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.
John indicates that he cannot edit the file Test.docx, which is stored on a network shared drive. John can access and edit other files on the shared drive. You review permissions for the file and see the permissions shown in the following screenshot.
Which change will allow John to access and edit the Test.docx file, while retaining account-level control?
The screenshot shows that John Douglas is explicitly denied 'Read & execute' permissions on the file Test.docx, which overrides any inherited allow permissions. To allow John to edit the file, you must modify the NTFS permissions on the file and remove or change the Deny rule that applies to his account. Simply allowing 'read & execute' would not be enough; you must grant 'Modify' or higher and remove the Deny.
You are working from home over a weekend to resolve a backlog of employee help desk tickets. A user issue requires you to access their Windows 11 computer in the home office to check its settings. You have verified that the machine is available, but the user is not present.
Which remote access application is best suited for this task?
An office uses a DHCP server for all computers on the network. A user calls to report problems connecting to the network. You discover that the computer has been configured with a manual IP address.
Which two possible negative effects could this have? (Choose two.)
Note: You will receive partial credit for each correct selection.
A manually assigned IP can conflict with the DHCP pool, causing another device that the DHCP server assigns the same address to lose connectivity.
If the static IP is outside the correct subnet or doesn't match the network's gateway/DNS settings, the PC may be unable to communicate on the network.
You receive an email from a user with the display name of the President of your company. The email requests that you do them a favor and purchase gift cards and send the gift cards to an email address provided.
What should you do?
This scenario is a classic example of email spoofing and a social engineering attack. You should contact the IT department immediately using internal communication methods to verify the legitimacy of the request. Never respond or take action based on suspicious emails.
What is the primary purpose of implementing a Mobile Device Management (MDM) solution in an enterprise environment?
MDM solutions let IT enforce security policies --- such as requiring device encryption, up-to-date OS versions, PIN/passcode rules, and approved apps --- before allowing mobile devices to connect to corporate networks or access company data.
