You work as a Network Administrator for Blue Bell Inc. The company has a TCP-based network. The company has two offices in different cities. The company wants to connect the two offices by using a…

Question

Options

• AL2TP
• BHTTPS
• CSSL
• DIPSec

• A
  95% (52)
• B
  2% (1)
• D
  4% (2)

Explanation

L2TP (Layer 2 Tunneling Protocol) is correct because it was specifically designed to create tunnels across a public network, encapsulating data packets so they can travel securely between two private network endpoints - which is exactly what a VPN does when connecting two office locations. The word "tunneling" is literally embedded in its name, distinguishing it from other protocols whose primary purpose is different.

Why the distractors are wrong:

• HTTPS (B) is an application-layer protocol for secure web browsing - it uses encryption but is not a tunneling protocol for VPN infrastructure.
• SSL (C) is an encryption/authentication protocol; while SSL-based VPNs exist, SSL itself is a security layer, not a dedicated tunneling mechanism.
• IPSec (D) is a common companion to L2TP (the pair is called L2TP/IPSec) that handles encryption and authentication - IPSec secures the tunnel, but L2TP creates it.

Memory tip: The answer hides in plain sight - L2TP = Layer 2 Tunneling Protocol. On exams asking "which protocol tunnels?", look for the protocol that has "tunneling" in its actual name. Think of L2TP as the pipe, and IPSec as the lock on that pipe.

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