N10-009 Free Practice Test

- (Exam Topic 3)
Which of the following devices have the capability to allow communication between two different subnetworks? (Select TWO).

1. A. IDS
2. B. Access point
3. C. Layer 2 switch
4. D. Layer 3 switch
5. E. Router
6. F. Media converter

Correct Answer: DE

- (Exam Topic 1)
A network administrator redesigned the positioning of the APs to create adjacent areas of wireless coverage. After project validation, some users still report poor connectivity when their devices maintain an association to a distanced AP. Which of the following should the network administrator check FIRST?

1. A. Validate the roaming settings on the APs and WLAN clients
2. B. Verify that the AP antenna type is correct for the new layout
3. C. Check to see if MU-MIMO was properly activated on the APs
4. D. Deactivate the 2.4GHz band on the APS

Correct Answer: A
The network administrator should check the roaming settings on the APs and WLAN clients first. Roaming is the process of switching from one AP to another without losing connectivity. If the roaming settings are not configured properly, some users may experience poor connectivity when their devices stay connected to a distant AP instead of switching to a closer one. References: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/82068-roam-faq.html

- (Exam Topic 3)
Which of the following compromises internet-connected devices and makes them vulnerable to becoming part of a botnet? (Select TWO).

1. A. Deauthentication attack
2. B. Malware infection
3. C. IP spoofing
4. D. Firmware corruption
5. E. Use of default credentials
6. F. Dictionary attack

Correct Answer: BE

- (Exam Topic 1)
Client devices cannot enter a network, and the network administrator determines the DHCP scope is exhausted. The administrator wants to avoid creating a new DHCP pool. Which of the following can the administrator perform to resolve the issue?

1. A. Install load balancers
2. B. Install more switches
3. C. Decrease the number of VLANs
4. D. Reduce the lease time

Correct Answer: D
To resolve the issue of DHCP scope exhaustion without creating a new DHCP pool, the administrator can reduce the lease time. By decreasing the lease time, the IP addresses assigned by DHCP will be released back to the DHCP scope more quickly, allowing them to be assigned to new devices.
References:
CompTIA Network+ Certification Study Guide, Exam N10-007, Fourth Edition, Chapter 2: The OSI Model and Networking Protocols, Objective 2.3: Given a scenario, implement and configure the appropriate addressing schema.
https://www.networkcomputing.com/data-centers/10-tips-optimizing-dhcp-performance

- (Exam Topic 3)
A malicious user is using special software 10 perform an on-path attack. Which of the following best practices should be configured to mitigate this threat?

1. A. Dynamic ARP inspection
2. B. Role-based access
3. C. Control plane policing
4. D. MAC filtering

Correct Answer: A