If a campus has 12 intermediate distribution frames (IDFs), how many main distribution frames (MDFs) does this arrangement typically imply?

If a campus has 12 intermediate distribution frames (IDFs), how many main distribution frames (MDFs) does this arrangement typically imply?

• A. 0
• B. 2
• C. 1
• D. 3

Answer: (C)

Main distribution frames serve as the central aggregation point for cabling, with intermediate distribution frames distributed around the campus connecting back to the MDF. An IDF sits closer to user devices (often on a floor or in a building), and its cables are carried back to the MDF for the campus-wide backbone and core services. Because the IDFs are meant to feed into a single backbone hub, having 12 IDFs typically implies one MDF that these IDFs connect to. Only in very large setups or for redundancy would you have more than one MDF, but the standard campus arrangement centers on a single MDF.

Main distribution frames serve as the central aggregation point for cabling, with intermediate distribution frames distributed around the campus connecting back to the MDF. An IDF sits closer to user devices (often on a floor or in a building), and its cables are carried back to the MDF for the campus-wide backbone and core services. Because the IDFs are meant to feed into a single backbone hub, having 12 IDFs typically implies one MDF that these IDFs connect to. Only in very large setups or for redundancy would you have more than one MDF, but the standard campus arrangement centers on a single MDF.