DNS Day 4 Reflection

What is DNS?
-DNS: Domain Name Servers. DBS directs dinuba names and transfers them into IP addresses.
Why does the Internet use IP addresses?
-Because IP addresses are simple and fast. There are many possible IP address combinations.
Why don’t we need to know IP addresses?
-Because websites have domain names, which redirect us to the IP address. Domain names take the place of IP addresses.
Why do we need a Domain Name System?
-It would be too complicated to constantly type in IP addresses, so a domain name system is needed.
Why don’t we all maintain our own DNS?
-Because many people own multiple sites and trust their ISP services to maintain the DNS for them. ISP services maintain a reliable and stable DNS connection.
Is there one big DNS for the entire Internet?
-No, there are many different DNS servers that interconnect throughout the internet.
How do you think all these DNS servers are maintained?
-Through constant maintaining. Since there are so many DNS servers, if one goes down, it is not the end of the world for the others.
Prompts: Security
What is one vulnerability of DNS and how is that vulnerability attacked?
-A vulnerability of DNS is cache poisoning, which is when attackers spoof DNS servers to return incorrect IP addresses.
What are the implications of an attack on a DNS server (or servers) - how does this affect your life?
-Implications include large numbers of packets that do not have any useful information in them, which shows that attacks are about to take place on the server. This affects my life because there are many potential DNS risks out there that could take place, and I could run into any of them at any time and be at risk for a virus or security attack.

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