Practical Cyber Hacking Skills for Beginners - Working with DNS Commands

The video tutorial explains the concept of DNS cache and its role in speeding up website access by storing DNS records locally. It covers the Time to Live (TTL) parameter, which determines how long a DNS record is stored. The tutorial demonstrates how to flush the DNS cache using commands and explains the significance of the hosts file in mapping IP addresses to domain names. Practical uses of the hosts file, such as during website migration, are discussed. The video also provides instructions for accessing the hosts file and running DNS commands on Mac systems.

What is the primary purpose of the DNS cache on a computer?

• To store browsing history

• To block unwanted websites

• To speed up access to frequently visited websites

• To store website passwords

What does the 'time to live' (TTL) in a DNS record indicate?

• The time it takes to establish a connection to a server

• The time a website is live on the internet

• The time it takes to load a website

• The duration before a DNS record is removed from the cache

What command is used to clear the DNS cache on a Windows machine?

• ipconfig/resetdns

• ipconfig/flushdns

• ipconfig/cleardns

• ipconfig/displaydns

Why might some DNS records still appear after flushing the DNS cache?

• They are stored in the browser history

• They are saved in the hosts file

• They are backed up in the cloud

• They are part of the operating system

What is the role of the hosts file on a computer?

• To save browsing history

• To block pop-up ads

• To map IP addresses to domain names manually

• To store user passwords

How can the hosts file be useful during website migration?

• It can block the old website

• It can direct the browser to the new web host

• It can automatically update DNS records

• It can speed up the migration process

Where can you find the hosts file on a Mac computer?

• /System/Library/Hosts

• /private/etc/hosts

• /Applications/Hosts

• /usr/local/hosts