Question 40

A modem serves as a connection between the customer network and the internet service provider.

A modem is a critical device that enables communication between a home or office network and the broader internet. It modulates and demodulates signals for data transmission, effectively bridging the user's local network with the internet service provider.

A) Serves as a connection between the customer network and the internet service provider

This option accurately describes the primary function of a modem. By connecting the local network to the internet service provider, the modem facilitates access to online resources, making it essential for internet connectivity.

B) Provides a barrier between a trusted private network and an untrusted network

This option describes the function of a firewall, not a modem. While security is important in networking, a modem's role is specifically to connect networks rather than to provide security barriers.

C) Manages traffic by maintaining a table of known devices on the network

This option pertains to the functions of a router or a network switch rather than a modem. A modem does not manage network traffic or maintain records of connected devices; its primary role is to connect to the internet.

D) Provides services, such as website hosting and routing, for various devices

While some devices can provide hosting and routing services, this is not the function of a modem. Modems do not host websites or manage the routing of data; their main job is to connect to the internet service provider.

Conclusion

The correct answer, A, is definitively right as it directly reflects the primary purpose of a modem in a network setup. All other options misrepresent the functions of networking devices, highlighting that a modem specifically facilitates the connection to the internet service provider without engaging in traffic management or security roles.