Question a Roaming and Handoff Roaming is when a mobile unit moves from one cell to another and possibly from one company's service area into another company's service area. Handoff or Handover is the transfer of a mobile unit from one base station's control to another base station's control. Explain in details how can each of them be accomplished.

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Uplink and Downlink Segment

The uplink and the downlink are the terminologies that are used in the satellite communications. The data when sent from the ground to the satellite is called the uplink and data when sent from satellite to ground is called downlink. The uplink and the downlink process goes in parallel and this is also a two way communication.