A retail store's only fiber circuit is down. A strong cellular signal is available, and the store wants a backup path that can use it. Which medium fits the backup?
Select an answer to reveal the explanation.
Short Explanation
The fiber is cut and the phone in your pocket still has service, so use that service. A cellular modem is the backup that matches a strong cell signal. Satellite is for places with no cell service, a second fiber that was never pulled does not exist, and a wireless analyzer listens rather than carrying the store.
Full Explanation
Cellular data, through a modem or a router with a cellular interface, can fail over a site when the primary fiber is down and a cell signal is usable. The store has that signal and wants the backup to use it, so a cellular modem fits. Satellite is the wide-area option where terrestrial and cellular paths are missing. It is not required, and it is usually higher latency, when a strong cell signal is already available. A second multimode run needs fiber. The stem does not provide one. A Wi-Fi analyzer displays wireless networks. It does not become a wide-area circuit. Exam caveat: cellular throughput and data caps vary, so the backup may be sized for point-of-sale traffic rather than for full store replication. Operational check: unplug the fiber in a maintenance window, confirm the modem takes the default route, and confirm card transactions still complete. Unplug the fiber in a maintenance window and confirm card transactions still complete on the modem. Size the cellular plan for the transactions that must survive, not for a full copy of every store backup.