Week 6 - Digging into DNS* Flashcards
What are public DNS servers?
public DNS servers are free to be used by anyone
What are Level 3’s public DNS server addresses?
4.2.2.1 - 4.2.2.6
What are Google’s public DNS server addresses?
8.8.8.8 and 8.8.4.4.
What do public DNS servers use to be available globally?
anycast
Most DNS servers respond to _____ to test connectivity
ICMP echo requests, can use ping to test connections
What’s a way your DNS requests could be hijacked?
outbound DNS requests redirect users to malicious sites using a fake DNS entry
Who is responsible for assigning individual domain names to other orgs or individuals?
Registrar
What type of system is DNS? (overall)
Global hierarchy with ICANN at the top level
Can domain names be transferred? How?
Yes, you just configure your DNS settings to contain a special string of characters (from registrar) to confirm you own the domain and are transferring it
Do domain names expire?
Yes, you have to keep on top of them or someone else could steal it
What was the most notable organization that was responsible for almost all domains?
Network Solutions, Inc.
How do you have access to a DNS as a consumer?
ISPs give you access to a recursive name server as part of the service
What is a host file?
A host file is a file where each line contains an IP address and the host name it can be referred to as
What took care of evaluating host files?
Networking stack
In a host file, what would be considered the ‘domain’ name?
Host name
