Which transmission technique guarantees that data packets will be received by…

Answer: Circuit switching

Explanation: Circuit switching reserves a dedicated end-to-end path before data transfer begins. Because the channel is fixed for the duration of the connection, all transmitted data follows the same route and arrives in the order it was sent.

• Dedicated path prevents packets from being routed differently, so there is no reordering caused by alternate routes.

• In packet switching, packets can take different routes or experience different delays, so they may arrive out of order unless a higher-layer protocol reorders them.

• Terms like unicast and broadcast describe addressing modes (one-to-one or one-to-many) and do not by themselves provide ordering guarantees.

• If ordered delivery is required on packet-switched networks, transport-layer protocols (for example, TCP) provide mechanisms to ensure packets are delivered in sequence.