Computer Networking
Which of the following layer protocols are responsible for user and the application programme support such as passwords, resource sharing, file transfer and network management?

Layer 7 protocols
Layer 6 protocols
Layer 4 protocols
None of these
Layer 5 protocols

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Computer Networking
The packets switching concept was first proposed

in the late 1950s for Defense Ministry of US
All of these
in the late 1980s for the Defense Ministry of US.
in the early 1960s for military communication systems, mainly to handle speech
None of these

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