Answer:
The answer is "Option A".
Step-by-step explanation:
The technique of switching is more often a single way to data transfer between recipient to sender, which may occur in large organizations. It uses the Ether channel, that provides port links, it is also called the selection of a pathway, which data will follow from existing options, and other alternative were wrong, which can be defined as follows:
- In option B, It is used in routing, for token-ring network, that's why it is wrong.
- In option C, The port Fast is used in STP, that's why it is wrong.
- In option D, It is used in VLAN to manage switches, that's why it is wrong.