A computer network is a set of computers that share resources and includes nodes. Maria is using a router to receive, send and identify data. Thus, option B is correct.
A router is a device for networking that shares the networking data to the designated IP addresses and uses the same connection. The data are transmitted via the Internet.
The data that is sent, identified, and received is in the form of the data packets and are transmitted through the subnetworks. A repeater in a computer network amplifies the received signals.
Therefore, option b. the router is the correct option.
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