Which of the following ports must be opened on the firewall for the VPN connection using Point-toPoint Tunneling Protocol (PPTP)?

A.
TCP port 110

B.
TCP port 443

C.
TCP port 5060

D.
TCP port 1723

Explanation:
The TCP port 1723 must be opened on the firewall for the Virtual Private Network
(VPN) connection using Point-to-Point Tunneling Protocol
(PPTP) .
Point-to-Point Tunneling Protocol (PPTP) is a remote access protocol. It is an extension of the Pointto-Point Protocol (PPP). PPTP is used to
securely connect to a private network by a remote client using a public data network, such as the
Internet. Virtual private networks (VPNs)
use the tunneling protocol to enable remote users to access corporate networks securely across the
Internet. PPTP supports encapsulation of
encrypted packets in secure wrappers that can be transmitted over a TCP/IP connection.
Answer option B is incorrect. Secure Sockets Layer (SSL) uses TCP port 443 as the default port.
Answer option C is incorrect. TCP/UDP port 5060 is used for the Session Initiation Protocol (SIP).
Answer option A is incorrect. TCP port 110 is the default port for POP3.