SVGS and mouseovers

I created an SVG, the hexagons are links.
http://lukesspot.com/indus_links/SVG/system_169.html
Is there a way to create a hover effect on many of the SVG elements (3 s, 4 s, etc) so people can easily see the connections between routers? One way (hopefully) is to create an invisible shape and make sure it encompasses any or etc

<rect width="512" height="48" x="49" y="201" fill="transparent" stroke="none"/>

then use CSS to provide a hover effect, like change the stroke color to blue, kind of like the hover effect on the line,
http://lukesspot.com/indus_links/SVG/

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