Regarding DNSSEC, which of the following is used to sign the DNSKEY records at the root of the zone?
answer
Key Signing Key.
question
What type of structure does DNS have?
answer
Hierarchical distributed.
question
What is the purpose of a priority number in MX records?
answer
To set a mail-routing preference
question
Which type of DNS zone resolves host names to IP addresses?
answer
A forward lookup zone.
question
The clients of your domain are part of adatum.corp. The main page of your company's Intranet portal is accessible by the FQDN home.na.adatum.corp. How would you configure an entry in the GlobalNames zone for this so that users can easily access the portal?
answer
By adding a single CNAME record pointing to the A record in another zone.
question
Which of the following statements best describes the net effect if recursion is disabled on a DNS server?
answer
The DNS server will be able to provide only answers to queries about internal DNS zones.
question
Which of the following terms best describes the network transmissions method where packets are sent from one host to all other hosts?
answer
Broadcast.
question
Which of the following represents the correct default subnet mask used with Class A networks?
answer
255.0.0.0
question
Regarding DNSSEC, which of the following terms describes the new records created once a zone is signed?
answer
DNSSEC resource records.
question
Which of the following terms best describes the network transmissions method where packets are sent from one to a specific group of other hosts?
answer
Multicast.
question
Which of the following statements best describes the function of the NSEC record?
answer
The NSEC record is returned to positively deny that the requested A record exists in the zone.
question
Which of the following values is considered to be the optimal setting for DNS Cache Locking?
answer
100.
question
Regarding DNSSEC, against which of the following will DNS clients verify digital signatures returned alongside a requested resource record?
answer
Trust Anchor.
question
Which database engine is used for the DHCP database in Windows Server 2012 R2?
answer
Jet.
question
By default, the DHCP Server service in Windows Server 2012 R2 uses dynamic allocation, leasing IP addresses to clients for how many days?
answer
6 days.
question
Which value represents the default size of the DNS socket pool?
answer
2,500
question
On which port does DHCP failover listen for failover traffic?
answer
TCP port 647.
question
Which feature of Windows Server 2012 R2 DNS is intended to eliminate the need for WINS by providing support for single label names?
answer
GlobalNames zone.
question
Which of the following commands would correctly set the DNS socket pool to a value of 7,000?
answer
dnscmd /Config /SocketPoolSize 7000.
question
Which of the following is not an advantage provided by the distributed DHCP infrastructure?
answer
Clients have the ability to install and configure a large number of DHCP servers.
question
Which part of a MAC address identifies the company that made the adapter?
answer
Organizationally Unique Identifier.
question
Which of the following terms describes one of the primary advantages to using Active Directory to store DNS information?
answer
Fault tolerance.
question
Which of the following services relies on SRV records?
answer
AD Server.
question
IPv4 addresses use an address space that is _____ bits long; IPv6 addresses use an address space that is _____ bits long.
answer
32,128.
question
Which of the following statements best describes an advantage of DNS subdomains?
answer
Subdomains allow you to organize resources.
question
Regarding DNSSEC, which of the following is used to sign the zone data?
answer
Zone Signing Key.
question
Which kind of DNS record should be created when you have a server named server1.blah.com, want to use it as your web server, and have requests point to www.contoso.com?
answer
A CNAME record.
question
What is the major reason supporting the use of a forwarder?
answer
To improve the efficiency of name resolution for your computers.
question
How are values for DNS Cache Locking expressed?
answer
As a percentage of the TTL.
question
Which of the following statements best describes Time to Live (TTL) in DNS parlance?
answer
Time to Live (TTL) is the length of time a record remains in DNS cache.
question
Which DNS record contains the serial number for the zone?
answer
SOA Record.
question
By using the Active Directory-integrated zone, DNS follows which of the following types of models?
answer
A multi-master model.
question
Which of the following naming resolution services provide NetBIOS names to IP addresses?
answer
WINS.
question
You have three domains within your organization: contoso.com, adatum.com, and litware.com. You want to specify FQDN-based condition based on the DNS suffix. Which of the following can be used?
answer
DHCP policy.
question
Which of the following represents the best usage of a superscope in DHCP?
answer
To add more IP addresses in a new subnet.
question
When configuring DHCP failover partners, the time synchronization between the partners is critical. What is the maximum allowable time skew between DHCP failover partners?
answer
60 seconds.
question
Which of the following terms represents another term used to describe a DNS client?
answer
DNS resolver.
question
Which of the following criteria can be used to create conditions in a DHCP policy? (Choose all that apply.)
answer
User Class, Vendor Class, MAC address, Client identifier.
question
On which of the following DNS zone types can DNSSEC be enabled? (Choose all that apply.)
answer
A standard primary forward lookup zone, An Active Directory integrated reverse lookup zone.
question
Which of the following values represents the memory used by 10,000 DNS records?
answer
1 MB.
question
In Windows Server 2012 R2, before a DHCP server can hand out addresses, which of the following steps must be completed?
answer
The DHCP scope must be created and activated.
question
What is the purpose of DNS Cache Locking?
answer
It prevents an attacker from replacing records in the resolver cache while the Time to Live (TTL) is still in force.
question
Which of the following terms best describes the primary advantage to enabling round-robin DNS?
answer
Load-balancing.
question
Which of the following DNS zones are replicated to all domain controllers within the forest?
answer
ForestDNS zones application partition.
question
By default, after how much time has elapsed in an active DHCP lease will a Windows client computer attempt to renew the lease?
answer
50 percent of the lease time.
question
Which of the following terms describe reasons to install multiple DNS servers (Choose all that apply.)
answer
Fault tolerance, Performance.
question
Which of the following IPv6 address types is best used for hosts that are reachable from the Internet?
answer
Global Unicast Address.
question
When configuring Split Scopes for DHCP, what is the traditional percentage split of the scope range?
answer
80% to the primary server, 20% to the secondary server.
question
What is the function of the RRSIG record?
answer
It is returned to the client in response to a successful query along with the A record.
question
Which of the following DNS security features in Windows Server 2012 R2 can be configured to allow source port randomization for DNS queries?
answer
Socket pool.
question
IPv6 addresses are written using which of the following number systems?
answer
Hexadecimal.
question
Which of the following networks represents the multicast network space, as defined?
answer
224.0.0.0 to 239.255.255.255
question
Which of the following is an example of a second-level domain?
answer
contoso.com
question
Before creating PTR records, which of the following DNS objects must be created?
answer
Reverse lookup zones
question
When creating a multicast scope in Windows Server 2012 R2, which of the following values represents the default lease time?
answer
30 days.
question
Which protocol transmits a Neighbor Solicitation message to determine whether any other computer on the link is using the same IPv6 address?
answer
IPv6 Neighbor Discovery.
question
DNSSEC uses public key infrastructure (PKI) encryption to provide which of the following assurances to DNS clients? (Choose all that apply.)
answer
Proof of identity of DNS records, Verified denial of existence.
question
Which of the following steps must be completed in order to ensure a network printer is assigned the same address through the DHCP server?
answer
You must create a reservation in the DHCP scope.
question
If an A record maps a host name to an IP address, what does an AAAA record do?
answer
It maps to a host name to a single IPv6 address.
question
Which of the following terms best describes the configurable objects in DHCP that contain the range of IP addresses that can be allocated to clients?
answer
DHCP scopes.
question
Which of the following can be used to make sure certain devices do not get a DHCP address?
answer
Use a DHCP link-layer filter
question
Which of the following terms best describes the special resource record that Windows Server 2012 R2 DHCP will create to track which machine originally requested a specific name in DNS?
answer
Dynamic Host Configuration Identifier.
question
Which of the following is a disadvantage of a centralized DHCP infrastructure?
answer
Increased burden on the servers.
question
Which of the following DHCP high-availability options in Windows Server 2012 R2 allows you to configure two servers to provide DHCP with a load sharing arrangement?
answer
DHCP failover.
question
Which of the following is the first and most important step in installing and deploying DNS in your network?
answer
Planning the infrastructure and service requirements.
question
Which of the following is an example of a top-level domain on the Internet?
answer
.net
question
After a DNS zone has been secured with DNSSEC, what additional data will be returned to a client as a result of a query?
answer
Digital signatures for the returned records will be returned.
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