DNS Levels
The Database
Serve it up
Here, it’s yours
Ones & Zeros
100
The highest level in DNS
What is root
100
An address record
What is A
100
The database files for a domain or subdomain
What is a zone file
100
A contiguous range of numeric IP addresses
What is an address pool
100
The initial value of the client IP address field when the client initially boots up
What is 0.0.0.0
200
.com
What is a top level name
200
A namespace record
What is NS
200
The process when a secondary server updates its database
What is a zone transfer
200
The four packet sequence used to obtain an IP address, lease time, and configuration parameters
What is DHCP discovery
200
This specifies the number of seconds that should be allowed to elapse before the zone database is no longer authoritative.
What is expire
300
A fully qualified domain name ends with this
What is a period
300
A pointer record
What is PTR
300
Does not participate in database updates but can respond to DNS queries
What is a caching server
300
The process of contacting any DHCP server through a broadcast message to obtain a renewal of an address
What is rebinding process
300
DHCP clients use this type of addressing after they obtain an IP address
What is unicast
400
Collegeamerica
What is an example of a domain
400
A text record
What is TXT
400
The first file examined during a lookup process
What is the hosts file
400
DHCP replaced this protocol for the most part
What is BOOTP
400
This is equal to one-half of the DHCP least time
What is T1 or renewal time
500
www
What is an example of a subdomain
500
A mail exchange record
What is MX
500
The first record in a DNS file
What is the SOA
500
This is required when a DHCP server does not exist on the current network segment
What is a DHCP relay agent
500
The four packets used in obtaining a DHCP address
What are the Discover, Offer, Request and Acknowledgement packets
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