Network service each service is usually provided by a server component running on one or more computers (often a dedicated server computer offering multiple services) and accessed via a network by client components running on other devices. However, the client and server components can both be run on the same machine.

In computer networking, a network service is an application running at the network application layer and above, that provides data storage, manipulation, presentation, communication or other capability which is often implemented using a client-server or peer-to-peer architecture based on application layer network protocols.

Insecure perimeter networks are still the cause of most data breaches and one of the most important areas of your network to secure against vulnerabilities, misconfiguration, and other threats that could compromise security or availability of network services.