> For the complete documentation index, see [llms.txt](https://wiki.zacheller.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.zacheller.dev/network-security/courses/isci-cnss-course/virtual-private-networks-vpn.md).

# 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