350-601 Network Practice Question
Which TWO statements are true about Cisco ACI contracts? (Choose two)
⚠ Common exam trap
A common misconception is that ACI contracts are bidirectional by default. In reality, contracts are unidirectional from provider to consumer by default. To allow traffic in both directions, you must explicitly add a filter that permits the reverse direction. The exam often tests this distinction.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Contracts can be reused across multiple EPGs.
Cisco ACI contracts are designed as reusable policy constructs. Once a contract is defined, it can be applied to multiple EPGs (Endpoint Groups) without redefining the rules, promoting consistency and reducing administrative overhead. This reusability is a core principle of ACI's policy-based networking model.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Contracts can be reused across multiple EPGs.
Why this is correct
A contract can be applied to many EPG pairs, allowing reuse and simplified policy management.
- ✗
Contracts are unidirectional from consumer to provider.
Why it's wrong here
Contracts are directional, but they allow one-way traffic from provider to consumer (by default). Unidirectional from consumer to provider is incorrect.
- ✓
A contract can include multiple subjects.
Why this is correct
A contract can contain multiple subjects, each with its own filters, to define different types of allowed traffic.
- ✗
Subjects within a contract specify only the destination ports.
Why it's wrong here
Subjects define filters that can include source and destination ports, protocol, and other L4 parameters.
- ✗
Contracts are always bidirectional.
Why it's wrong here
Contracts are unidirectional; to allow two-way traffic, two contracts or a single contract with filters covering both directions are needed.
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