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Free CCNA | DNS | Day 38 Lab | CCNA 200-301 Complete Course

2 min read 3 months ago

Published on Nov 25, 2025 This response is partially generated with the help of AI. It may contain inaccuracies.

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Introduction

This tutorial covers the configuration of the Domain Name System (DNS) as part of the CCNA 200-301 course, specifically from Day 38 of Jeremy's IT Lab series. Understanding DNS is crucial for network management and troubleshooting, as it translates domain names into IP addresses, facilitating communication over the internet.

Step 1: Setting Up DNS on a Router

Access the router through your terminal or console.
Enter privileged EXEC mode by typing:
```
enable
```
Enter global configuration mode:
```
configure terminal
```
Define the DNS server that the router will use. For example, to set Google's public DNS:
```
ip name-server 8.8.8.8
```

Step 2: Configuring Hostnames

While still in global configuration mode, assign a hostname to your router:
```
hostname [YourRouterName]
```
Replace [YourRouterName] with a desired name for your router.
Optionally, configure a domain name for your network:
```
ip domain-name [YourDomainName]
```
Replace [YourDomainName] with your preferred domain.

Step 3: Verifying DNS Configuration

Use the following command to verify the DNS server settings:
```
show running-config | include name-server
```
To check if the hostname resolves correctly, use:
```
ping [hostname]
```
Replace [hostname] with the hostname you configured.

Step 4: Testing DNS Resolution

From your router, attempt to ping an external domain, such as:
```
ping www.example.com
```
If successful, this indicates that DNS is functioning correctly.

Conclusion

In this tutorial, we covered the essential steps for configuring DNS on a router, including setting up DNS servers, configuring hostnames, and verifying the configuration. Mastery of DNS is a vital skill for network professionals. For further practice, consider using Boson NetSim or exploring additional labs to enhance your understanding.

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