Final answer:
Network layer firewalls provide inbound protection for non HTTP-based services by filtering traffic on different protocols and ports, ensuring services like SMTP servers are safeguarded against attacks.
Step-by-step explanation:
Services that provide inbound protection for non HTTP-based services are commonly referred to as firewalls or more specifically, network layer firewalls. These firewalls are designed to filter traffic based on protocols and ports used by various services.
For example, a business might use a network layer firewall to protect its SMTP server, which uses TCP port 25, from unwanted inbound traffic and potential attacks.
This type of firewall inspects the incoming requests at the network level, and it can provide protection against various types of network-based attacks such as Denial of Service (DoS), hacking attempts, and other vulnerabilities that could affect the server running the non HTTP-based service.