In the OSI model, where does PPTP encryption take place?
A.
Transport layer
B.
Application layer
C.
Data link layer
D.
Network layer
where does PPTP encryption take place?
In the OSI model, where does PPTP encryption take place?
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In the OSI model, where does PPTP encryption take place?
In the OSI model, where does PPTP encryption take place?
A.
Transport layer
B.
Application layer
C.
Data link layer
D.
Network layer
C
Point-2-Point Tunneling occurs at the transport layer, uses TCP port 1723 (generally)
It’s a tunnelling protocol. It creates a layer 2 tunnel at layer 4. The encryption is applied within the tunel, so that is layer 2 or data link layer.
Think of it this way, it’s creating a VPN, or a virtual LAN connection to your network. The LAN connection is a layer 2 (data link layer) connection. So, the PPTP connection (the traffic inside the PPTP) is layer 2 also.
L2TP also works this way.
IPSec is at the network layer (layer 3).
C is correct.