Chapter 1

Question 1

DNS query

Answer 1

Name resolution query that is sent to a DNS server. The DNS server provides either an authorative or nonauthorative response to the client query.

Question 2

Authoritative

Answer 2

Authoritative response is one in which the server returns an answer that it knows is correct because the request is directed to the authoritative server that manages the domain. DNS server is authoritative when it hosts a primary or secondary copy of a DNS zone. DNS server hosting an AD-integrated zone is also authoritative.

Question 3

Nonauthoritative

Answer 3

Response in which the DN server that contains the requested domain in its cache answers a query by using forwarders or root hints. Bc answer might not be exact, it is also called nonauthoritative response.

Question 4

dnsmcmd/clearcache

Answer 4

you can clear the DNS server hostname cache

Question 5

What is a recursive query DNS?

Answer 5

Where one DNS server communicates with several other DNS servers to hunt down an IP address and return it to the client

Question 6

Two possible results of a query?

Answer 6

1. DNS server returns IP address of the host requested.

2. DNS server cannot resolve and IP address.

Question 7

What are the dnscmd.exe utility or PowerShell cmdlet Set-DNSServerRecursion?

Answer 7

Can be used to disable recursion on a Windows Server 2016

Question 8

Iterative Queries

Answer 8

Access domain name information that resides across the DNS system. The client communicates directly with each DNS server involved in the the lookup. You can use iterative queries to quickly resolve names across many servers.

Question 9

Fowarder

Answer 9

Windows Server 2016 DNS server that forwards queries for external names to DNS servers outside or inside its network.

Question 10

Round Robin

Answer 10

Often used to load-balance requests among multiple web servers

Question 11

Conditional forwarder

Answer 11

DNS server on a network that forwards DNS queries to other DNS servers. EX: You can configure a DNS server to forward all queries that it receives for names that end with corp.pearson.com to IP address of a specific DNS server or to IP addresses of multiple DNS servers.

Question 12

Disable Recursion on a Windows Server 2016 server

Answer 12

Use dnscmd.exe utility or the PowerShell cmdlet Set-DnsServerRecursion