Which type of traffic is actively injected into a LAN to conduct active sniffing?

Which type of traffic is actively injected into a LAN to conduct active sniffing?

• A. TCP packets
• B. UDP packets
• C. ARP traffic
• D. ICMP packets

Answer: (C)

The correct answer is ARP traffic because Address Resolution Protocol (ARP) is specifically designed to resolve IP addresses to MAC addresses within a local area network (LAN). Active sniffing involves intercepting network traffic by injecting packets that can manipulate the flow of communications between devices. When an attacker injects ARP packets into the network, they can exploit the trust-based nature of ARP. For instance, by sending forged ARP replies, the attacker can trick devices into sending their traffic to the attacker's machine instead of the intended destination. This allows the attacker to capture and analyze the data being transmitted across the network, facilitating unauthorized access to sensitive information. On the other hand, while TCP, UDP, and ICMP packets are key protocols used for communication in networks, they are not primarily associated with the active sniffing technique described. Injecting these types of packets typically does not exploit ARP’s trust model, which is central to enabling a successful active sniffing attack.

The correct answer is ARP traffic because Address Resolution Protocol (ARP) is specifically designed to resolve IP addresses to MAC addresses within a local area network (LAN). Active sniffing involves intercepting network traffic by injecting packets that can manipulate the flow of communications between devices.

When an attacker injects ARP packets into the network, they can exploit the trust-based nature of ARP. For instance, by sending forged ARP replies, the attacker can trick devices into sending their traffic to the attacker's machine instead of the intended destination. This allows the attacker to capture and analyze the data being transmitted across the network, facilitating unauthorized access to sensitive information.

On the other hand, while TCP, UDP, and ICMP packets are key protocols used for communication in networks, they are not primarily associated with the active sniffing technique described. Injecting these types of packets typically does not exploit ARP’s trust model, which is central to enabling a successful active sniffing attack.