Which option is the Cisco recommendation for data oversubscription for access ports on the access-to-distribution uplink?

Question

Options

• A4 to 1
• B20 to 1
• C16 to 1
• D10 to 1

• A
  8% (3)
• B
  87% (34)
• C
  3% (1)
• D
  3% (1)

Explanation

Cisco's recommended oversubscription ratio for access-to-distribution uplinks is 20:1 (B). This means up to 20 access layer ports can share a single uplink's worth of bandwidth. This ratio balances cost-efficiency with acceptable performance for typical enterprise access layer traffic patterns, where not all users transmit at line rate simultaneously. Higher ratios like 20:1 are appropriate for general user access, while lower ratios (e.g., 4:1 or less) would be reserved for more bandwidth-sensitive uplinks like distribution-to-core.

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