100-150 Practice Test 8 — 10 Questions

Question 1

An administrator is configuring Power over Ethernet on an enterprise access switch to power IP security cameras requiring up to 25.5 watts of power each. Which IEEE standard must the switch ports support?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

IEEE 802.3at delivering up to 30 watts of direct current power per individual port interface.. IEEE 802.3at (PoE+) delivers up to 30 watts of DC power per port, which comfortably exceeds the 25.5-watt requirement of the IP cameras. This standard uses two pairs of Cat5e or better cabling to provide the higher power budget while maintaining backward compatibility with 802.3af devices. The switch port must support 802.3at to guarantee sufficient power for each camera without overloading the power budget.

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IEEE 802.3af delivering a maximum of 15.4 watts of direct current power per individual port interface.

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IEEE 802.3bt Type 3 delivering up to 60 watts of power across all four wire pairs within the structured copper cable.

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IEEE 802.3ab defining Gigabit Ethernet physical layer transmission parameters over copper infrastructure.

Question 2

A technician is installing a new 10GBASE-T network card in a server and needs to select the appropriate copper cabling. Which cable category is the minimum requirement to support 10 Gbps speeds at a distance of 100 meters?

Accepted Answer

Category 6a. 10GBASE-T over copper requires Category 6a (augmented Cat 6) to reliably achieve 10 Gbps at the full 100-meter channel length. Cat 6a is specified to 500 MHz and is designed to handle the higher alien crosstalk and signal-to-noise requirements of 10GBASE-T. Cat 6 can only support 10GBASE-T up to about 55 meters, not 100 meters.

Answer

Category 5e

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Category 6

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Category 3

Question 3

A network engineer is migrating a network to IPv6 to solve address exhaustion. Which feature of IPv6 eliminates the need for broadcasting to discover MAC addresses on a local link?

Accepted Answer

NDP. IPv6 Neighbor Discovery Protocol (NDP) replaces ARP and uses ICMPv6 messages (Neighbor Solicitation and Neighbor Advertisement) to resolve IPv6 addresses to MAC addresses on a local link. NDP eliminates the need for broadcasting because it uses multicast addresses (solicited-node multicast) to efficiently discover neighbors, making it the correct answer.

Answer

NAT

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ARP

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DHCPv6

Question 4

A network administrator needs to connect a workstation to a Cisco switch. Which cabling standard and medium should be utilized to ensure full-duplex communication while preventing collision domains?

Accepted Answer

Category 6 twisted-pair cable with full-duplex settings. Category 6 twisted-pair cable with full-duplex settings is the correct combination because modern Ethernet switches support full-duplex on twisted-pair, which eliminates collisions by providing separate transmit and receive paths on different wire pairs. Cat 6 supports gigabit speeds at 100 meters and is the appropriate medium for a workstation-to-switch connection. Full-duplex operation removes the collision domain entirely on that link.

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Coaxial cable with half-duplex settings

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Fiber optic cable with half-duplex settings

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Category 3 twisted-pair cable with full-duplex settings

Question 5

A technician can successfully ping local servers on the same 192.168.10.0/24 subnet but cannot reach any resources on a different VLAN or the Internet. The technician verifies the local IP address and subnet mask are correct. Which component is the most likely source of the connectivity failure?

Accepted Answer

Misconfigured default gateway. Successful communication within a local subnet proves that the Network Interface Card and local switching are functional. However, the inability to reach remote networks typically indicates a configuration error regarding the default gateway. Technicians must verify that the gateway address resides on the local subnet and that the router is actively forwarding traffic for that specific VLAN.

Answer

Incorrect DNS server

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Duplicate IP address

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Faulty Cat6 cabling

Question 6

A junior technician is organizing a box of fiber optic patch cords. Which TWO connector types are commonly used to terminate modern fiber optic media? (Choose TWO.)

Accepted Answer

LC (Lucent Connector). Identifying physical connectors is a fundamental skill for network support technicians working with fiber infrastructure. LC and SC connectors are the industry standards for most enterprise networking equipment. Knowledge of these connectors prevents damage to SFP modules and patch panels that may occur if a technician attempts to force an incompatible physical connection.

Answer

RJ-45

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BNC

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F-type

Question 7

Refer to the exhibit. A company applies this JSON security policy to its edge firewall. What is the primary standard or concept being enforced by this configuration?

Accepted Answer

Confidentiality. This policy demonstrates the enforcement of secure web communication standards. By denying traffic on port 80 (HTTP) and allowing traffic on port 443 (HTTPS), the organization ensures that all web data is encrypted during transit. This is a fundamental security practice to protect sensitive information from being intercepted by unauthorized parties.

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Data Integrity

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Availability

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Physical Security

Question 8

Which TWO of the following statements regarding IPv4 address types are true?

Accepted Answer

Public IP addresses are globally routable across the internet.. Understanding the distinction between private, public, and special-use IPv4 addresses is critical for network security and traffic routing. Private addresses allow internal segmentation without internet visibility, while special addresses like the loopback range are essential for local service testing. Mastering these types prevents common errors like NAT misconfiguration or routing traffic into non-existent or internal-only address blocks across the network infrastructure.

Answer

Private IP addresses can be routed directly across the public internet.

Answer

The 127.0.0.0/8 range is used for private internal communication.

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All IPv4 addresses are assigned automatically by the ISP.

Question 9

Refer to the exhibit. A technician is troubleshooting a connection between a Cisco switch and a server. Based on the output, what is the most likely cause of the 'line protocol is down' status?

Accepted Answer

A duplex or speed mismatch exists.. In Cisco IOS, the status 'up/down' typically indicates a Layer 2 framing or configuration mismatch rather than a physical break. While the physical layer is active, the line protocol fails due to issues like duplex mismatches, encapsulation errors, or keepalive failures. Identifying this distinction allows technicians to focus on software configuration rather than replacing hardware.

Answer

The physical cable is disconnected.

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The switch port has been administratively disabled.

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The MAC address on the server is incorrect.

Question 10

Which primary benefit does the implementation of VLANs provide to a corporate network infrastructure?

Accepted Answer

Reduction of broadcast domain size. VLANs divide a single physical switch into multiple logical broadcast domains. This segmentation reduces the size of broadcast domains, which minimizes unnecessary traffic processing on end devices and improves overall network stability. By grouping devices logically rather than physically, administrators gain greater control over resource access and improve security by isolating traffic between different departments or functional roles.

Answer

Increased physical cabling requirements

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Automatic encryption of all traffic

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Elimination of the need for routers