A Virtual LAN segments the network into separate broadcast domains on the same physical infrastructure, allowing you to isolate voice traffic on its own voice VLAN while using existing switches.

The correct answer is B. Network. In the OSI model, packets are the protocol data unit associated with Layer
3, which is the Network layer. This is the layer where logical addressing and routing functions take place, and it is the layer most closely associated with devices such as routers and Layer 3 switches.
The question is specifically asking about troubleshooting an issue related to packets, not frames, segments, or bits. That wording matters because each OSI layer has its own PDU name. Transport uses segments, Data Link uses frames, and Physical deals with bits and the actual transmission medium. Since packets belong to Layer 3, the technician would most likely be interacting with devices and functions at the Network layer.
This is a common CompTIA style concept check. Students are expected to know the mapping between OSI layers and PDUs, along with the kinds of devices that operate at each layer. When the problem involves routing paths, IP addresses, or packets moving between networks, the best answer is usually the Network layer. That is why B is correct.

See explanation below.
Explanation:
On the first exhibit, the layout should be as follows
A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.
A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.

Exhibit 2 as follows
Access Point Name AP2
A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.
A screenshot of a computer AI-generated content may be incorrect.
Exhibit 3 as follows
Access Point Name AP3
A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.

VLAN hopping is an attack where an attacker crafts packets with multiple VLAN tags, allowing them to traverse VLAN boundaries improperly. This can result in gaining unauthorized access to network segments that are supposed to be isolated. The other options do not involve the use of multiple network tags. MAC flooding aims to overwhelm a switch's MAC address table, DNS spoofing involves forging DNS responses, and ARP poisoning involves sending fake ARP messages.

An Intrusion Detection System (IDS) monitors and analyzes traffic to detect suspicious activity but does not sit in the traffic path, meaning it doesn't affect latency. In contrast, an IPS is in-line and can introduce delay.
From Andrew Ramdayal's guide:
"IDS monitors and alerts on malicious activity but does not block traffic, making it suitable for environments where low latency is critical."