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NEW QUESTION # 60
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?
Answer: A
Explanation:
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.
Reference:
CompTIA Network+ study materials on subnetting and IP address configuration.
NEW QUESTION # 61
An attack on an internal server is traced to an isolated guest network. Which of the following best describes the attack?
Answer: C
Explanation:
VLAN hopping allows traffic from one isolated VLAN, such as a guest network, to reach another VLAN where internal systems reside, bypassing intended network segmentation.
NEW QUESTION # 62
Which of the following should a network engineer check to verify that updates are still being released for a device?
Answer: A
Explanation:
End-of-life documentation indicates the support status of a device, including whether updates and patches are still being released by the vendor.
NEW QUESTION # 63
A user's home mesh wireless network is experiencing latency issues. A technician has:
Performed a speed test.
Rebooted the devices.
Performed a site survey.
Performed a wireless packet capture.
The technician reviews the following information:
The technician notices in the packet capture that frames were retransmitted. Which of the following is the most likely cause of the user's network issue?
Answer: C
Explanation:
Comprehensive and Detailed Step-by-Step
Too much overlap on the same channel (all devices on channel 11) causes interference, leading to retransmissions and high latency.
Same SSIDs (A) are expected in mesh networks.
Device compatibility (C) would show different symptoms.
Node power (D) affects coverage, not congestion.
Reference: CompTIA Network+ N10-009 Official Documentation - Wireless Troubleshooting & Signal Interference.
NEW QUESTION # 64
Which of the following most directly secures sensitive information on a network?
Answer: A
Explanation:
The option that most directly secures sensitive information on the network is data-in-transit encryption. This ensures that data packets are unreadable to attackers who intercept them while moving across the network.
Protocols such as TLS, HTTPS, IPsec, and SSH protect confidentiality and integrity of sensitive information.
B). Principle of least privilege (PoLP) secures access control but does not directly protect data in motion.
C). Role-based access control (RBAC) enforces permissions but again does not secure the data while transmitted.
D). Multifactor authentication (MFA) strengthens identity verification but does not directly protect the data itself once transmitted.
Thus, while all options contribute to overall security, encryption of data-in-transit most directly addresses protection of sensitive information on the network.
References (CompTIA Network+ N10-009):
Domain: Network Security - Encryption methods, confidentiality, data-in-transit protection.
NEW QUESTION # 65
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