70-642 Ch2 Dns Config

Front 1

LLM NR

Back 1

LLM NR is always used to resolve computer names on the local subnet for the
Network Map feature and for network browsing through Network on the Start menu

Front 2

IPv6 multicast

Back 2

FF02:0:0:0:0:0:1:3

Front 3

IPv4 multicast

Back 3

224.0.0.252

Front 4

NetBIOS Node Types

Back 4

broadcast (b-node)
Point-to-point (p-node)
mixed (m-node)
hybrid (h-node)

Front 5

server is authoritative

Back 5

A server is authoritative for a domain when that server relies on locally hosted database data (as opposed to merely cached information from other servers)

Front 6

DNS Zones

Back 6

A DNS zone is a contiguous portion of a namespace for which a server is authoritative

Front 7

DNS Resolvers

Back 7

A DNS resolver is a service that uses the DNS protocol to query for information from DNS servers. DNS resolvers communicate with either remote DNS servers or the DNS server

Front 8

Resource Records

Back 8

Resource records are DNS database entries that are used to answer DNS client queries. Each DNS server contains the resource records it needs to answer queries for its portion of the DNS

Front 9

recursion.

Back 9

Using this process, a DNS
server can query other DNS servers on behalf of the requesting client in order to resolve an
FQDN.

Front 10

If a computer needs to resolve a DNS name, what is the frst method it attempts to use?

Back 10

A computer frst checks the resolver cache to answer a query.

Front 11

When a DNS server receives a query, how does it frst attempt to resolve the name?

Back 11

A DNS server frst attempts to resolve a query by using resource records stored in a locally confgured zone.

Front 12

f a DNS server cannot resolve a query by using the frst method, which method
will it use next?

Back 12

If a DNS server cannot resolve a query by using zone data, it attempts to answer the query by using cached information.

Front 13

Recursion

Back 13

Recursion in DNS refers to the process of a DNS server querying other DNS servers on behalf of an original querying client.

Front 14

Iteration

Back 14

Iteration refers to the process of making repeated queries to different DNS servers to resolve a name.

Front 15

When would a DNS server contact a root server?

Back 15

A DNS server contacts a root server when it cannot answer a query with its own
cached or authoritative data.

Front 16

If a DNS server contacts a root server to resolve the name www.contoso.com
and the root server cannot ans

Back 16

The root server responds to the DNS server with a referral for the address of the
DNS server authoritative for the .com domain. The DNS server then contacts this
server for which it has received a referral.

Front 17

The Hosts fle

Back 17

The Hosts fle helps resolve host names (essentially DNS names) to IP addresses

Front 18

Lmhosts fle

Back 18

the Lmhosts fle helps resolve NetBIOS names to IP addresses.

Front 19

clear the server cache at the command

Back 19

Dnscmd /clearcache

Front 20

A Time to Live (TTL) value applies to all cached resource

Back 20

3600 seconds (1 hour),

Front 21

What is the main function of Dcpromo?

Back 21

It is used to promote a server to a domain controller.

Front 22

If you want to install a DNS server on a stand-alone or member server running a Server Core

Back 22

start /w ocsetup DNS-Server-Core-Role

start /w ocsetup DNS-Server-Core-Role /uninstal l

Front 23

Root Hints files

Back 23

WINDOWS\System32\Dns
\Cache.dns

Front 24

DNS socket pooling

Back 24

randomizes the source
port from which DNS servers perform queries (pool 2500 ports)

Front 25

socket

Back 25

(A socket is a combination of an address and port number

Front 26

You can adjust the size of the pool of ports

Back 26

dnscmd /Confg /socketPoolsize <value>

Front 27

If you need to exclude certain source ports from being used for DNS queries,

Back 27

dnscmd /Confg /socketPoolExcludedPortRanges <excluded port ranges>

Front 28

DNS cache locking

Back 28

helps prevent DNS server spoofing and cache poisoning

Front 29

To confgure DNS cache locking,

Back 29

dnscmd /Confg /CacheLockingPercent <percent>

Front 30

DNS Devolution Levels

Back 30

A devolution level is the number of tags left in a domain name to serve as a limit or stopping point for parent domain searching.

Front 31

attempt to force a registration in DNS

Back 31

Ipconfg /registerdns

Front 32

By default, does a client with a domain name assigned by DHCP (and not Active Directory membership) attempt to register its address in DNS?

Back 32

No

Front 33

To view the DNS client cache

Back 33

ipconfg /displaydns