Changed N10-009 Exam Questions

Comprehensive and Detailed Explanation (paraphrased, aligned to N10-009):

An evil twin is a malicious wireless access point that impersonates a legitimate SSID. Once victims connect, the attacker can intercept and manipulate traffic, performing an on-path (man-in-the-middle) attack—capturing credentials, injecting content, or downgrading encryption.

B. DDoS overwhelms services with traffic; it’s not the typical follow-on from clients joining a rogue AP.

C. ARP spoofing is another way to become on-path on wired segments, but with an evil twin, the wireless association itself enables the on-path position.

D. Phishing is social engineering; while an evil twin could be used to present fake portals, the primary technical posture after connection is on-path.

References (CompTIA Network+ N10-009):

Domain: Network Security — Wireless threats (rogue APs/evil twins), traffic interception, on-path attacks.

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Out-of-band (OOB) management refers to using a dedicated management network that is physically separate from the regular data network. This management network uses a different set of IP addresses to ensure that management traffic is isolated from user data traffic, providing a secure way to manage network devices even if the main network is down or compromised.References: CompTIA Network+ study materials. ​

The correct answer is The port's VLAN assignment on the switch because the symptoms indicate a Layer 2 segmentation issue. According to CompTIA Network+ (N10-009) troubleshooting methodology and VLAN concepts, if the IP configuration is correct and the TCP/IP stack is functioning, but the default gateway is unreachable, the issue often involves improper VLAN configuration.

In a switched environment, devices must be assigned to the correct VLAN to communicate with the appropriate default gateway interface (often configured on a router or Layer 3 switch). If the user’s switch port is assigned to the wrong VLAN, the workstation may have a valid IP address but will not be able to reach the gateway because it is logically separated into a different broadcast domain.

Option A is unlikely since the IP configuration is already confirmed correct. Option C is not relevant because the issue is localized to a specific user, not a widespread DHCP failure. Option D refers to switch management configuration, which does not affect user traffic routing to the gateway.

Therefore, verifying the switch port’s VLAN assignment is the most appropriate next troubleshooting step.

When a network interface's indicator lights are not blinking on either the computer or the switch, it suggests a physical layer issue. Here is the detailed reasoning:

Ethernet Properly Connected: The Ethernet cable is correctly connected, eliminating issues related to a loose or faulty cable.

No Indicator Lights: The absence of blinking indicator lights on both the computer and the switch typically points to the port being administratively shut down.

Switch Port Shut Down: In networking, a switch port can be administratively shut down, disabling it from passing any traffic. This state is configured by network administrators and can be verified and changed using the command-line interface (CLI) of the switch.

Command to Check and Enable Port:

bash

Copy code

Switch> enable

Switch# configure terminal

Switch(config)# interface [interface id]

Switch(config-if)# no shutdown

The command no shutdown re-enables the interface if it was previously disabled. This will restore the link and the indicator lights should start blinking, showing activity.

Basic Configuration Commands PDF, sections on interface configuration (e.g., shutdown, no shutdown)​​.