Computer Networking
End-to-end connectivity is provided from host-to-host in:

Session layer
None of these
Transport layer
Network layer
Data link layer

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Computer Networking
The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

None of these
to assign address to private network DTEs
A and B both
adequate cost control mechanisms for administration of the private networks
universal accessibility for private network Data Terminal Equipment (DTE)

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