Domain Name Space o Hierarchical name space o Using an inverted -tree structure where o root is at the top o the tree has 128 levels(0 to 127) o each level defines a hierarchical level each node has a label having maximum of 63 characters
6 Domain Name Space Hierarchical name space Using an inverted-tree structure where ⚫ root is at the top ⚫ the tree has 128 levels (0 to 127) ⚫ each level defines a hierarchical level ⚫ each node has a label having maximum of 63 characters
Figure: Domain Name Space arpa como edu g d 8o bb
7 Figure: Domain Name Space
Label o Root label is a null string(empty string o Children of a node have different labels
8 Label Root label is a null string (empty string) Children of a node have different labels
Domain name o Each node in the tree represents a domain name o a full domain name is a sequence of labels separated by dots(.) o The domain names are read from the node up to the root o The last label is the label of the root (null)
9 Domain Name Each node in the tree represents a domain name A full domain name is a sequence of labels separated by dots (.). The domain names are read from the node up to the root. The last label is the label of the root (null)
Root Domain names Label and labels du edu. Domain name Label fhdafhda.edu. Domain name Label atcO atc thda.edu. Domain name Label challenger challenger. atc. fda.edu. I Domain name
10 Domain names and labels