4.2 Name Resolution

Question 1

DNS

Answer 1

Domain Name System

DNS is a global and highly distributed network service that resolves strings of letters into IP addresses for you.

Question 2

DOMAIN NAME

Answer 2

A domain name is the term we use for something that can be resolved by DNS.

Question 3

NAME RESOLUTION

Answer 3

The process of using DNS to turn a domain name into an IP address is known as name resolution.

Question 4

What are the four part of the Standard Modern Network Configuration?

Answer 4

1 IP address
2 Subnet Mask
3 Gateway for a host
4 DNS sever

Question 5

What are the five primary Types of DNS servers?

Answer 5

1 Caching name servers
2 Recursive name servers
3 Root name servers
4 TLD name servers
5 Authoritative name servers

Question 6

1 CACHING NAME SERVERS

Answer 6

Their purpose is to store domain name lookups for a certain amount of time.

Question 7

2 RECURSIVE NAME SERVERS

Answer 7

Recursive name servers are ones that perform full DNS resolution requests.

Question 8

TTL

Answer 8

Time To Live.
This is a value, in seconds that can be configured by the owner of a domain name for how long a name server is allowed to cache an entry before it should discard it and perform a full resolution again.

Question 9

ANYCAST

Answer 9

Anycast is a technique that’s used to route traffic to different destinations depending on factors like location, congestion or link health.

Question 10

3 ROOT NAME SERVERS

Answer 10

13 authorities that provide root name lookups as a service.

Question 11

4 TLD NAME SERVERS

Answer 11

TLD stands for top-level domain and represents the top of the hierarchical DNS name resolution system.
A TLD is the last part of any domain name.
For each TLD in existence, there is a TLD name server.

Question 12

5 AUTHORITATIVE NAME SERVERS

Answer 12

Authoritative name servers are responsible for the last two parts of any domain name, which is the resolution at which a single organization may be responsible for DNS lookups.