Questions

Now, it's time to check your knowledge. Select the best response, and then check your answers, which can be found in the Assessment appendix:

1. _____ servers are name servers that respond to queries housed within the root zone and are an essential component of resolving addresses.
   1. Recursive
   2. Root
   3. Redundant
   4. Caching
2. Within any DNS structure, there must be a(n) _____ DNS server that holds a master set of records for the domain and is updated whenever there is a change.
   1. recursive
   2. redundant
   3. authoritative
   4. caching
3. There are many types of DNS RR. A type 12 _____ converts an IP address to a domain name.
   1. AXFR
   2. MX
   3. AAAA
   4. PTR
4. When set, the _____ flag will indicate whether the message is shortened because it exceeds the limit of 512 bytes for a UDP packet.
   1. recursive
   2. caching
   3. blunted
   4. truncated
5. Experiencing a disproportionately large amount of DNS responses can indicate that a DNS _____ attack may be at play.
   1. spoofing
   2. DoS
   3. truncating
   4. cache poison
6. Within the DNS question section...