Cisco switches are often grouped together to form what are called "Stacks". This group of switches is then managable as one switch (and via 1 IP address). Those silver braided cables are the stacking cables that go from one Cisco switch to the next to create a stack. The cables actually make loop to provide redundancy. For example, in a 3-switch stack, a cable goes from sw1 to sw2, then sw2 to sw3, then from sw3 back to sw1.
That way if the cable from sw2 to sw3 were to disconnect (and this happens more that you'd like to know!), there is still a connection going in the other direction.
That way if the cable from sw2 to sw3 were to disconnect (and this happens more that you'd like to know!), there is still a connection going in the other direction.
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