Cisco 100-490 Valid Test : Supporting Cisco Routing and Switching Network Devices

  • Exam Code: 100-490
  • Exam Name: Supporting Cisco Routing and Switching Network Devices
  • Updated: Sep 13, 2026
  • Q&As: 74 Questions and Answers

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You can peruse the Cisco 100-490 Exam Requirements

  • There is no Prerequisites for this exam

Reference: https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/100-490-rstech.html

Topics Covered in Official Validation

As for the main domains assessed by test 100-490, they are as described below:

  • IOS Software of Cisco and Its Operations

    Cisco IOS Software Operation covers 29% of the test syllabus. It assesses the candidate's ability to navigate the different operating modules, identify configuration files from a Cisco device, and use the fundamental command for Cisco IOS Software. It also details the ability to describe key roles of Cisco IOS, IOS-XE, IOS-XR, and NX-OS software. In addition, such a topic enlightens applicants on the process of licensing happening on diverse platforms and how to describe & install a bundle mode and the one for IOS-XE.

  • Related Hardware and Equipment of Cisco

    It takes up 20% of the exam and measures the candidate's ability to identify Cisco equipment, products, and components. Some of these include tools for hardware installation and replacement, Transceiver Modules offered by Cisco, Cisco model numbers, logo markings, and many of the commonly used components. Also, here, you'll come across how to deal with the Cisco Nexus 9000 Series, NCS 5500 Series, Cisco ASR 1000 Series and will define hardware memory concepts and how they are used in switches and routers of Cisco.

  • Common Knowledge of Networking

    This topic covers 25% of the exam questions. In particular, it tests candidates' knowledge of using TCP/IP and the OSI models as well as all their related protocols to describe the way data flows within a network. It also covers a lot of other aspects such as LAN cabling, the point for Telco termination, the function of IPv4 & iPv6 addresses, and subnet facets. What's more, within such an area, you'll come across such terms as CSU/DSU, layer 2 technologies, SSH, PING, and their functions.

  • Knowledge Related to Services

    This area covers 26% of the topics covered in the official evaluation. This tests your ability to locate service aspects such as text editor, Windows prompt for commands, and Terminal Emulation. It also checks candidates' configuration knowledge such as configuring network settings for the ports of Ethernet on a laptop, the status of operations by using a device interface, plus FTP and TFTP servers. Lastly, this domain revolves around such notions as USB storage, issues with layers 1 & 2, password recovery, TCP/IP network, and Telco loopback.

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Cisco 100-490 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Cisco IOS Software Operation29%- Cisco IOS Fundamentals
  • 1. Startup and configuration files
  • 2. Boot sequence process
  • 3. Cisco IOS software types
- Device Access
  • 1. Console access
  • 2. Terminal emulation
  • 3. Remote access methods
- Configuration Management
  • 1. Restore configurations
  • 2. IOS XE operational modes
  • 3. Backup configurations
- Basic IOS Commands
  • 1. Configuration commands
  • 2. Verification commands
  • 3. Navigation commands
Topic 2: General Networking Knowledge25%- Networking Fundamentals
  • 1. Basic networking hardware
  • 2. Layer 1 and Layer 2 technologies
  • 3. OSI and TCP/IP models
  • 4. Network addressing concepts
- Network Utilities
  • 1. Basic connectivity verification
  • 2. IP configuration tools
  • 3. Ping and traceroute
- Network Responsibilities
  • 1. Roles of routers and switches
  • 2. Network support responsibilities
Topic 3: Cisco Equipment and Related Hardware20%- Hardware Components
  • 1. Power supplies
  • 2. Cabling requirements
  • 3. Ports and interfaces
- Hardware Replacement
  • 1. Device installation and replacement procedures
  • 2. Field-replaceable units
- Cisco Device Identification
  • 1. Device components
  • 2. Cisco router models
  • 3. Cisco switch models
- Memory and Storage
  • 1. Flash memory usage
  • 2. RAM functions
  • 3. NVRAM functions
Topic 4: Service-related Knowledge26%- Support Tools
  • 1. Diagnostic utilities
  • 2. Maintenance best practices
  • 3. Windows troubleshooting tools
- Recovery Operations
  • 1. Factory reset procedures
  • 2. Configuration recovery
  • 3. Password recovery
- Troubleshooting
  • 1. Basic Layer 1 troubleshooting
  • 2. Basic Layer 2 troubleshooting
  • 3. Connectivity issue diagnosis
- Software Maintenance
  • 1. Software recovery procedures
  • 2. Image management
  • 3. Cisco IOS upgrades

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