200-901 Network Fundamentals Practice Question
A developer is writing a Python script to interact with a REST API. The script must handle HTTP responses correctly. Which two HTTP status code ranges indicate a successful request and a client error, respectively? (Choose two.)
⚠ Common exam trap
It's easy for candidates to confuse 5xx (server error) with 4xx (client error), or thinking that 3xx indicates success.
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
✓
2xx
HTTP status codes are grouped into five classes. 2xx codes indicate successful request handling, such as 200 OK. 4xx codes indicate client errors, such as 404 Not Found or 400 Bad Request. 1xx, 3xx, and 5xx represent informational, redirection, and server error responses, respectively. Therefore, the correct ranges for success and client error are 2xx and 4xx.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
2xx
Why this is correct
2xx status codes indicate success. The request was successfully received, understood, and accepted. For example, 200 OK means the request succeeded. This range is used when the client's request was valid and the server fulfilled it.
- ✗
3xx
Why it's wrong here
3xx status codes indicate redirection. The client must take additional action to complete the request, such as following a redirect. This range does not indicate success or client error; it indicates that further action is needed.
- ✗
1xx
Why it's wrong here
1xx status codes are informational. They indicate that the request was received and the server is continuing to process it. They are not used to indicate success or client error. For example, 100 Continue is used in some protocols, but it is not a final response.
- ✓
4xx
Why this is correct
4xx status codes indicate client errors. The request contains bad syntax or cannot be fulfilled by the server. For example, 404 Not Found means the resource does not exist, and 400 Bad Request means the client sent an invalid request. This range points to issues on the client side.
- ✗
5xx
Why it's wrong here
5xx status codes indicate server errors. The server failed to fulfill a valid request. For example, 500 Internal Server Error means the server encountered an unexpected condition. This range is not a client error; it is a server-side issue.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.