Home » Microsoft » 70-688 » Which of the following should you use?
You administer Windows 8.1 Enterprise laptops. All of the computers are members of an Active Directory domain.
When traveling, users access the corporate network by using a virtual private network (VPN). There is an external firewall that allows connections only on TCP ports 80 and 443. You need to establish a VPN connection that is able to pass through the firewall.
Which of the following should you use?
A. EAP-TLS
B. MS-CHAP v2
C. 802.1X
D. RADIUS
E. PPTP
F. L2TP/IPSEC
G. IPSEC/IKEv2
H. SSTP
Correct Answer: H
Explanation/Reference:
Secure Socket Tunneling Protocol (SSTP) is a new 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.
Incorrect:
Not E: Point-to-Point Tunneling Protocol (PPTP) uses TCP port 1723 and IP port 47 Generic Routing Encapsulation (GRE).
Not F: Layer Two Tunneling Protocol (L2TP) uses TCP port 1701.
Not G: Internet Protocol Security (IPSec) uses IP protocol 50 for Encapsulated Security Protocol (ESP), IP protocol 51 for Authentication Header (AH), and UDP port 500 for IKE Phase 1 negotiation and Phase 2 negotiations.
Reference: VPN Tunneling Protocols
