Gigabit network and one Fast Ethernet switch

HI,

If there is a network with 4 Gigabit switches (Cat5E cabling) and there is one Fast Ethernet switch. Clearly that end of the network work at speed of their switch (100). My question is if the whole network slow downs to 100Mbits/s or only part where date have to travel through slowest switch?

The slowest port /switch access does not slow down the entire network.  Same reason connecting devices to a 10/100/1000 switch.  The 10meg connection isn't slowing down the gig connection.