When selecting which hardware switches to use throughout an enterprise campus switched network, which consideration is not relevant?

When selecting which hardware switches to use throughout an enterprise campus switched network, which consideration is not relevant?
A . whether data link layer switching based upon the MAC address is required
B . the number of shared media segments
C . which infrastructure service capabilities are required
D . whether to support Layer 3 services at the network edge

Answer: B

Explanation:

Shared media are not used in modern networks; all links are operating full-duplex Reference: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html