Which memory buffering method works best when switching frames between a 1000BASE-T port and a 100Base-T network?

The store-and-forward buffering method is the most appropriate for switching frames between a 1000BASE-T port and a 100Base-T network. This technique works by receiving the entire frame before forwarding it, allowing the switch to verify error checking information (like CRC) before making forwarding decisions.

In this scenario, store-and-forward buffering is beneficial because it can handle the differences in speed and bandwidth between the two networks. By ensuring that frames are fully received and error-checked before moving them to the slower 100Base-T network, the switch can avoid transmitting corrupted or incomplete data, thus maintaining network integrity and performance.

Moreover, in environments where devices operate at different speeds, errors can occur if frames are forwarded immediately without first being checked. This makes store-and-forward a more reliable option for managing the transition between different data rates.

Other memory buffering methods may not provide the same level of error-checking or performance optimization in this scenario, making store-and-forward the best choice for this type of network interaction.