Hello Knaik99,
usually with SFP+ it is meant the support of either 1 GE SFP or 10GE SFP.
Some switches allow to support different types of optics or just plug and play or with an explicit configuration
Edit:
for reference
The differences between SFP and SFP+
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SFP doesn't support 10G transmission data rate that means they can't be used in the same network.
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From the price, SFP+ is a little bit more expensive than SFP.
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SFP is based on IEEE802.3 and SFF-8472 while SFP+ is based on SFF-8431.
see
http://www.sopto.com/learningcenter_learningcenter_71/the_difference_of_sfp_plus,_sfp_and_xfp.shtml
Hope to help
Giuseppe
