The Cisco 100-140 exam validates the skills and knowledge required for IT support professionals pursuing the Cisco Certified Support Technician (CCST) IT Support certification. This exam is designed for candidates who provide frontline technical support, troubleshoot hardware and connectivity issues, and help resolve operating system and application problems. This landing page outlines the exam structure, core topics, and preparation strategies to help you study effectively and build confidence before test day. Whether you are new to IT support or advancing your credentials within the Cisco Certified Support Technicians program, understanding the exam scope and question types is essential for success.
Use this topic map to guide your study for Cisco 100-140 (Cisco Certified Support Technician (CCST) IT Support) within the Cisco Certified Support Technicians path.
The 100-140 exam uses multiple question types to assess both foundational knowledge and practical decision-making. Questions progress in difficulty and reflect real-world scenarios that support technicians encounter daily.
Questions reward practical reasoning over memorization, and difficulty increases as you demonstrate mastery of foundational concepts.
An effective study plan breaks the exam into manageable weekly topics, combines reading with hands-on practice, and includes timed mock assessments. Allocate more time to areas where you have less real-world experience, and regularly review connections between topics to build a holistic understanding of IT support workflows.
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Connectivity and Resource Access Issues, Operating System and Application Issues, and Common Threats and Prevention typically represent larger portions of the exam. However, all six domains are important; focus on breadth first, then deepen your knowledge in areas where you lack hands-on experience.
Support technicians use job task frameworks to document and escalate connectivity problems systematically. Understanding ticketing workflows, communication protocols, and escalation paths helps you troubleshoot more efficiently and know when to involve network specialists rather than attempting fixes beyond your scope.
Six months to one year of entry-level IT support experience is ideal but not mandatory. If you lack hands-on exposure, prioritize labs and simulations for hardware diagnostics, network troubleshooting, and OS configuration. Practice tests with scenario-based questions can also bridge knowledge gaps.
Candidates often confuse similar troubleshooting steps, overlook security implications in support decisions, or rush through scenario-based items without fully reading the symptoms. Slow down on multi-step questions, re-read the scenario before selecting an answer, and always consider both technical and security aspects of a solution.
In your final week, take one full-length timed practice test to assess readiness and identify remaining weak areas. Spend the remaining days reviewing those specific topics, reviewing high-level workflows, and doing a final review of definitions and key concepts. Avoid cramming new material; instead, reinforce what you already know.
A user needs assistance configuring Microsoft Teams so that it will start automatically.
Which category in Teams should the user select to set the application to auto-start?
The auto-start option for Teams is found under Settings > General, where you can toggle ''Auto-start application'' to have Teams launch when you sign in.
A user needs to reset their password based on feedback after a security concern.
You want to provide an example of a strong password to the user based on the following company guidelines shown:
Must have 8 to 15 characters
Must contain lowercase letters
Must contain at least 2 numbers
Must begin and end with a letter
Only special characters that can be used dash (-), underscore (_), hashtag (#), and at sign (@)
Which password could you use as an example?
mkn546#f is 8 characters long (within 8--15), begins with ''m'' and ends with ''f'' (letters), includes only lowercase letters, contains three numbers (5, 4, 6), and uses only the allowed special character ''#.''
A user who has been on vacation for the past 30 days calls the help desk and reaches you. The user reports the following:
Before I left for vacation, I changed my password and made sure it worked. My password is not due to be reset for another 60 days, but I can't log in to the network.
While the user was gone, the company established a requirement for Multi-Factor Authentication (MFA).
Which two actions could you take to resolve the problem? (Choose two.)
Note: Each correct answer presents a complete solution.
Installing the company's authenticator app enrolls the user in MFA as now required.
Adding a phone number enables SMS-based second-factor validation.
An employee is having problems reaching URLs on the World Wide Web. You examine the addressing configuration for the employee's PC that is shown as follows:

You have verified that you can open a website on the employee's PC by entering the website's IP address in their browser.
Which IP address should you ping to determine what the problem is?
Since you can access websites by IP but not by name, the issue lies with name resolution. Pinging the configured DNS server (192.168.1.254) will verify whether the DNS service is reachable and functioning.
A user reports the following:
I recently got a prompt on my Mac to give an app permissions. I accidentally clicked Deny. Now I can't open the app.
You need to tell the user where to go to grant the necessary permissions to the application.
Which feature should they use?
On macOS, you grant or revoke app permissions in the System Settings under ''Privacy and Security,'' where you can enable access for the denied app.