CAT5 is in theory only rated for Fast Ethernet (100M) while CAT5e is rated for Gigabit Ethernet. In practice is very hard to actually find a cable that meets on

CAT5 is in theory only rated for Fast Ethernet (100M) while CAT5e is rated for Gigabit Ethernet. In practice is very hard to actually find a cable that meets only CAT5 and not CAT5e.