A user submits an escalated ticket regarding failed logins on their laptop. The user states that the time displayed on the laptop is incorrect. An administrator thinks the issue is related to the NTP. Which of the following should the administrator do next?
A. Create a plan of action.
B. Implement a solution.
C. Identify the problem.
D. Test the theory.
Show Answer
Correct Answer: D
Explanation: In the standard troubleshooting methodology, once a probable cause (theory) is formed—here, that incorrect time/NTP is causing login failures—the next step is to test the theory. Planning and implementation come after the theory is validated.
Question 78
A technician is implementing a new SD-WAN device with a default configuration. The technician receives a URL via email and connects the new device to the internet to complete the installation. Which of the following is this an example of?
A. Voice VLAN
B. Native VLAN
C. Data VLAN
D. Trunk port
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Correct Answer: C
Explanation: The SD-WAN device is using its default configuration to connect to the internet and reach a provisioning URL. This is standard user/data traffic, not voice traffic, and there is no indication of trunking or native VLAN behavior. Therefore, it is operating on a data VLAN.
Question 79
A data center administrator is evaluating the use of jumbo frames within a storage environment. Which of the following describes the best reason to use jumbo frames in the storage environment?
A. To reduce device overhead
B. To report on the current root switch in the STP
C. To improve routing convergence
D. To increase drive throughput
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Correct Answer: A
Explanation: Jumbo frames increase the Ethernet MTU so more data is carried per frame. In storage networks (iSCSI, NFS, FCoE), this reduces the number of frames that must be processed, lowering CPU interrupts and protocol overhead on hosts and network devices. The primary benefit is reduced device overhead, not STP behavior, routing convergence, or raw drive speed.
Question 80
A network administrator needs to secure SNMP access with authentication and encryption. Which of the following should the administrator use?
A. SNMPv3
B. SNMP community string
C. SNMP ACL access group
D. SNMPv2c
Show Answer
Correct Answer: A
Explanation: SNMPv3 is the only SNMP version that provides built-in authentication and encryption (privacy). SNMPv1 and SNMPv2c rely on plain-text community strings with no encryption, and ACLs only restrict access but do not secure the protocol itself. Therefore, SNMPv3 is required to secure SNMP with authentication and encryption.
Question 81
A medical clinic recently configured a guest wireless network on the existing router. Since then, guests have been changing the music on the speaker system. Which of the following actions should the clinic take to prevent unauthorized access? (Choose two.)
A. Isolate smart devices to their own network segment.
B. Configure IPS to prevent guests from making changes.
C. Install a new AP on the network.
D. Set up a syslog server to log who is making changes.
E. Change the default credentials.
F. Configure GRE on the wireless router.
Show Answer
Correct Answer: A, E
Explanation: Guests changing the speaker music indicates they can access internal smart devices from the guest wireless network. Isolating smart devices onto their own network segment prevents guest users from reaching or controlling them. Changing default credentials removes an easy attack vector, as many smart speakers and network devices are compromised through unchanged factory usernames and passwords. Together, these actions directly prevent unauthorized access.
Question 82
A network engineer needs to deploy an access point at a remote office so that it will not communicate back to the wireless LAN controller. Which of the following deployment methods must the engineer use to accomplish this task?
A. ESSID
B. Lightweight
C. Autonomous
D. Ad hoc
Show Answer
Correct Answer: C
Explanation: An autonomous access point operates independently and does not require or communicate with a wireless LAN controller. Lightweight APs must connect to a controller, ESSID is just a network identifier, and ad hoc refers to client-to-client networking, not AP deployment.
Question 83
A network technician receives a new ticket while working on another issue. The new ticket is critical to business operations. Which of the following documents should the technician reference to determine which ticket to complete first?
A. NDA
B. AUP
C. SLA
D. MOU
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Correct Answer: C
Explanation: An SLA (Service Level Agreement) defines service priorities, response times, and resolution targets for different ticket severities. When a critical ticket arrives, the technician uses the SLA to determine which issue must be addressed first based on business impact.
Question 84
A network administrator determines that some switch ports have more errors present than expected. The administrator traces the cabling associated with these ports. Which of the following would most likely be causing the errors?
A. Shielded conduit
B. Plenum spaces
C. Voltage transformers
D. Hydraulic lifts
Show Answer
Correct Answer: C
Explanation: Voltage transformers generate strong electromagnetic interference (EMI). If network cabling—especially unshielded twisted pair—is routed near transformers, the EMI can induce noise on the lines, leading to increased errors on switch ports. The other options are not typical sources of EMI that would cause such errors.
Question 85
Which of the following describes a malicious application that takes advantage of a software flaw?
A. Risk
B. Vulnerability
C. Exploit
D. Threat
Show Answer
Correct Answer: C
Explanation: A malicious application that takes advantage of a software flaw is an exploit. A vulnerability is the flaw itself, a threat is a potential source of harm, and risk is the likelihood/impact of harm. An exploit specifically describes code or an application that leverages a vulnerability.
Question 86
After installing a new wireless access point, an engineer tests the device and sees that it is not performing at the rated speeds. Which of the following should the engineer do to troubleshoot the issue? (Choose two.)
A. Ensure a bottleneck is not coming from other devices on the network.
B. Install the latest firmware for the device.
C. Create a new VLAN for the access point.
D. Make sure the SSID is not longer than 16 characters.
E. Configure the AP in autonomous mode.
F. Install a wireless LAN controller.
Show Answer
Correct Answer: A, B
Explanation: If a new access point is not achieving rated speeds, the first step is to verify that performance is not being limited elsewhere in the network, such as by an underspeed switch port, cabling issue, or upstream congestion. Additionally, ensuring the AP is running the latest firmware is critical, as firmware updates often resolve performance bugs and improve throughput. The other options do not directly affect raw performance in this scenario.
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