WinSvr Live Virtual Machine Lab 7-3: Managing DNS Zones and Resource Records

You need to create a resource record for a public-facing Web server in the DNS server. Which of the following type of resource record should you create? - AAAA - MX - A - CNAME

- CNAME

What will happen if you manually edit the DNS zone file and then reload it in the DNS Manager? - It will fail to reload. - It will reload as a new zone. - It will corrupt the existing zone records. - It will apply the changes in the DNS Manager.

- It will apply the changes in the DNS Manager.

Which type of zone can redirect the DNS client to the authoritative DNS server that has authority for resolving hostnames for the given DNS zone? - Stub zone - Primary zone - Secondary zone - Any of the mentioned choices

- Stub zone

Which of the following command is likely to provide the list of Host(A) records? - ls -t srv practicelabs.com - ls -t aa practicelabs.com - ls -t a practicelabs.com - ls -t mx practicelabs.com

- ls -t a practicelabs.com

If your domain name is practicelabs.com, then what would be the zone file name? - practicelabs.com - Dns.practicelabs.com - practicelabs.dns - practicelabs.com.dns

- practicelabs.com.dns

Reverse Lookup zone (RLZ)

A Reverse Lookup zone resolves a computer's numerical IP address to its fully qualified domain name. This type of zone is useful for verifying if the numeric IP address is associated with the computer's full name or FQDN.

AD Integrated zones are typically enabled on a computer that is running the _____ and _____ server.

Active Directory Domain Services Domain Name System (DNS)

Canonical Name (CNAME) record

CNAME is an alias assigned to a computer normally facing the public network, like the Internet. This is typically done to protect a computer's real name.

Zone Transfer

Changes to the Primary DNS zones are replicated to other Secondary zones in a process called Zone Transfer. A Zone Transfer can be initiated manually, and you can set the parameters for when Zone Transfer will occur from the Primary DNS zone to the Secondary DNS zone. DNS clients can resolve host names and IP addresses using a Secondary DNS zone as well.

Resource Records (RRs)

DNS servers maintain Resource Records (RRs) most of which are registered dynamically by devices like domain controllers, member servers, and workstations in the Windows Active Directory Domain. These RRs are used by DNS to resolve a host name to its numeric IP address counterpart whenever requested by a DNS resolver (Windows client) or application. There are RRs that are statically entered, like Mail Exchanger, which identifies the server that receives e-mail from the Internet. Computers that do not support DNS dynamic updates must have their applicable RRs entered to allow other computers in the network to locate them.

To enable an organization's messaging systems to send and receive e-mail from the Internet, a _____ record and _____ record must be created for the e-mail server.

Mail Exchanger (MX) Host (A)

Service Location (SRV) records

SRV or Service Location records are domain controller-related services that are used by domain controllers, member servers, and clients. These services are a global catalog for locating AD-related objects: Kerberos for user and computer authentication, and LDAP for directory lookup functions.

Secondary DNS zone

Secondary DNS zones are read-only copies of the Resource Records that are collected from the Primary DNS.

Stub zone

Stub zones maintain a subset of read-only Resource Records from the Primary DNS server. This type of zone cannot resolve hostnames and IP addresses; however, Stub zones can redirect the DNS client to the authoritative DNS server that has authority for resolving hostnames for the given DNS zone. A Stub zone does not resolve names to IP addresses in the same way that Primary or Secondary DNS zones do. A Stub zone functions as a pointer that helps a DNS client locate the authoritative DNS servers for name resolution.

Start of Authority (SOA) record

The SOA or Start of Authority record indicates the authoritative server for the domain and the responsible administrator for the zone.