You are a cybersecurity consultant for a smart city project. The project involves deploying a vast network of IoT devices for public utilities like traffic control, water supply, and power grid manage

Regular firmware updates address vulnerabilities that could lead to devices being compromised and used in a DDoS attack, but they do not directly detect or mitigate an active or incoming distributed denial of service attack targeting the services.

Strong, unique passwords prevent unauthorized access and compromise of individual devices, thereby reducing their potential for being enlisted into a botnet, but they do not directly prevent or mitigate an incoming DDoS attack launched by external sources against the services.

Network Intrusion Detection Systems (IDS) monitor network traffic for malicious activity and anomalies, including patterns indicative of a DDoS attack like unusual traffic volumes or specific attack signatures. Early detection by an IDS is critical as it enables timely response and activation of countermeasures, such as traffic filtering or rate limiting, before the critical IoT services are overwhelmed and crippled by the attack.

IP address whitelisting restricts network access to only approved sources, but it is not an effective primary defense against a DDoS attack which often involves overwhelming traffic from many diverse or spoofed IP addresses, even potentially from whitelisted but compromised sources.