A system entity that requests and uses a service provided by another system entity is called a what?

A system entity that requests and uses a service provided by another system entity is called a what?

• A. Server
• B. Router
• C. Firewall
• D. Client

Answer: (D)

When a system requests and uses a service from another system, that system is the client. In client–server setups, the client initiates requests to a server, which provides the resources or services and replies with the response. The other options don’t fit this role: a router forwards data between networks, a firewall enforces security rules, and a server is the provider of services rather than the requester. So the entity described is the client, the consumer of the service.

When a system requests and uses a service from another system, that system is the client. In client–server setups, the client initiates requests to a server, which provides the resources or services and replies with the response. The other options don’t fit this role: a router forwards data between networks, a firewall enforces security rules, and a server is the provider of services rather than the requester. So the entity described is the client, the consumer of the service.