【Cisco】Gi 1/0/1 上的數字代表什麼意思？

chuckbales (CCNP|CCDP|CCNA-V|CMNA)

Exactly right - The first number is the chassis/switch itself, middle is basically the module number on the backplane, last number is the individual port. On a fixed configuration switch (like a 2960 with no add-on slots, no stacking support) it'll just be two numbers, Gig0/10, Fa0/5, as they don't need to differentiate between switches.
Same concept in a router, if you were to add multiple T1 modules - they'd come up as 0/1/0, 0/2/0, etc. On routers though they have the slots labeled, so you can visually see HWIC Slot 0, Slot 1, etc.

簡單來說， Gi 1/0/1 就是 Switch / Slot / Port 。