A network engineer receives a new router to use for WAN connectivity. Which of the following best describes the layer the network engineer should connect the new router to?
A. Core
B. Leaf
C. Spine
D. Access
Show Answer
Correct Answer: A
Explanation: A WAN edge router that provides external connectivity is typically connected at the core layer in a traditional three-tier enterprise network. The access layer connects end devices, while spine and leaf are components of a data center fabric rather than the enterprise campus hierarchy. Although the spine plays a role similar to a core within a leaf-spine fabric, WAN edge connectivity in this context is described using the traditional core layer.
Question 89
A network administrator needs to configure the core switches where multiple connections between data centers are used. Given the following requirements:
• Fault tolerance and redundancy
• Vendor interoperability
• Increased bandwidth
• Cost effectiveness
• Simplified management
Which of the following should the administrator configure?
A. Spanning tree
B. Interface speeds to 10GB
C. Link aggregation
D. Jumbo frames
Show Answer
Correct Answer: C
Explanation: Link aggregation combines multiple physical links into one logical connection, increasing available bandwidth while providing redundancy if a link fails. Using the standardized LACP protocol supports interoperability, and managing the bundle as one interface simplifies configuration and can make use of existing links cost-effective.
Question 90
Three access points have Ethernet that runs through the ceiling. One of the access points cannot reach the internet. Which of the following tools can help identify the issue?
A. Network tap
B. Cable tester
C. Visual fault locator
D. Toner and probe
Show Answer
Correct Answer: B
Explanation: A cable tester verifies the integrity and correct pinout of an Ethernet cable, helping identify opens, shorts, miswires, or other physical cabling faults that could prevent the access point from connecting. A network tap is for traffic monitoring, a visual fault locator is for fiber optics, and a toner and probe is primarily for tracing and identifying cable runs rather than validating cable functionality.
Question 91
An employee connects to the company network from home using a VPN. Company data uses the VPN, while internet traffic uses the home ISP connection. Which of the following best describes the connectivity method in use?
A. IPSec
B. Split-tunnel
C. Clientless
D. Out-of-band
Show Answer
Correct Answer: B
Explanation: A split-tunnel VPN routes traffic destined for the corporate network through the VPN while sending general internet traffic directly through the user's local ISP connection. IPSec is a VPN protocol, clientless VPNs use a web browser without a VPN client, and out-of-band refers to separate management or communication paths, not this traffic-routing behavior.
Question 91
Three new employees report that they are unable to access company resources, but they can connect to each other's devices. Which of the following would most likely need to be modified to resolve the issue?
A. The routing table on the gateway
B. The DNS configuration on the router
C. The pool on the DHCP server
D. The firewall on the workstation
Show Answer
Correct Answer: C
Explanation: The DHCP address pool may be exhausted, leaving the new devices without valid addresses or a default gateway. They may still communicate with one another locally, but won’t be able to reach company resources on other networks. Expanding or correcting the DHCP pool is the most likely fix.
Question 92
An administrator wants to find the top destination for traffic across the infrastructure on a specific day. Which of the following should the administrator use?
A. SNMP
B. Packet capture
C. NetFlow
D. traceroute
Show Answer
Correct Answer: C
Explanation: NetFlow records traffic-flow statistics, including source and destination addresses and traffic volume, so it can identify the top destination over a specified day.
Question 93
Which of the following Layer 1 devices is responsible for the termination of fiber-optic connections on an SFP-capable switch?
A. Transceiver
B. Modem
C. Ethernet NIC
D. Repeater
Show Answer
Correct Answer: A
Explanation: An SFP-capable switch uses an SFP transceiver module to terminate the fiber-optic connection at the physical layer. The transceiver converts optical signals to electrical signals and vice versa. A modem is for modulating/demodulating signals over carrier media, an Ethernet NIC is an endpoint network interface, and a repeater regenerates signals but is not the SFP termination device.
Question 93
Which of the following impacts the availability of a web-based customer portal?
A. MAC flooding
B. ARP spoofing
C. DoS
D. Rouge devices
Show Answer
Correct Answer: C
Explanation: A denial-of-service (DoS) attack can overwhelm the portal or its supporting services, making it unavailable to legitimate users and directly affecting availability.
Question 94
A network technician needs to use a private Class A RFC1918 addressing scheme for user laptops on the company's network. Which of the following subnets should the technician choose?
A. 10.1.1.0/24
B. 100.1.1.0/24
C. 172.16.1.0/24
D. 192.168.1.0/24
Show Answer
Correct Answer: A
Explanation: RFC 1918 private address space includes 10.0.0.0/8 (historically Class A), 172.16.0.0/12 (Class B), and 192.168.0.0/16 (Class C). The question specifically asks for a private Class A RFC1918 subnet, and 10.1.1.0/24 falls within 10.0.0.0/8. 100.1.1.0/24 is not RFC1918 private, while 172.16.1.0/24 and 192.168.1.0/24 are private but not Class A.
Question 94
Which of the following best describes the amount of time between a disruptive event and the point that affected resources need to be back to fully functional status?
A. RTO
B. MTBF
C. PRO
D. MTTR
Show Answer
Correct Answer: A
Explanation: RTO (Recovery Time Objective) is the target time after a disruptive event by which affected resources must be restored to operational status. MTTR is the average time required to repair or restore a failed system.
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