Which of the following is a recommended practice of a data center core?

Question

Options

• AServer-to-server traffic always remains in the core layer.
• BThe core infrastructure should be in Layer 3.
• CCore layer should run BGP along with an IGP because iBGP has a lower administrative distance
• DThe Cisco Express Forwarding hashing algorithm is the default, based on the IP address and

• A
  2% (1)
• B
  88% (36)
• C
  2% (1)
• D
  7% (3)

Explanation

In data center design, the core layer should operate at Layer 3 (network layer). This is a fundamental best practice because a routed (Layer 3) core avoids Spanning Tree Protocol (STP) issues, enables faster convergence, supports Equal-Cost Multi-Path (ECMP) load balancing, and scales more efficiently than a bridged core. Option A is incorrect because server-to-server (east-west) traffic is typically handled at the aggregation or access layer, not forced through the core. Option C is incorrect because running iBGP alongside an IGP in the core is not a standard recommendation - iBGP actually has a higher administrative distance (200) than IGPs like OSPF (110), not lower. Option D is an incomplete statement and describes a CEF default behavior, not a recommended practice.

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