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what is the difference between line card and fc module in cisco mds switches? for example say 16 port fc module can have how many line cards? does the line card also needs to be 16 port or can we have 4 line cards each having 4 ports. Also one MDS switch can have how many FC modules and how many line cards. Also for switch interface what does fc 1/1 and fc 2/3 means.  Thanks.
. Cisco line cards and fc modules