Which step occurs third in the described cell phone connection sequence?

Which step occurs third in the described cell phone connection sequence?

• A. Phone listens for 5 digit code
• B. Matches system identification code
• C. Mobile transmits a registration request
• D. Base stations move the call request if a person is moving

Answer: (C)

Understanding how a phone attaches to a cellular network helps explain the sequence. When a device connects, it first tunes to a cell and listens for signals that confirm the network’s presence, including the access or code that allows entry. Next, the device and the network verify that they’re speaking the same network by exchanging and matching the system identification information. After these checks are satisfied, the phone sends a registration request to actually attach to the network and establish a session. This step is the point at which the device introduces itself to the network and requests the resources it needs to communicate, often including its identity and authentication data. Once attached, mobility comes into play. As the user moves, base stations coordinate to keep the connection active by transferring the ongoing communication to the appropriate cell without dropping the call or data session. That handoff process is what enables movement without interruption, and it occurs after the device has successfully registered and the session is in place.

Understanding how a phone attaches to a cellular network helps explain the sequence. When a device connects, it first tunes to a cell and listens for signals that confirm the network’s presence, including the access or code that allows entry. Next, the device and the network verify that they’re speaking the same network by exchanging and matching the system identification information. After these checks are satisfied, the phone sends a registration request to actually attach to the network and establish a session. This step is the point at which the device introduces itself to the network and requests the resources it needs to communicate, often including its identity and authentication data.

Once attached, mobility comes into play. As the user moves, base stations coordinate to keep the connection active by transferring the ongoing communication to the appropriate cell without dropping the call or data session. That handoff process is what enables movement without interruption, and it occurs after the device has successfully registered and the session is in place.