GSLC · Question #457
You work as a Network Administrator for Tech Perfect Inc. The company has a Linux-based network. You have configured a VPN server for remote users to connect to the company's network. Which of the…
The correct answer is D. 3DES. Linux VPN implementations (such as IPsec) use 3DES as a standard symmetric encryption algorithm for securing VPN tunnels.
Question
You work as a Network Administrator for Tech Perfect Inc. The company has a Linux-based network. You have configured a VPN server for remote users to connect to the company's network. Which of the following encryption types will Linux use?
Options
- ACHAP
- BMSCHAP
- CRC2
- D3DES
How the community answered
(25 responses)- A4% (1)
- B4% (1)
- D92% (23)
Why each option
Linux VPN implementations (such as IPsec) use 3DES as a standard symmetric encryption algorithm for securing VPN tunnels.
CHAP (Challenge Handshake Authentication Protocol) is an authentication protocol, not an encryption algorithm, so it does not encrypt VPN tunnel data.
MS-CHAP is a Microsoft-specific authentication protocol designed for Windows environments, not a Linux VPN encryption standard.
RC2 is a block cipher considered weak and deprecated, and is not a standard encryption algorithm used in Linux VPN configurations.
3DES (Triple DES) is a symmetric block cipher widely supported in Linux VPN implementations, particularly IPsec. It encrypts data three times using DES, providing stronger security than single DES. Linux-based VPN solutions such as StrongSwan and OpenSwan support 3DES as a core encryption algorithm for IKE and ESP payloads.
Concept tested: Linux VPN encryption algorithm selection
Source: https://wiki.strongswan.org/projects/strongswan/wiki/IKEv2CipherSuites
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