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

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

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Computer Networking
ARP (Address Resolution Protocol) is

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

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