What are two characteristics of the distribution layer in a three-tier network architecture? (Choose two.)

What are two characteristics of the distribution layer in a three-tier network architecture? (Choose two.)
A . serves as the network aggregation point
B. provides a boundary between Layer 2 and Layer 3 communications
C. designed to meet continuous, redundant uptime requirements
D. is the backbone for the network topology
E. physical connection point for a LAN printer

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Answer: B,C