Peter works as a Network Administrator for Net World Inc. The company wants to allow remote users to connect and access its private network through a dial-up connection via the Internet. All the data will be sent across a public network. For security reasons, the management wants the data sent through the Internet to be encrypted. The company plans to use a Layer 2 Tunneling Protocol (L2TP) connection.
Which communication protocol will Peter use to accomplish the task?
- IP Security (IPSec)
- Microsoft Point-to-Point Encryption (MPPE)
- Pretty Good Privacy (PGP)
- Data Encryption Standard (DES)
Answer(s): A
Explanation:
According to the question, all the data will be sent across a public network. Data sent through a public network such as the Internet should be encrypted in order to maintain security.
The two modes available for data encryption are Microsoft Point-to-Point Encryption (MPPE) and IP Security (IPSec). The MPPE protocol is used for data encryption in a PPTP connection. It supports MSCHAP v1 and v2, and the EAP-TLS authentication methods. However, L2TP does not support the MPPE protocol. Therefore, for an L2TP connection, Peter will have to use the IPSec protocol to encrypt data. L2TP with IPSec needs a certificate authority server (CA server) to generate certificates as well as to check their validity for providing secure communication across both ends of the VPN.
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