Configure DNS Records

Question 1

DNS Zone Database

Answer 1

made up of a collection of resource records, which are used to answer DNS queries. Each resource record (RR) specifies information about a particular object. Each record has a type, an expiration time limit, and some type-specific data.

Question 2

2 records automatically created when you create a new zone

Answer 2

SOA

NA

Question 3

SOA

Answer 3

Start of Authority (SOA) record: Specifies authoritative information about a DNS zone, including the primary name server, the e-mail of the domain administrator, the domain serial number, and the expiration and reload timers of the zone.

Question 4

NS record

Answer 4

Name Server (NS) record: Specifies an authoritative name server for the host.

Identifies name servers

Question 5

Records not automatically created when you create a new zone

Answer 5

Host
Canonical Name
Pointer
Mail Exchange
Service Location

Question 6

Host record

Answer 6

A and AAAA records

Maps a domain/host name to an IP address.

Question 7

Canonical Name record

Answer 7

CNAME

Sometimes referred to as an Alias, maps an alias DNS domain name to another primary or canonical name.

Question 8

Pointer records

Answer 8

PTR
Maps an IP address to a domain/host name.

for reverse lookup

Question 9

Mail exchanger records

Answer 9

MX

Maps a DNS domain name to the name of a computer
that exchanges or forwards e-mail for the domain.

Question 10

Service Location record:

Answer 10

SRV
Maps a DNS domain name to a specified list of host computers that offer a specific type of service, such as Active Directory domain controllers.

Question 11

Round Robin

Answer 11

is a DNS balancing mechanism that distributes network load among multiple servers by rotating resource records retrieved from a DNS server.

Question 12

dynamic updates

Answer 12

resource records for the clients are automatically created and updated at the host’s primary DNS server. For Active Directory-integrated zones, these records are automatically replicated to the other DNS servers. However, because standard dynamic updates are insecure, Microsoft added secure dynamic updates.

Question 13

Aging

Answer 13

the process of using timestamps to track the age of dynamically registered resource records

Question 14

Scavenging

Answer 14

the mechanism to remove stale resource records.

Question 15

Typically, stale DNS records occur when ___

Answer 15

a computer is permanently removed from the network. M

Question 16

ipconfig /flushdns

Answer 16

Flushes and resets the contents of the DNS client resolver cache.

Question 17

ipconfig /displaydns

Answer 17

Displays the contents of the DNS client resolver cache, which includes both entries preloaded from the local hosts file and any recently obtained resource records for name queries resolved by the computer.

Question 18

ipconfig /registerdns:

Answer 18

Initiates manual dynamic registration for the DNS names and IP addresses that are configured at a computer. You can use this parameter to troubleshoot a failed DNS name registration or resolve a dynamic update problem between a client and the DNS server without rebooting the client computer.

Question 19

AAAA Records

Answer 19

prounounced “quad-a”

domain address for IPv6 addresses

Question 20

A Records

Answer 20

domain address for IPv4 addresses.