# Virtual Private Networks (VPN) The ESP Protocol provides data confidentiality and authentication. > True Which of the following is an important security feature in CHAP > It periodically re-authenticates Openswan is a VPN solution provided by CISCO. > False Which authentication protocols are available under PPTP? > EAP, CHAP PPTP is an acronym for which of the following? > Point-to-Point Tunneling Protocol What does L2TP stand for? > Layer 2 Tunneling Protocol PPTP is based on which protocol? > PPP What is the purpose of IKE? > Key exchange Which of the following is a weakness in PPTP? > No encryption Which of the following is generally considered the least secure? > PAP --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://wiki.zacheller.dev/network-security/courses/isci-cnss-course/virtual-private-networks-vpn.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.