The correct answer is that the color attribute identifies a specific SR-TE policy to be used for traffic steering. In Segment Routing Traffic Engineering, the color attribute acts as a distinguishing label that allows the network to select among multiple candidate paths or policies that lead to the same destination endpoint, enabling flexible traffic steering based on service requirements such as low latency or high bandwidth. On the Cisco SPCOR / CCNP Service Provider Core 350-501 exam, this concept often appears in JSON policy exhibits where you must differentiate color from other attributes like preference, affinity constraints, or metric type—a common trap is confusing color with preference, but remember that preference determines priority among policies with the same color, while color itself is the primary key for steering traffic to a specific policy. A useful memory tip: think of the color attribute as the “traffic lane marker” that tells packets which path to take, while preference is the “tiebreaker” when multiple lanes share the same color.
350-501 Architecture Practice Question
This 350-501 practice question tests your understanding of architecture. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It identifies a specific SR-TE policy to be used for traffic steering
The color attribute distinguishes between multiple paths to the same destination. Option B is correct. Option A is wrong because preference is separate. Option C is wrong because affinity constraints are under constraints. Option D is wrong because color does not set metric type.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
It sets the metric type for the path calculation
Why it's wrong here
Metric type (e.g., IGP, TE) is separate from color.
✗
It defines the preference value for the candidate path
Why it's wrong here
Preference is defined under candidate-paths, not color.
✓
It identifies a specific SR-TE policy to be used for traffic steering
Why this is correct
Color is used to match traffic via color-based forwarding.
Related concept
Static NAT maps one inside address to one outside address.
✗
It specifies the link affinity constraint for the path
Why it's wrong here
Link affinity is specified under constraints, not color.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-501 NAT questions on configuration and troubleshooting.
Architecture — This question tests Architecture — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: It identifies a specific SR-TE policy to be used for traffic steering — The color attribute distinguishes between multiple paths to the same destination. Option B is correct. Option A is wrong because preference is separate. Option C is wrong because affinity constraints are under constraints. Option D is wrong because color does not set metric type.
What should I do if I get this 350-501 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-501 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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