Week 4 Name Resolution In Practice

Question 1

A record

Answer 1

Used to point a certain domain name at a certain IPv4 IP address

Question 2

Round robin

Answer 2

A concept that involves iterating over a list of items one by one in an orderly fashion

Question 3

Quad A record

Answer 3

Similar to A record, except that it returns an IPv6 address instead of an IPv4 address

Question 4

CNAME record

Answer 4

Used to redirect traffic from one domain name to another

Question 5

Mail exchange (MX)

Answer 5

This resource record is used in order to deliver email to the correct server

Question 6

Service record (SRV)

Answer 6

Used to define the location of various specific services

Question 7

Text record (TXT)

Answer 7

Originally intended to be used only for associating some descriptive text with a domain name for human consumption

Question 8

ICANN

Answer 8

The Internet Corporation for Assigned Names and Numbers

Question 9

Domains

Answer 9

Used to demarcate where control moves from a TLD name server to an authoritative name server

Question 10

Fully qualified domain name (FQDN)

Answer 10

When you combine all of these parts together you have what’s t known as this

Question 11

DNS zones

Answer 11

Allow for easier control over multiple levels of a domain

Question 12

Zone files

Answer 12

Simple configuration files that declare all resource records for a particular zone

Question 13

Start of authority (SOA)

Answer 13

Declares the zone and the name of the name server that is authoritative for it

Question 14

NS records

Answer 14

Indicates other name servers that might also be responsible for this zone

Question 15

Reverse lookup zone files

Answer 15

These let DNS resolvers ask for an IP and get the FQDN associated with it returned

Question 16

Pointer record (PTR)

Answer 16

Resolves an IP to a name

Question 17

A fully qualified domain name can contain how many characters?

Answer 17

255