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

Summary

In this informative video from Jeremy's IT Lab, viewers are guided through a complete CCNA course focused on configuring the Domain Name System (DNS). The tutorial explains how to set up Router R1 and three PCs to use Cloudflare's DNS server (1.1.1.1). Key steps include creating a default route, configuring static IPs for the devices, and utilizing Packet Tracer’s simulation mode to observe DNS operations. Additionally, the video introduces Boson’s NetSim, a powerful tool for hands-on practice in networking. The instructor encourages viewers to engage with the content through subscriptions and comments, enhancing the learning experience.

Takeaways

• 😀 This is a free, complete CCNA course, encouraging viewers to subscribe and engage with the content.
• 😀 To access lab files for hands-on practice, viewers should sign up via the provided link in the description.
• 😀 The video introduces Cloudflare's DNS server (1.1.1.1) as an alternative to Google's DNS server (8.8.8.8).
• 😀 In this lab, viewers learn to configure a default route on Router1 to access the Internet.
• 😀 The IP DNS SERVER command is not available in Packet Tracer, limiting the ability to configure R1 as a DNS server.
• 😀 R1's host table allows it to ping local PCs by name, illustrating how DNS and ARP work together in network communication.
• 😀 Packet Tracer's simulation mode helps visualize network message flow, including DNS queries and ARP requests.
• 😀 The importance of enabling the IP DOMAIN LOOKUP command for hostname resolution on routers is emphasized.
• 😀 Boson NetSim offers a more advanced network simulation environment with guided labs for CCNA exam preparation.
• 😀 The video concludes with a thank you to channel members and encourages further engagement through subscriptions and tips.

Q & A

What is the main purpose of the video?

The video is a free CCNA course that focuses on configuring DNS and understanding its function in translating domain names to IP addresses.

What DNS server IP address is used in the lab?

The lab uses Cloudflare's DNS server with the IP address 1.1.1.1.

Why can't R1 be configured as a DNS server in Packet Tracer?

The IP DNS SERVER command is not available in Packet Tracer, preventing R1 from acting as a DNS server for internal hosts.

What commands are used to configure a default route on R1?

The command used to configure a default route on R1 is 'IP ROUTE 0.0.0.0 0.0.0.0 203.0.113.2.'

How does the simulation mode in Packet Tracer help users?

Simulation mode allows users to visualize the various messages sent when a device pings a domain name, providing insights into the traffic flow through a network.

What does the command 'IP HOST' do in this context?

The command 'IP HOST' creates host entries in R1's host table, allowing R1 to translate device names to their corresponding IP addresses.

What steps are involved in configuring DNS on R1?

To configure DNS on R1, you enable the DNS server feature using 'IP DNS SERVER' and create host table entries for the devices.

What is the role of the 'IP DOMAIN-LOOKUP' command?

The 'IP DOMAIN-LOOKUP' command enables hostname-to-address translation, allowing devices to resolve hostnames to IP addresses.

What happens when PC1 pings youtube.com in the simulation?

When PC1 pings youtube.com, a DNS query is sent to R1, which forwards it to the DNS server (1.1.1.1). The response includes the IP address for youtube.com, allowing PC1 to complete the ping.

What additional resource does the instructor recommend for CCNA study?

The instructor recommends Boson's NetSim for CCNA, a network simulator that includes guided labs for hands-on practice.