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Which SSH key type is recommended for modern key-based authentication due to better security and performance?

easy📝 Conceptual Q2 of 15
Linux CLI - SSH and Remote Access
Which SSH key type is recommended for modern key-based authentication due to better security and performance?
ADSA
BRSA
CECDSA
DEd25519
Step-by-Step Solution
Solution:

  1. Step 1: Understand common SSH key types

    DSA is outdated, RSA is widely used but slower, ECDSA is elliptic curve based but less recommended now.

  2. Step 2: Identify the modern recommended key type

    Ed25519 is newer, faster, and more secure, recommended for modern SSH keys.

  3. Final Answer:

    Ed25519 -> Option D

  4. Quick Check:

    Modern recommended key type = B [OK]
Quick Trick: Use Ed25519 keys for best security and speed [OK]
Common Mistakes:
  • Choosing RSA as the best modern key
  • Using deprecated DSA keys
  • Confusing ECDSA with Ed25519

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