One defense mechanism may be relatively easy for an attacker to circumvent. Instead, a security system must have layers, making it unlikely that an attacker has the tools and skills to break through all the layers of defenses.
Phishing scams can be be delivered in multiple ways and can be generalized for an entire organized or specifically aimed at one person. Please conduct a web search and write at least 2 paragraphs that describes the multiple methods of delivering a phishing scam and a provide a multi-layered defense to combat the phishing scam described.