VPN Protocols

Question 1

IPSec with IKEv1

Answer 1

IPSec uses a collection of protocols to provide its features. One of the primary protocols used is Internet Key Exchange (IKE). IPSec can provide encryption between authenticated peers using encryption keys, which are periodically changed. IKE, allows an administrator to manually configure keys

Question 2

SSL

Answer 2

• Secure Sockets Layer provides cryptographhy and reliability for upper layers (layers 5-7) of the OSI model.
• Has been largely replaced by TLS Transport Layer Security.
• both SSL and TLS provide secure web browsing via Hypertext Transfer Protocol Secure (HTTPS)

Question 3

L2TP

Answer 3

• Layer 2 Tunneling Protocol is a VPN protocol that lacks security features, such as encryption.
• L2TP can still be used for a secure VPN connection when combined with another protocol that does provide encryption

Question 4

L2F

Answer 4

• Layer 2 Forwarding is a VPN protocol designed (by Cisco) with the intent of providing a tunneling protocol for PPP.
• Like L2TP, L2F lacks native security features

Question 5

PPTP

Answer 5

• Point to Point Tunneling Protocol is an older VPN protocol (supported dial up networking in older microsoft).
• Like L2TP and L2F, PPTP lacks native security features. * Older versions of PPTP bundled with various versions of microsoft windows were enhanced to offer security features.

Question 6

TLS

Answer 6

• Transport Layer Security has largely replaced SSL as the VPN protocol of choice for providing cryptography and reliability to upper layers of the OSI model.
• When you securely connect to a website using HTTPS, you are probably using TLS.