Which attack method utilizes crafting packets to manipulate network communication?

Packet injection is a technique where an attacker crafts and sends packets over a network in order to manipulate communication between devices or disrupt normal operations. This method allows the attacker to insert malicious data into the network traffic, which can be used to exploit vulnerabilities in the communication protocols being utilized. By modifying packet contents, attackers can create conditions that may lead to denial-of-service attacks, unauthorized access, or data interception.

In contrast, phishing involves deceiving individuals to gain access to sensitive information, often through fraudulent emails or websites. Packet sniffing refers to the practice of intercepting and logging traffic that flows through a network but does not inherently involve the manipulation of that traffic. Brute force attacks are a method of gaining unauthorized access by attempting numerous combinations of passwords until the correct one is found, which does not involve crafting packets or manipulating network communication. Thus, packet injection stands out as the unique method tailored for actively altering network communications.