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CompTIA JK0-U21

JK0-U21

Exam Code: JK0-U21

Exam Name: CompTIA Strata Fundamentals of PC Technology Exam

Updated: Jul 22, 2026

Q & A: 241 Questions and Answers

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CompTIA JK0-U21 Exam Syllabus Topics:

SectionObjectives
Topic 1: Networking Fundamentals- Basic networking concepts
  • 1. LAN, WAN, and internet fundamentals
    • 2. Network devices (router, switch, modem)
      - Connectivity basics
      • 1. Wired and wireless connections
        • 2. Basic troubleshooting connectivity issues
          Topic 2: Security Fundamentals- Basic security concepts
          • 1. Malware awareness
            • 2. Passwords and authentication basics
              - Safe computing practices
              • 1. Data protection fundamentals
                • 2. Safe browsing and email usage
                  Topic 3: Operating Systems and Software Basics- Software types
                  • 1. Basic software installation concepts
                    • 2. Application vs system software
                      - Operating system concepts
                      • 1. User interface concepts
                        • 2. File systems and basic OS functions
                          Topic 4: Computer Hardware Fundamentals- System components (CPU, RAM, storage devices)
                          • 1. Basic CPU architecture and function
                            • 2. Memory types and storage devices overview
                              - Peripheral devices
                              • 1. Common hardware interfaces
                                • 2. Input/output devices and connectivity
                                  Topic 5: Troubleshooting and Support- Basic troubleshooting methodology
                                  • 1. Basic diagnostic steps
                                    • 2. Identifying common PC issues

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