Which system provides relay services between two devices?

Which system provides relay services between two devices?

Which system provides relay services between two devices?

A.
Proxy server

B.
Gateway

C.
VPN

D.
Screening router

Explanation:
By definition a gateway is a device that relays services between two systems. One example is a gateway that connects two (or more) network segments. This gateway is used when the two networks have different protocols and the gateway has to do a protocol conversion. The gateway then provides relay services between devices in the different segments.
Incorrect Answers:
A: A Proxy Server also connects two (or more) networks segments, and acts as a single control point to perform requests on behalf of the requesting client
C: A VPN (Virtual Private Network) provides secure remote point-to-point communication. It doesn’t provide relay services.
D: A screen routing connects two (or more) network segments. It is a type of firewall, it only uses packet filters.
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