Editing Cisco IOS (section)

== Interface descriptor block ==
An Interface Descriptor Block, or simply IDB, is a portion of memory or Cisco IOS internal data structure that contains information such as the IP address, interface state, and packet statistics for networking data. Cisco's IOS software maintains one IDB for each hardware interface in a particular Cisco switch or router and one IDB for each subinterface. The number of IDBs present in a system varies with the Cisco hardware platform type.

Physical and logical interfaces on the switch will be referenced with either expanded or abbreviated port description names. This combined with slot, module, and interface numbering creates a unique reference to that interface.

{| class="wikitable sortable"
|+ Interface Identifiers
|-
! Expanded !! Abbreviated 
|-
| TwoHundredGigabitEthernet || TH
|-
| HundredGigabitEthernet || Hu
|-
| FortyGigabitEthernet || Fo
|-
| TwentyFiveGigE || Twe
|-
| TenGigabitEthernet || Te
|-
| FiveGigabitEthernet || Fi
|-
| TwoGigabitEthernet || Tw
|-
| GigabitEthernet || Gi
|-
| FastEthernet || Fa
|-
| Port-channel || Po
|-
| AppGigabitEthernet || Ap
|}