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Which switching technology can be used to solve reliability problems in a switched network?
Correct Answer: D
Explanation/Reference: Explanation: Characteristics of Store-and-Forward Ethernet Switching This section provides an overview of the functions and features of store-and-forward Ethernet switches. Error Checking Figure 1 shows a store-and-forward switch receiving an Ethernet frame in its entirety. At the end of that frame, the switch will compare the last field of the datagram against its own frame-check- sequence (FCS) calculations, to help ensure that the packet is free of physical and data-link errors. The switch then performs the forwarding process. Whereas a store-and-forward switch solves reliability issues by dropping invalid packets, cut- through devices forward them because they do not get a chance to evaluate the FCS before transmitting the packet. Figure 1. Ethernet Frame Entering a Store-and-Forward Bridge or Switch (from Left to Right) Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-5020-switch/ white_paper_c11-465436.html