Description: Defense in depth is a security strategy that employs multiple defensive mechanisms to protect information and communication systems. This approach is based on the idea that by implementing several layers of security, the risk of a successful attack compromising the integrity, confidentiality, and availability of data can be significantly reduced. Each layer acts as an additional barrier, making it more difficult for attackers to access critical resources. Layers can include measures such as firewalls, intrusion detection systems, data encryption, multifactor authentication, and security policies. Defense in depth applies not only to network infrastructure but also extends to application and endpoint security. This approach is particularly relevant in the context of emerging technologies, where the interconnection of devices and the transmission of large volumes of data increase the attack surface. Implementing defense in depth allows organizations to adapt to emerging threats and protect against a variety of attack vectors, thus ensuring a safer environment for communication and information exchange.