Week01
Which IPv4 to IPv6 transition technology works through NAT IPv4 routers by establishing tunnel endpoints behind non-IPv6 routers that encapsulate IPv6 packets with UDP datagrams?
Answer
ISATAP
Teredo
6 to 4
NAT Converter
Teredo
Each node or leaf in the DNS tree is referred to as which of the following?
a. Setting
b. Resource record
c. Property
d. Row
Resource record
Which of the following is one of the primary advantages to using Active Directory to store DNS information?
Answer
Fault tolerance
Zero configuration
Low maintenance
Reverse zone lookups
Fault tolerance
Which of the following is the default lease period for DHCP dynamic address allocation?
Answer
96 hours
3.5 days
4.5 days
8 days
96 hours
When configuring split scopes for DHCP, which of the following is the traditional percentage split of the scope range?
Answer
50% to the primary server, 50% to the secondary server
60% to the primary server, 40% to the secondary server
70% to the primary server, 30% to the secondary server
80% to the primary server, 20% to the secondary server
50% to the primary server, 50% to the secondary server
Certain IPv6 addresses can be contracted. Which of the following is the shortened form of 21cd:0053:0000:0000/64?
Answer
21cd:53::/32
21cd::53::/64
0:21cd:53::/64
21cd:53::/64
21cd:53::/64
The main page of a company’s intranet portal is accessible by the FQDN home.na.adatum.corp. Which of the following actions should be taken to configure an entry in the GlobalNames zone for this?
Answer
Add a single A record with the IP of one of the web servers hosting the portal.
Add a single CNAME record pointing to the A record in another zone.
Add multiple CNAME records pointing to all the A records in the other zones.
Add multiple A records with all the IPs of the web servers hosting the portal.
Add a single CNAME record pointing to the A record in another zone.
Which DHCP client option is used to provide a list of domain names to use in name resolution queries?
Answer
Option 3
Option 6
Option 15
Option 44
Option 15
By default, how often does a backup of the DHCP database occur?
Answer
Every 60 minutes
Every 120 minutes
Every 8 hours
Every 24 hours
Every 168 hours
Every 60 minutes
Which of the following is the primary reason IPv6 has not completely replaced IPv4?
Answer
Administrators are hesitant and reluctant to change.
Stopgap technologies have been introduced, such as Network Address Translation (NAT) and classless interdomain routing (CIDR).
IPv4 addresses have only been depleted since early 2011.
IPv6 has already completely replaced IPv4 on the Internet.
Administrators are hesitant and reluctant to change.
Regarding DNSSEC, once a zone is signed, the new record(s) created is(are) which of the following?
Answer
Key Signing Key
Zone Signing Key
Trust anchor
DNSSEC resource records
Key Signing Key
Which of the following is the purpose of a priority number in MX records?
Answer
To set delivery priority
To designate primary, secondary, and so forth, mail servers
For fault tolerance
For mail-routing preference
To set delivery priority
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
User class
Vendor class
MAC address
Client identifier
Which of the following features needs to be installed to compact the DHCP database?
Answer
DNS
WINS
Windows Backup
File Services
WINS
Specify the correct order of steps necessary to calculating an IPv4 subnet mask.
a. Calculate the subnet mask by adding the network and subnet bits in binary form and converting the binary value to decimal.
b. Take the least significant subnet bit and the host bits, in binary form, and convert them to a decimal value.
c. Determine how many subnet identifier bits you need to create the required number of subnets.
d. Subtract the subnet bits you need from the host bits and add them to the network bits.
e. Increment the network identifier (including the subnet bits) by the decimal value you calculated to determine the network addresses of your new subnets.
1-C Determine how many subnet identifier bits you need to create the required number of subnets.
2-D Subtract the subnet bits you need from the host bits and add them to the network bits.
3-A Calculate the subnet mask by adding the network and subnet bits in binary form and converting the binary value to decimal.
4-B Take the least significant subnet bit and the host bits, in binary form, and convert them to a decimal value.
5-E Increment the network identifier (including the subnet bits) by the decimal value you calculated to determine the network addresses of your new subnets.
Specify the correct order of steps necessary to deploying DNS. Not all steps will be used.
_____ Configure the DNS server.
____ Configure the clients to use DNS servers.
_____ Add resource records to the forward and reverse lookup zones.
_____ Migrate resource records from a database.
_____ Install DNS on one or more servers.
_____ Configure sequence numbers.
_____ Create forward and reverse lookup zones.
2_____ Configure the DNS server.
5_____ Configure the clients to use DNS servers.
4_____ Add resource records to the forward and reverse lookup zones.
_____ Migrate resource records from a database.
1_____ Install DNS on one or more servers.
_____ Configure sequence numbers.
3_____ Create forward and reverse lookup zones.
Describe the definition of a zone transfer.
The complete or partial transfer of DNS data from a zone on a DNS server to another DNS server
Zone transfers are the complete or partial transfer of DNS data from a zone on a DNS server to another DNS server.
Identify the machine that always initiates the communication between the DHCP server and the client in lease negotiation.
The client
The client always initiates DHCP communication.
Specify the correct order of steps necessary to configuring a split scope by placing the number of the step in the appropriate space. Not all steps will be used.
_____ Create the scope on the primary server.
_____ Increase the delay for the primary server.
_____ Increase the delay for the secondary server.
_____ Specify the percentage of split.
_____ Create the scope on the secondary server.
_____ Run the DHCP Split-Scope Configuration Wizard.
1_____ Create the scope on the primary server.
_____ Increase the delay for the primary server.
4_____ Increase the delay for the secondary server.
3_____ Specify the percentage of split.
_____ Create the scope on the secondary server.
2_____ Run the DHCP Split-Scope Configuration Wizard.
Describe how IPv6 multicast addresses always begin.
Multicast addresses always begin with an FP value of 11111111, in binary, or ff in hexadecimal.
Multicast addresses always begin with an FP value of 11111111, in binary, or ff in hexadecimal. The entire multicast address format is as follows:
FP: An 8-bit field that identifies the message as a multicast
Flags (4 bits): A 4-bit field that specifies whether the multicast address contains the address of a rendezvous point (0111), is based on a network prefix (0010), and is permanent (0000) or transient (0001)
Scope: A 4-bit field that specifies how widely routers can forward the address; values include interface-local (0001), link-local (0010), site-local (0101), organization-local (1000), and global (1110)
Group ID: A 112-bit field uniquely identifying a multicast group
When disabling recursion in the Advanced properties of a DNS server, identify what else is also being disabled for that server.
Forwarding
Disabling recursion for a DNS server also disables the ability for that DNS server to use forwarders.
Explain DNS aging and scavenging.
Aging uses time stamps for tracking the age of dynamically registered resource records; scavenging uses specified refresh time periods to remove stale resource records.
To help with stale data, you can configure zone scavenging to clean up the stale records. Aging in DNS is the process of using time stamps to track the age of dynamically registered resource records. Scavenging is the mechanism to remove stale resource records.
Identify what an administrator can configure to ensure that a DHCP client always receives the same IP address, while taking advantage of the benefits of DHCP?
A DHCP reservation
DHCP client reservations allow administrators to reserve an IP address for permanent use by a DHCP client. By using reservations, you can ensure that the host will always have the same IP address. As with any other lease, when a client receives a reserved address, the client also receives all assigned options such as addresses of the default gateway and DNS servers. If these options are changed, they will automatically be updated on the client when the lease is renewed.
Describe how many Windows firewall rules are created to support DHCP failover when DHCP is installed.
Two
The DHCP installation automatically creates the following inbound and outbound firewall rules: