All of the following about wireless wide area networks (WWAN) are true EXCEPT:

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Multiple Choice

All of the following about wireless wide area networks (WWAN) are true EXCEPT:

Mobile networks aren’t run by one universal standard. In the real world, WWANs use multiple radio technologies (such as GSM, CDMA, LTE, and 5G), and they operate on many different frequency bands across countries. Because of these differences, devices need compatibility with multiple standards and roaming arrangements to work abroad. That’s why the idea of a single WWAN standard that guarantees handset compatibility worldwide isn’t correct. In practice, WWANs are cellular networks, organized into cells that have base station transceivers at their centers to send and receive signals with mobile devices within that cell. The SIM card in a device typically identifies the subscriber to the WWAN, enabling login, authentication, and access to service. These pieces—cellular structure and subscriber identification—are standard features of how WWANs operate. So the statement claiming a single WWAN standard ensures global compatibility doesn’t fit the observed reality, making it the exception. The other points accurately reflect common WWAN characteristics.

Mobile networks aren’t run by one universal standard. In the real world, WWANs use multiple radio technologies (such as GSM, CDMA, LTE, and 5G), and they operate on many different frequency bands across countries. Because of these differences, devices need compatibility with multiple standards and roaming arrangements to work abroad. That’s why the idea of a single WWAN standard that guarantees handset compatibility worldwide isn’t correct.

In practice, WWANs are cellular networks, organized into cells that have base station transceivers at their centers to send and receive signals with mobile devices within that cell. The SIM card in a device typically identifies the subscriber to the WWAN, enabling login, authentication, and access to service. These pieces—cellular structure and subscriber identification—are standard features of how WWANs operate.

So the statement claiming a single WWAN standard ensures global compatibility doesn’t fit the observed reality, making it the exception. The other points accurately reflect common WWAN characteristics.

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