CISSP-ISSMP · Question #66
CISSP-ISSMP Question #66: Real Exam Question with Answer & Explanation
The correct answer is D: UDP port 1701. Layer 2 Tunneling Protocol (L2TP) is a more secure version of Point-to-Point Tunneling Protocol (PPTP). It provides tunneling, address assignment, and authentication. L2TP allows transfer of Point- to-Point Protocol (PPP) traffic between different networks. L2TP combines with IPS
Question
Which of the following ports is the default port for Layer 2 Tunneling Protocol (L2TP) ?
Options
- AUDP port 161
- BTCP port 443
- CTCP port 110
- DUDP port 1701
Explanation
Layer 2 Tunneling Protocol (L2TP) is a more secure version of Point-to-Point Tunneling Protocol (PPTP). It provides tunneling, address assignment, and authentication. L2TP allows transfer of Point- to-Point Protocol (PPP) traffic between different networks. L2TP combines with IPSec to provide both tunneling and security for Internet Protocol (IP), Internetwork Packet Exchange (IPX), and other protocol packets across IP networks. UDP port 1701 is the default port for L2TP. Answer option A is incorrect. UDP port 161 is the default port for Simple Network Management Protocol (SNMP). Answer option B is incorrect. TCP port 443 is the default port for Hypertext Transfer Protocol Secure (HTTPS) and Secure Socket Layer (SSL). Answer option C is incorrect. TCP port 110 is the default port for Post Office Protocol version 3
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