports should be closed to prevent unauthorized access.
B: Enforce access control lists - ACLs help control access but do not disable unnecessary services.
C: Perform content filtering - Content filtering controls web traffic, not port security.
D: Set up a screened subnet - A DMZ (screened subnet) improves security but does not address open ports.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.4: Given a scenario, implement network security measures.
CIS Benchmark for Linux & Windows Server Hardening

質問 # 248
A network administrator configured a router interface as 10.0.0.95 255.255.255.240. The administrator discovers that the router is not routing packets to a web server with IP 10.0.0.81/28. Which of the following is the best explanation?

A. Therouter interface isa broadcast address.
B. TheIP address spaceis a class A network.
C. Theweb server Is In adifferent subnet.
D. Thesubnet is in a private address space.

正解：A

解説：
* Understanding Subnetting:
* The subnet mask 255.255.255.240 (or /28) indicates that each subnet has 16 IP addresses (14 usable addresses, 1 network address, and 1 broadcast address).
* Calculating the Subnet Range:
* Subnet Calculation: For the IP address 10.0.0.95 with a /28 subnet mask:
* Network address: 10.0.0.80
* Usable IP range: 10.0.0.81 to 10.0.0.94
* Broadcast address: 10.0.0.95
* Router Interface Configuration:
* Broadcast Address Issue: The IP address 10.0.0.95 is the broadcast address for the subnet
10.0.0.80/28. Configuring a router interface with the broadcast address will cause routing issues as it is not a valid host address.
* Comparison with Other Options:
* The web server is in a different subnet: The web server (10.0.0.81) is within the same subnet range (10.0.0.80/28).
* The IP address space is a class A network: While 10.0.0.0 is a Class A network, this does not explain the routing issue caused by the broadcast address.
* The subnet is in a private address space: The private address space designation (RFC 1918) does not impact the routing issue related to the broadcast address configuration.
* Resolution:
* Reconfigure the router interface with a valid host IP address within the usable range, such as
10.0.0.94.

質問 # 249
A network administrator configured a router interface as 10.0.0.95 255.255.255.240. The administrator discovers that the router is not routing packets to a web server with IP 10.0.0.81/28. Which of the following is the best explanation?

A. Therouter interface isa broadcast address.
B. TheIP address spaceis a class A network.
C. Theweb server Is In adifferent subnet.
D. Thesubnet is in a private address space.

正解：A

解説：
* Understanding Subnetting:
* The subnet mask 255.255.255.240 (or /28) indicates that each subnet has 16 IP addresses (14 usable addresses, 1 network address, and 1 broadcast address).
* Calculating the Subnet Range:
* Subnet Calculation:For the IP address 10.0.0.95 with a /28 subnet mask:
* Network address: 10.0.0.80
* Usable IP range: 10.0.0.81 to 10.0.0.94
* Broadcast address: 10.0.0.95
* Router Interface Configuration:
* Broadcast Address Issue:The IP address 10.0.0.95 is the broadcast address for the subnet
10.0.0.80/28. Configuring a router interface with the broadcast address will cause routing issues as it is not a valid host address.
* Comparison with Other Options:
* The web server is in a different subnet:The web server (10.0.0.81) is within the same subnet range (10.0.0.80/28).
* The IP address space is a class A network:While 10.0.0.0 is a Class A network, this does not explain the routing issue caused by the broadcast address.
* The subnet is in a private address space:The private address space designation (RFC 1918) does not impact the routing issue related to the broadcast address configuration.
* Resolution:
* Reconfigure the router interface with a valid host IP address within the usable range, such as
10.0.0.94.
References:
* CompTIA Network+ study materials on subnetting and IP address configuration.

質問 # 250
Which of the following facilities is the best example of a warm site in the event of information system disruption?

A. A full electrical infrastructure in place, but no customer devices on site
B. A full infrastructure in place, but no current data on site
C. A partial infrastructure, software, and data on site
D. A combination of public and private cloud services to restore data

正解：B

解説：
A warm site typically has a full infrastructure ready, but it lacks the most up-to-date data or is not immediately operational. It requires some configuration or data restoration to become fully functional.

質問 # 251
Which of the following best describe the functions of Layer 2 of the OSI model? (Choose two.)

A. Error detecting
B. Port addressing
C. Local addressing
D. Error correcting
E. Error preventing
F. Logical addressing

正解：A、C

解説：
Layer 2 assigns physical addresses (MAC addresses) to network interface cards (NICs) for devices on a local network. These addresses are used for device-to-device communication within the same network segment.
Layer 2 includes error-detection mechanisms to ensure that data transmitted over the physical medium is free from errors or corruption. This error detection (not correction), ensures data integrity.

質問 # 252
......

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N10-009試験の準備方法｜ハイパスレートのN10-009無料ダウンロード試験｜効果的なCompTIA Network+ Certification Exam勉強方法

CompTIA N10-009 認定試験の出題範囲：

認定する-正確的なN10-009無料ダウンロード試験-試験の準備方法N10-009勉強方法

CompTIA Network+ Certification Exam 認定 N10-009 試験問題 (Q247-Q252):

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