Computer Networking
Which of the following describes an industry-wide standard suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer 3 Network layer of the OSI model?

HDLC
IPSec
VPN
xDSL
Cable

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Computer Networking
The network layer, in reference to the OSI model, provide

the virtual circuit interface to packet-switched service
All of these
the interface between the X.25 network and packet mode device
None of these
data link procedures that provide for the exchange of data via frames that can be sent and received

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