Final answer:
All issues, including security, reliability, and standards, are considered in IoT. Engineers must also consider scientific, ethical, economic, and legal aspects when tackling large-scale problems.
Step-by-step explanation:
Concerns around the Internet of Things (IoT) encompass multiple issues, including security, reliability, and standards. Security issues in IoT are critical because these devices often collect and transmit sensitive data, which if compromised, can lead to unwanted privacy breaches or malicious use. Reliability issues are also paramount; as IoT devices become integral to critical systems, their consistent operation becomes a non-negotiable demand. Lastly, the standard issues pertain to the lack of uniform protocols and communication standards across different devices, which can impede interoperability and integration. Therefore, the correct answer to the question is 4) All issues are considered in IoT.
When engineers are looking at large-scale problems, they should focus on various aspects, including the scientific, ethical, economic, and legal aspects. A comprehensive approach to problem-solving in engineering integrates these considerations to ensure a balanced and holistic solution.