CCNA Scenario-based Questions and Answers

CCNA Scenario-based Questions and Answers


Welcome to our CCNA scenario-based questions and answers blog! In this post, we will explore some real-world networking scenarios and provide detailed answers to help you prepare for the CCNA certification exam. Whether you are an aspiring network engineer or looking to enhance your networking knowledge, these scenarios will test your skills and leave you better equipped to handle complex network configurations.

Scenario 1: Troubleshooting Network Connectivity:

You are working as a network administrator for a multinational company. A user complains about being unable to connect to a network resource. How would you troubleshoot this issue?

Answer: To troubleshoot network connectivity issues, you can follow these steps:

  1. Check the physical connection: Ensure that the user’s network cable is securely connected to both the computer and the network switch.
  2. Verify IP configuration: Check the IP address configuration on the user’s computer, ensuring it is in the same subnet as the network resource.
  3. Troubleshoot DNS: Ensure that the user’s computer has the correct DNS server settings to resolve the network resource’s hostname.
  4. Check network firewall and ACLs: Verify if any firewalls or Access Control Lists (ACLs) are blocking the user’s access to the network resource.
  5. Test network connectivity: Use network diagnostic tools like ping and traceroute to verify if packets are reaching the network resource.

Scenario 2: Configuring VLANs:

Your company has multiple departments that require isolation. You need to create separate broadcast domains using VLANs. How would you configure VLANs on your company’s switch?

Answer: To configure VLANs on a switch, follow these steps:

  1. Create VLANs: Access the switch’s configuration mode and define the VLANs using the ‘vlan’ command.
  2. Assign VLANs to switch ports: Specify which switch ports belong to each VLAN using the ‘interface’ and ‘switchport access vlan’ commands.
  3. Configure trunk ports (optional): If inter-VLAN communication is required, configure trunk ports using the ‘interface’ and ‘switchport mode trunk’ commands.
  4. Configure router or Layer 3 switch: To enable communication between VLANs, connect a router or Layer 3 switch to the trunk port and configure appropriate routing.

Scenario 3: Implementing OSPF Routing:

Your company has multiple branch offices and wants to implement OSPF routing for efficient traffic routing. How would you configure OSPF on the company’s routers?

Answer: To configure OSPF on routers, follow these steps:

  1. Enable OSPF routing: Access the router’s configuration mode and enter the ‘router ospf’ command to enable OSPF.
  2. Configure OSPF areas: Use the ‘area’ command to define OSPF areas based on network and geographical requirements.
  3. Assign OSPF interfaces: Specify which interfaces participate in OSPF using the ‘network’ command.
  4. Configure OSPF authentication (optional): If required, configure OSPF authentication using the ‘authentication’ command for secure routing.
  5. Verify OSPF routing: Use the ‘show ip ospf’ command to verify OSPF routing table entries and adjacency status.


In this blog post, we have explored three scenario-based CCNA questions and their detailed answers. By practicing such scenarios, you can enhance your networking skills and prepare effectively for the CCNA certification exam. Remember to apply these concepts in hands-on lab environments to solidify your understanding. Good luck with your CCNA journey!

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