Network Naming

Question 1

DNS

Answer 1

Domain Name System

Question 2

DNS Root Servers

Answer 2

Bunch of powerful computers dispersed around the world for DNS

Question 3

TLD

Answer 3

Top Level domains; which include .com .gov .int .eu .us etc.

Question 4

Second Level DNS

Answer 4

These are just below TLD’s and can handle personal computers/servers.

Question 5

What type of namespace do host files use?

Answer 5

Flat name space

Question 6

Flat name Space

Answer 6

One big undivided list containing all name, with no grouping

Question 7

Hierarchical Name space

Answer 7

Enables admins to give networked systems longer more fully descriptive names.

Question 8

FQDN

Answer 8

Fully Qualified Domain Name

Question 9

DNS zone

Answer 9

A container for a single domain that gets filled with records

Question 10

Record

Answer 10

A line in the zone data that maps an FQDN to an IP address

Question 11

Cached Lookups

Answer 11

all the ip addresses it has already resolved

Question 12

Forward Lookup zones

Answer 12

The IP addresses and FQDN’s for all computers in a domain are stored here

Question 13

SOA

Answer 13

Start of Authority records that defines the primary name server in charge of the forward lookup zone

Question 14

NS Record

Answer 14

Shows the primary name server

Question 15

CNAME Record

Answer 15

Canonical Name Record, acts like an Alias.

Question 16

AAAA Record

Answer 16

Equivalent to A records but used for IPv6 addressing

Question 17

MX Record

Answer 17

Used Exclusively by SMTP Servers to determine where eto send mail

Question 18

SRV Record

Answer 18

Generic DNS records that supports any type of server

Question 19

Basic format of an SRV record

Answer 19

Service
Proto
name
TTL
Priority
Weight
Port
Target

Question 20

Services that use SRV

Answer 20

Kerberos servers, LDAP, SIP

Question 21

Primary Zones

Answer 21

Created on DNS servers to act as primary name server for that zone

Question 22

Secondary zones

Answer 22

Created on other DNS servers to act as backups to the primary zone

Question 23

Reverse Lookup Zone

Answer 23

Does the exact reverse and find the FQDN using the IP address

Question 24

PTR

Answer 24

Pointer Record which is used in Reverse lookup zones to add a unique domain to create in the zone “in-addr.arpa”

Question 25

DDNA

Answer 25

Dynamic DNS which enabled DNS servers to get auto updates of IP addresses of computers in their forward lookup zones

Question 26

DNSSEC

Answer 26

DNS Security Extensions, protocol designed to prevent bad users from impersonating legit DNS servers.

Question 27

IPAM

Answer 27

IP address management; a DHCP server and DNS server working together to administer IP addresses,

Question 28

nslookup command

Answer 28

You can query all types of information from a DNS server and change how your system uses DNS.