A network engineer at a multinational company is asked to purchase mobile phones for senior executives who often travel internationally.
The executives want their phones to work with wireless carriers in multiple countries when they travel.
Which of the following cellular standards should these new phones support?
A.
GSM B.
TDM C.
CDMA D.
PSTN.
A.
A network engineer at a multinational company is asked to purchase mobile phones for senior executives who often travel internationally.
The executives want their phones to work with wireless carriers in multiple countries when they travel.
Which of the following cellular standards should these new phones support?
A.
GSM
B.
TDM
C.
CDMA
D.
PSTN.
A.
The cellular standard that the new phones should support for the senior executives who often travel internationally is GSM (Global System for Mobile Communications).
GSM is the most widely used cellular standard worldwide, and it is used by more than 80% of the global mobile market. It is a digital cellular technology that uses a combination of Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA) to allocate bandwidth to mobile devices.
One of the key advantages of GSM is its international roaming capabilities. GSM networks have partnerships with other networks worldwide, enabling users to connect to available networks in other countries seamlessly, without needing to switch their SIM card. This is possible due to the use of a Subscriber Identity Module (SIM) card, which can be easily swapped with a local SIM card when traveling to another country. The SIM card stores the user's personal information and network credentials, allowing them to access the network from their mobile device.
In contrast, CDMA (Code Division Multiple Access) is a competing cellular standard that uses a different approach to allocate bandwidth to mobile devices. CDMA is less widely used compared to GSM and is primarily used in North America. CDMA devices do not use SIM cards, making it more difficult to switch carriers when traveling internationally.
TDM (Time Division Multiplexing) and PSTN (Public Switched Telephone Network) are not cellular standards. TDM is a technique used in networking to transmit multiple data streams over a single communication channel, while PSTN refers to the traditional analog telephone system that uses copper wires to transmit voice signals.
Therefore, the best choice for the mobile phones that should be purchased for senior executives who often travel internationally is GSM, as it is the most widely used and has excellent international roaming capabilities.