Domain Name System (Dns) Server 2008 Exam 70-640

Front 1

What is DNS?

Back 1

Provides way of querying names and IP addresses, replicating the info in the DB as well as the schema

Front 2

Name 7 different common DNS records.

Back 2

SOA, NS, A, CNAME, PTR, MX, and SRV

Front 3

What is an SOA record?

Back 3

Start of Authority Record.
defines the general parameters for the DNS zone, including who the authoritative server is

Front 4

What is an NS record

Back 4

Name Server
list name servers for a domain; allow other name servers to look up names

Front 5

What is an A record

Back 5

Address Record for Host
links hostname to ip address

Front 6

What is a PTR record?

Back 6

Pointer Record.
Links IP address to hostname for reverse lookups

Front 7

What is an MX record?

Back 7

Mail Exchange record
Lists mail server who can accept mail for domain

Front 8

What is an SRV record?

Back 8

Service record
Maps service (eg DC ) to IP address

Front 9

Name the 3 queries types when DNS is used to resolve names or IP's

Back 9

Iterative, Recursive, and Inverse

Front 10

What is an Iterative query?

Back 10

Client asks Server. Server responds with best possible answer

Front 11

What is a Recursive query?

Back 11

Client queries server, server doesn't know, asks each server up the line until answer is returned to client via server.

Front 12

What is an Inverse query?

Back 12

Client queries IP address instead of name.

Front 13

A zone used to resolve names to IP addresses is a _________?

Back 13

a Forward Lookup zone

Front 14

A zone used to resolve IP addresses to names is a ________?

Back 14

a Reverse Lookup zone

Front 15

How do you create new zones?

Back 15

with the New Zone wizard.

Front 16

Where do you configure a zone for Dynamic updates?

Back 16

Properties of the forward/reverse lookup zone - General Tab - Dynamic updates - None/Secure Only/Nonsecure and secure

Front 17

What is the default setting for Dynamic updates

Back 17

Secure only

Front 18

Name 5 tools used to troubleshoot DNS problems?

Back 18

DNS Snap-in
DSS event log
NSLookup
Ipconfig
DNS server log file

Front 19

Multiple sites across Australia.
Single AD tree required.
What DNS and AD structures do you implement to ensure good performance?

Back 19

Install a DNS server at each regional location and create a single domain name for all the regions for resolution of local resources.

Front 20

3 Unix DNS, print & fax servers.
New AD domain with integrated DNS replaces Unix DNS server.
Can't print or fax. What gives?

Back 20

You need to manually add A resource records for the Unix machines.

Front 21

How do you configure a DNS server so that it only answers queries from hosts on your intranet and no where else?

Back 21

Configuring his server as a root server and leaving out root hints for the top-level domains
And
Leaving forwarding turned off

Front 22

What must you do so that your customers can utilize all mirrored web servers?

Back 22

Enable Round Robin DNS to balance out the load across all the servers you have mirrored and configured in the DNS

Front 23

You have multiple remote locations by slow satellite links.Need to install DNS into these offices so that clients can locate authoritative DNS servers in the main location. What type of DNS zones should be installed in the remote locations?

Back 23

Stub Zones - Contain: NS, A and SOA records

Front 24

You have 5 W2k8 DC's. All run as primary DNS zones. Need to ensure all hold same database and use only secure updates.
What do you do?

Back 24

Upgrade all servers to Active Directory Integrated servers.

Front 25

Six Offices. Need single AD tree.
How do you deploy DNS to enable efficient and responsive name/IP resolutions for this environment?

Back 25

Create a single second-level name and deploy a DNS server at each location in the network

Front 26

You want to quickly verify that your DNS service is running and listening to queries. What would you click or look at in the dialog box in order to do this?

Back 26

The Monitoring tab to test forward & reverse lookups

Front 27

ParentCo buys out Childco.
Each Childco. is to have DNS controlled by Parentco but managed individually. How would you manage this?

Back 27

Register a single domain name for Roadrunner Enterprises and use delegated subdomains on DNS servers installed at each location to provide name resolution across the enterprise.

Front 28

When a DNS server sends a request to a Root server for www.google.com, what does the Root server reply with?

Back 28

The IP Address of the name server of the .com top-level domain.

Front 29

If you rarely need to change any DNS data and you find that the load on one of your servers is high what can you do?

Back 29

Increase the TTL on the affected name server

Front 30

If no internet nor email (as if) is required on your network, What DNS records must you include in the configuration of the Windows Server 2008 DNS service in this environment?

Back 30

Host record, Name server records, Start of authority record,
Service record

Front 31

A spammer is attempting to send junk mail through an unsuspecting mail server. The spammer uses a fake DNS name from which they think the mail server will accept mail, but the mail is rejected anyway. How does the mail server know to reject the spammer's mail?

Back 31

The mail server employs a reverse lookup zone to verify that DNS names are not fake

Front 32

How many bits in an IPv4 address?

Back 32

32 bits. 4 Octets of 8 Bits

Front 33

How is an DNS name mapped to an IPv4 address?

Back 33

Through an Host A record

Front 34

How many bits in an IPv6 address?

Back 34

128 bits. 8 Groups of 4 hex characters

Front 35

How is an DNS name mapped to an IPv6 address?

Back 35

Through an Host AAAA record

Front 36

Characters allowed in a DNS name are....

Back 36

only characters a to z, A to Z, 0 to 9, and—(hyphen)

Front 37

What is TTL and what does it do?

Back 37

Time to Live.
Specifies how long remains in DNS Cache

Front 38

What is a DNS zone?

Back 38

a portion of the DNS namespace over which a specific DNS server has authority
Zones are databases that store records

Front 39

What zone contains the primary copy of the DNS database?

Back 39

Primary DNS Zone

Front 40

Where do All record updates occur ?

Back 40

Primary DNS Zone

Front 41

What is a Secondary DNS zone used for?

Back 41

load balancing
and
fault tolerance

Front 42

How DNS Notify Works

Back 42

Primary notifies Secondary that there are changes
Secondary pulls changes off Primary

Front 43

What is Background zone loading?

Back 43

Allows for processing of client requests while rest of zone loads in backgound

Front 44

What's new in the DNS world with W2k8?

Back 44

Background zone loading
Support for TCP/IP version 6 (IPv6)
Read-only domain controllers
GlobalName zone

Front 45

What does the GlobalName zone do?

Back 45

Replaces WINS
Map CNAME to FQDN

Front 46

What is a Caching-Only Server?

Back 46

DNS servers that query, and cache answers, return results
Non-authoritative

Front 47

Why Delegate zones for DNS?

Back 47

delegate management
divide one large zone into smaller zones
extend the namespace

Front 48

What does each newly delegated zone need?

Back 48

primary DNS server
delegation records in other zones that point to the authoritative DNS servers for the new zone

Front 49

What is NSLOOKUP used for?

Back 49

used to perform DNS queries and to examine the contents of zone files on local and remote servers

Front 50

nslookup basic syntax

Back 50

nslookup DNS_name_or_IP_address

Front 51

How do you list the Mail servers in the domain?

Back 51

set type=mx
ls

Front 52

How do you simulate zone transfers with nslookup?

Back 52

ls -d domain_name

Front 53

Where is the dns.log kept?

Back 53

%systemroot%\System32\dns\Dns.log