200-301: Cisco Certified Network AssociateDemo

By Cisco · Question Mode

QuestionQ344

Security Fundamentals

Which encryption mode is used when a packet is sent from a site-to-site VPN connection in which the source and destination IP address portion of the packet is not encrypted?

  • A PPTP
  • B Secure Shell
  • C Transport
  • D PPPoE
Explanation

Transport mode leaves the original IP header intact, so the source and destination IP addresses remain unencrypted while the payload is protected. In contrast, tunnel mode encrypts the entire original IP packet and adds a new outer header.

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