Cisco Certified Support Technician Networking (100-150): exam guide, passing score and how to prepare
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What the Cisco CCST Networking exam covers, what to check before you book, the ideas people mix up, and a simple way to prepare. Last updated .
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Before exam day: what to know about Cisco CCST Networking
The real exam is run by the provider. These are the details people look for before they book.
Source: the provider’s official page, checked on 1 November 2026. The provider can change these details at any time.
Your exam-day checklist
- Confirm the details above on the provider’s page the day you book. Formats and rules change.
- Match your name and ID. The name on your registration usually has to match your identification. Check the provider’s ID rules.
- Test your set-up early if you take the exam online: camera, microphone, internet and a clear desk. Providers publish a system test.
- Know the rules for breaks and materials before you sit. Read the candidate agreement.
- Rehearse at exam pace. Take your last practice test with a timer and no notes.
What the Cisco CCST Networking exam covers
The Cisco Certified Support Technician Networking (100-150) exam is about entry-level networking skills for support roles. Always check the provider’s official exam guide for the current objectives, fees and format.
Roles this can lead to
- Help desk or service desk technician
- Network support technician
- Field or desktop support
- Junior network operations
Easy to mix up on the Cisco CCST Networking exam
Exam questions often use two ideas that sound alike. Learn the difference once and several questions become easy.
| Pair | The key difference | How to choose |
|---|---|---|
| Switch or Router | A switch forwards frames within a local network using MAC addresses, while a router forwards packets between networks using IP addresses. | Choose a switch to connect devices on the same LAN; choose a router to connect that LAN to another network such as the internet. |
| TCP or UDP | TCP is connection-oriented and reliable with acknowledgements, while UDP is connectionless and has lower overhead with no delivery guarantee. | Choose TCP for web browsing or file transfer where every byte must arrive; choose UDP for live voice or video where speed matters more than retransmission. |
| DHCP or DNS | DHCP automatically assigns IP configuration to hosts, while DNS translates names into IP addresses. | If a device has no address, think DHCP; if it can ping an IP address but not a website name, think DNS. |
| Public IP address or Private IP address | Public addresses are routable on the internet, while private ranges (such as 192.168.0.0/16) are used inside local networks and need NAT to reach the internet. | Use a private address for internal devices behind a router; a public address is what the outside world sees for your network. |
Study notes written by us. Always check the provider’s exam guide for the current objectives.
How to prepare in four steps
- Read the official exam guideNote the domains and their weights on the provider’s page.
- Take Test 1 as a baseline50 questions in 50 minutes, no notes.
- Fix the gapsRead every explanation and keep an error log.
- Repeat to 80%Two timed tests in a row, then book the exam.
See how we explain every option
Each option in our tests has a reason: why the right answer is right and what trap each wrong option sets.
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A user's laptop shows an IPv4 address of 169.254.37.12 and cannot reach any network resources, although the cable and link light are fine. What is the most likely cause?
Illustration from the IT fundamentals topic area. An original question written for this exam’s topics, not an actual exam question.
Frequently asked questions
What is the Cisco CCST Networking exam?
The Cisco Certified Support Technician Networking (100-150) exam is about entry-level networking skills for support roles. We rate it entry level level in our guide to help you choose.
How long is the Cisco CCST Networking exam?
50 minutes. Source: the provider, checked 1 November 2026.
Who should take Cisco CCST Networking?
It suits people in or moving toward roles such as Help desk or service desk technician, Network support technician, Field or desktop support. A certificate supports an application but does not guarantee a job.
How should I prepare for Cisco CCST Networking?
Read the provider's official exam guide, take one timed practice test as a baseline, fix the topics you missed, then repeat until you reach about 80 percent twice in a row. Our Cisco CCST Networking study plan shows the pace.
Not affiliated with, endorsed by or sponsored by any certification vendor or exam body. Certification names, exam codes and product names are trademarks of their respective owners and are used only to identify the exam a practice product prepares for. Our questions are original and are not actual exam questions.