How DNS Works
- DNS servers use UDP port 53 and sometimes TCP port 53
- the DNS root for the entire internet consists of 13 powerful DNS server clusters all over the world
-> has the complete definitive name resolution table
- Internet Corporation for Assigned Names and Numbers (ICANN): creates new TLDs
Name Spaces
- Hierarchical Name Space (used by DNS): an imaginary tree structure for possible names that can be used within a single system
-> enables administrators to give networked systems longer names
- Flat Name Space (used by HOSTS): an undivided list containing all names
-> all names must be absolutely unique
Are you taking practice tests? If so, how are you doing? If not, why not?
ReplyDelete