6. A host machine will cache the IP addresses of names previous resolved. What c

Question

6. A host machine will cache the IP addresses of names previous resolved. What command can be issued on the host's command line to see this cache? 7. A forward lookup uses DNS record types while reverse lookups use record types. IPv6 lookups use record types in DNS. 8. What does FQDN stand for? Give an example of a FQDN: The root of the Domain Name System (DNS) is represented as 9. 10. A computer can find the address of a domain name by using a locally stored file before asking a DNS server. What is the path and name of that file (in Windows OS)?

Explanation / Answer

1) DNS cache stores previously resolved ip addresses. we can use ipconfig/displaydns command to see the cache.

2) Forward lookup uses A (returns 32 bit ipv4 address) and AAAA ( returns 128 bit IPV6 address) DNS record.

reverse Dns lookup uses PTR record type ( pointer record) .

IPV6 uses AAAA type.

8) FQDN: fully qualified domain name - is the complete domain name. It consist of two parts ; hostname and domain name. It specifies all domain levels including top level domain and root zone.

Example www.microsoft.com.

9) root zones. It is the highest level in DNS hierarchy tree.

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