Application layer

made of several parts,The first part can define the nature of the organization, the second part can define the name of organization, the third part can define departments in the organization

• Flat Name Space

• Hierarchical name space

• name space

in the domain name ,the tree can have only 129 levels

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level 0 is called

• root

• leave

• parents

the first level in the generic domain section allows...........possible lables

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the (coop) in generic domains is label for :

• commercial organizations

• Cooperative Observer Program

• Cooperative business organizations

What is considred not disadvantages of flat name space

• that it cannot be used in a large system

• The names are unique without the need for assignment by a central authority

• must be centrally controlled to avoid ambiguity and duplication

TELNET enables the establishment of a connection to a remote system in such a way that the local terminal appears to be a terminal at the remote system.

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