Which of the following is classified as a technical threat?

The classification of "sniffing and scanning of the network traffic" as a technical threat is accurate due to the nature of these activities. Technical threats usually involve the exploitation of technology or technical systems to compromise the confidentiality, integrity, or availability of data and systems.

Sniffing refers to the interception and analysis of network traffic, which can allow an attacker to gather sensitive information such as login credentials or personal data. Scanning involves probing a network to identify open ports, active services, and vulnerabilities that can be exploited. These actions require technical knowledge and tools, making them stark examples of technical threats in the realm of cybersecurity.

In contrast, other options, while they pose risks, do not inherently rely on technical exploitation in the same manner. For instance, incorrect data entry typically stems from human error rather than a technical breach, shoulder surfing is a form of visual eavesdropping that involves physical presence, and password guessing, while a vulnerability exploitation method, can often be conducted through social engineering tactics and does not necessarily require sophisticated technical skills. Thus, sniffing and scanning stands out clearly as a technical threat due to the dependence on technological means for the potential compromise of systems and data.