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NEW QUESTION # 282
Which of the following best describes a characteristic of a DNS poisoning attack?
Answer: B
Explanation:
DNS poisoning involves inserting malicious or false DNS records into a DNS server's cache so that subsequent queries return incorrect IP address mappings to users.
NEW QUESTION # 283
A network administrator is configuring a wireless network with an ESSID. Which of the following is a user benefit of ESSID compared to SSID?
Answer: A
Explanation:
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.
Reference: CompTIA Network+ study materials.
NEW QUESTION # 284
A laptop user gets an error when trying to access the company ' s intranet site. A technician runs ipconfig /all with the following results:
Autoconfiguration IPv4 Address: 169.254.0.5 (Preferred)
Subnet Mask: 255.255.0.0
Default Gateway:
DHCP Server:
Which of the following is most likely causing the issue?
Answer: A
Explanation:
The correct answer is C. Address pool exhaustion. The client has an address in the 169.254.x.x range, which is an APIPA address automatically assigned when a system cannot get a valid IP lease from DHCP. The absence of both a default gateway and a DHCP server entry confirms that the laptop did not receive proper network settings from the DHCP service.
Among the choices, the most likely cause is that the DHCP server has no addresses left in its scope. When the address pool is exhausted, new or renewing clients cannot obtain a lease and must self-assign an APIPA address instead. A client with that kind of address cannot normally reach internal resources such as an intranet site because it lacks the correct network configuration.
The other options do not align with the evidence shown. A short DHCP lease duration could create frequent renewals, but it does not directly explain this output. An IIS malfunction would affect the web server, not the client's IP assignment. An IDS misconfiguration would not normally cause a host to self-assign a 169.254 address.
This is a DHCP-related problem, and from the available answers, address pool exhaustion is the best explanation.
NEW QUESTION # 285
Which of the following is the next step to take after successfully testing a root cause theory?
Answer: B
Explanation:
Troubleshooting Methodology:
Confirming the Root Cause: After testing and confirming the theory, the next logical step is to address the issue by implementing a solution.
Implementation of the Solution:
Resolve the Issue: Implement the identified solution to rectify the problem. This step involves making necessary changes to the network configuration, replacing faulty hardware, or applying software patches.
Documentation: Document the solution and the steps taken to resolve the issue to provide a reference for future troubleshooting.
Comparison with Other Steps:
Determine Resolution Steps: This is part of the implementation process where specific actions are outlined, but the actual next step after testing is to implement those steps.
Duplicate the Problem in a Lab: This step is typically done earlier in the troubleshooting process to understand the problem, not after confirming the root cause.
Present the Theory for Approval: In some scenarios, presenting the theory might be necessary for major changes, but generally, once the root cause is confirmed, the solution should be implemented.
Final Verification:
After implementing the solution, it is important to verify that the issue is resolved and that normal operations are restored. This may involve monitoring the network and testing to ensure no further issues arise.
Reference:
CompTIA Network+ study materials on troubleshooting methodologies and best practices.
NEW QUESTION # 286
A company is hosting a secure that requires all connections to the server to be encrypted. A junior administrator needs to harded the web server. The following ports on the web server. The following ports on the web server are open:
Which of the following ports should be disabled?
Answer: A
Explanation:
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.
NEW QUESTION # 287
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