70-649 · Question #40
70-649 Question #40: Real Exam Question with Answer & Explanation
The correct answer is B. Create an SSTP VPN connection.. Secure Socket Tunneling Protocol (SSTP) is a tunneling protocol that uses the HTTPS protocol over TCP port 443 to pass traffic through firewalls and Web proxies that might block PPTP and L2TP/IPsec traffic. SSTP provides a mechanism to encapsulate PPP traffic over the Secure Sock
Question
Options
- ACreate an IPsec tunnel.
- BCreate an SSTP VPN connection.
- CCreate a PPTP VPN connection.
- DCreate an L2TP VPN connection.
Explanation
Secure Socket Tunneling Protocol (SSTP) is a tunneling protocol that uses the HTTPS protocol over TCP port 443 to pass traffic through firewalls and Web proxies that might block PPTP and L2TP/IPsec traffic. SSTP provides a mechanism to encapsulate PPP traffic over the Secure Sockets Layer (SSL) channel of the HTTPS protocol. The use of PPP allows support for strong authentication methods, such as EAP-TLS. SSL provides transport-level security with enhanced key negotiation, encryption, and integrity checking. Although it is closely related to SSL, a direct comparison can not be made between SSL and SSTP as SSTP is only a tunneling protocol unlike SSL. Many reasons exist for choosing SSL and not IPSec as the basis for SSTP. IPSec is directed at supporting site- to- site VPN connectivity and thus SSL was a better base for SSTP development, as it supports roaming.
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