Cisco 100-150 Exam Dumps – [May 2026 Update]

Key Takeaway: The Cisco 100-150 is the CCST Networking (Cisco Certified Support Technician — Networking) exam, Cisco’s entry-level networking credential. It contains 40–50 multiple-choice and drag-and-drop questions, lasts 50 minutes, costs $125 USD, and requires 70% to pass. It is designed for students and beginners entering networking and is the official first step on the Cisco certification path toward CCNA (200-301). The exam covers six domains: Standards and Concepts, Addressing and Subnet Formats, Endpoints and Media Types, Infrastructure, Diagnosing Problems, and Security. Both in-person and online testing are available.

Where 100-150 Fits in the Cisco Certification Path

The 100-150 CCST Networking is Cisco’s entry-level credential, designed specifically for students, beginners, and help desk professionals who are starting a networking career. Understanding where it sits in the overall Cisco path shapes how you should use it.

The CCST Networking is the only Cisco certification designed specifically for secondary and post-secondary students. It validates foundational networking knowledge without requiring prior IT work experience. Many CCST candidates are studying networking for the first time and using this credential to confirm their readiness before investing the time and money required for CCNA.

The 100-150 does not replace or count toward CCNA. It is a standalone credential that demonstrates entry-level readiness. Candidates who pass CCST should expect to spend a further 2–4 months preparing before sitting the CCNA (200-301) exam.

What Is the CCST Networking Exam?

The 100-150 CCST Networking validates foundational knowledge of how networks operate — the devices, media, protocols, and concepts that enable communication between network endpoints. It is intended for candidates with limited or no prior networking experience.

What Are the Six CCST Networking Domains?

Domain 1: Standards and Concepts

Standards and concepts covers the foundational frameworks that define how networks are designed and how devices communicate. Topics include the OSI model and its seven layers, the TCP/IP model and its four layers, standard protocols at each layer (Ethernet at Layer 2, IP at Layer 3, TCP/UDP at Layer 4, HTTP/DNS/DHCP at the application layer), how protocols interact within and between layers, and how networking standards ensure interoperability between devices from different manufacturers.

OSI layer identification is the most frequently tested topic in this domain. The exam presents a scenario — a web browser sends an HTTP request that travels across a network — and asks which OSI layer is responsible for each part of the process. Getting the layer mapping right requires understanding what each layer does functionally, not just its name. Candidates who memorize layer names without understanding layer responsibilities answer these questions incorrectly.

Domain 2: Addressing and Subnet Formats

Addressing and subnet formats covers IPv4 and IPv6 addressing, subnet masks, CIDR notation, and basic subnetting. Topics include the structure of an IPv4 address (32-bit, dotted decimal), address classes (A, B, C), public versus private address ranges (RFC 1918), how subnet masks define the network and host portions of an address, CIDR notation as shorthand for subnet masks, and basic calculations to determine the number of hosts per subnet.

IPv4 subnetting is the most directly practical topic in this domain. The exam tests whether candidates can determine the network address, broadcast address, and valid host range for a given IP address and subnet mask. This is not a theoretical exercise — it is a skill that network support technicians use when troubleshooting connectivity issues. Candidates who practice subnetting until it is automatic gain confidence across multiple exam domains because addressing knowledge connects to Infrastructure and Diagnosing Problems scenarios.

IPv6 addressing at the CCST level is introductory — recognize the 128-bit format, understand the abbreviated notation rules, and know that IPv6 uses a different address architecture than IPv4. Full IPv6 configuration is not tested at this level.

Domain 3: Endpoints and Media Types

Endpoints and media types covers the physical and logical components that connect to and form a network. Topics include endpoint types (computers, servers, smartphones, printers, IoT devices), wired media types (Category 5e/6/6A copper Ethernet cable, fiber optic single-mode and multi-mode), wireless media (802.11 standards), cable connector types (RJ-45 for copper, LC/SC for fiber), cable testing tools, and how each media type’s characteristics affect distance, speed, and interference.

Copper versus fiber selection scenarios test practical understanding. Given a scenario — a network link requires 10 Gbps over 400 meters with no interference from electrical equipment — candidates must identify that fiber optic is required because copper Ethernet has a 100-meter maximum distance at Gigabit speeds and is susceptible to electromagnetic interference. The exam tests the selection decision, not just the media definitions.

Domain 4: Infrastructure

Infrastructure covers the core network devices and how they work together. Topics include switch functions (Layer 2 forwarding, MAC address tables, VLANs), router functions (Layer 3 forwarding, routing tables, default gateways), firewall functions (traffic filtering, access control), how switches, routers, and firewalls are positioned within a network, and how traffic flows between devices in a typical network topology.

Key Takeaway: The default gateway concept is one of the most consistently tested Infrastructure topics. When a device needs to communicate with an address outside its own subnet, it sends traffic to its default gateway — typically the router’s interface on the local subnet. The exam tests this in failure scenarios: a workstation can reach local devices but not the internet. The correct diagnosis is a misconfigured or unreachable default gateway. Candidates who understand why the default gateway matters, not just what it is, answer these diagnostic questions correctly.

Switch MAC address table behavior is also specifically tested. Switches forward frames based on destination MAC addresses learned from incoming traffic. The exam tests how a switch handles a frame whose destination MAC is not yet in its table (it floods the frame out all ports except the incoming port) and how a switch learns MAC addresses (from the source MAC field of incoming frames).

Domain 5: Diagnosing Problems

Diagnosing problems covers the troubleshooting methodology and tools that network support technicians use to identify and resolve connectivity issues. Topics include the OSI-layer-based troubleshooting approach (start from physical and work up, or from application and work down), ping and traceroute/tracert as primary connectivity testing tools, the Cisco IOS show commands (show run, show ip interface brief, show ip route, show mac address-table, show cdp neighbors, show version, show interface status), interpreting command output to identify the source of a problem, and structured troubleshooting methodology.

The show commands are explicitly listed in the CCST Networking exam objectives and are specifically testable. The exam presents command output — a show ip interface brief with some interfaces administratively down — and asks what this indicates and what action should be taken. Recognizing what normal and abnormal output looks like for each show command requires either lab practice or deliberate study of sample command outputs.

Ping and traceroute interpretation is the most practical troubleshooting skill at this level. Ping tests end-to-end connectivity and measures round-trip time. Traceroute identifies where in the path a packet stops reaching its destination. The exam tests interpreting the output of both tools in failure scenarios.

Domain 6: Security

Security covers fundamental network security concepts that every support technician needs to understand. Topics include the CIA triad (Confidentiality, Integrity, Availability), authentication, authorization, and accounting (AAA), multi-factor authentication (MFA), encryption and certificate concepts, common threats and vulnerabilities (phishing, malware, spam, denial of service), Active Directory as an identity store, and basic wireless security configuration including WPA, WPA2, and WPA3.

WPA2 versus WPA3 for wireless security is a specific testable topic. WPA2 uses AES encryption and is the current standard in most deployed networks. WPA3 provides stronger individual data encryption and replaces the Pre-Shared Key handshake with Simultaneous Authentication of Equals (SAE), making it more resistant to offline dictionary attacks. The exam tests which wireless security standard provides stronger protection and in which scenarios WPA3 enterprise versus WPA3 personal is appropriate.

Physical security is also included at a conceptual level — server rooms require locked doors, badge access, and camera monitoring. These questions test basic security awareness rather than technical configuration.

What CertEmpire’s 100-150 Exam Dumps Include

PDF Dumps — Instant Download. All six CCST Networking domains covered with questions that reflect the 50-minute, 40–50-question exam format. Special depth in Addressing and Subnet Formats (subnetting practice scenarios), Infrastructure (default gateway and MAC table questions), and Diagnosing Problems (show command output interpretation) — the three domains where practical understanding matters most. Preview a free demo.

Timed Exam Simulator. 40–50 questions in 50 minutes, replicating the CCST exam pace. At 50 minutes total, you have approximately 60–75 seconds per question. The simulator builds time awareness before exam day. Full practice test library.

Explanation-Backed Answers. Every answer explains the specific networking concept, Cisco IOS behavior, or troubleshooting principle being tested. For show command questions, explanations walk through what the command output means and what action it implies.

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100-150 Preparation at a Glance

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Frequently Asked Questions

What is the Cisco 100-150 exam? 

The 100-150 is the CCST Networking (Cisco Certified Support Technician — Networking) exam. It contains 40–50 questions, lasts 50 minutes, costs $125 USD, and requires 70% to pass. It validates entry-level networking knowledge across six domains and is the first step on the Cisco certification path toward CCNA.

How is the 100-150 different from the CCNA 200-301? 

The 100-150 CCST is entry-level, covering networking fundamentals without configuration depth or protocol specifics. The CCNA 200-301 is associate level, covering routing protocols, VLANs, wireless, security, and automation in significantly more depth. CCST takes 50 minutes with 40–50 questions. CCNA takes 120 minutes with 100–120 questions. CCST costs $125; CCNA costs $330.

What show commands does the 100-150 test? 

The CCST Networking exam specifically references these Cisco IOS show commands: show run, show cdp neighbors, show ip interface brief, show ip route, show version, show inventory, show switch, show mac address-table, show interface, show interface x, and show interface status. Understanding what each command displays and how to interpret the output is tested.

Is subnetting tested on the 100-150? 

Yes. The Addressing and Subnet Formats domain tests IPv4 subnetting including subnet mask application, CIDR notation, host range calculation, and network/broadcast address identification. IPv6 is tested at an introductory level (format recognition and abbreviation rules). Subnetting practice before the exam is strongly recommended.

What career roles does the CCST Networking target? 

The 100-150 targets Network Support Technician, Help Desk Technician, and IT Support Specialist roles — entry-level positions where staff support and maintain existing network infrastructure rather than design or configure new networks. The certification also serves secondary and post-secondary students as their first verified networking credential.

Is there a free demo available? 

Yes. Visit our free demo files page and free practice test library.