Computer Networking
Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:

Network operating system
Network Server
OSI
Virtual Private Network

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Computer Networking
HMP (Host Monitoring Protocol) is:

a protocol that handles error and control messages
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a TCP/IP high level protocol for transferring files from one machine to another.
a protocol used to monitor computers
None of these

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