The correct answer is A. Cloud initiated communication.
Cloud initiated communication is not a correct way to secure communication layer because it is not a security measure. It is a way to deliver content to users, but it does not provide any protection against unauthorized access or malicious attacks.
TLS/SSL, IPS, and firewalls are all security measures that can be used to secure communication layers. TLS/SSL is a cryptographic protocol that provides end-to-end security for data transmitted over a network. IPS is a system that monitors network traffic for suspicious activity and blocks it if necessary. Firewalls are devices that control access to a computer or network.
Cloud initiated communication is a way to deliver content to users. It does not provide any protection against unauthorized access or malicious attacks. Therefore, it is not a correct way to secure communication layer.
TLS/SSL is a cryptographic protocol that provides end-to-end security for data transmitted over a network. It is used to secure communication between web browsers and web servers, as well as between other applications that need to communicate securely. TLS/SSL works by encrypting the data that is transmitted over the network. This makes it difficult for anyone who intercepts the data to read it.
IPS is a system that monitors network traffic for suspicious activity and blocks it if necessary. IPS systems can be used to protect against a variety of attacks, including denial-of-service attacks, SQL injection attacks, and cross-site scripting attacks.
Firewalls are devices that control access to a computer or network. They can be used to block unauthorized access to a computer or network, as well as to filter traffic that is allowed to pass through the firewall. Firewalls can be either software-based or hardware-based.