Network Address Resolution / Domain Name Resolution Case

Question 1

What are the private IP address ranges

Answer 1

10. 0.0.0 - 10.255.255.255
11. 16.1.0 - 172.31.255.255
12. 168.0.0 - 192.168.255.255

Question 2

What prefix do unique local addresses start with

Answer 2

FC00

Question 3

What port does DNS use for queries

Answer 3

Domain Name System - UDP port 53

Question 4

Where do DNS servers host data

Answer 4

Zones that contain multiple records

Question 5

What is the most commonly used record in DNS

Answer 5

A or host record

Question 6

What is the most commonly used record for ipv6 dns records

Answer 6

AAAA

Question 7

Considered the opposite of an “A” record

Answer 7

PTR - Pointer Record

Question 8

DNS record that is linked to “A” or “AAAA” record of a mail server

Answer 8

MX - Mail Exchange or Mail Exchanger

Question 9

An alias that allows a single system to have multiple names associated with an IP address. Used with DNS.

Answer 9

CNAME - Canonical Name

Question 10

DNS record that includes information about DNS zone settings such as TTL

Answer 10

SOA - Start of Authority

Question 11

DNS server zone transfers occur in what port

Answer 11

TCP port 53

Question 12

A suite of extensions to DNS that provides validation for DNS responses. Prevents DNS poisoning attacks.

Answer 12

DNSSEC - Domain Name System Security Extensions

Question 13

The command to troubleshoot DNS problems

Answer 13

nslookup (name server lookup)

Dig (Linux)