Implementing and Operating Cisco Security Core Technologies (SCOR) Practice Mode

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose CD1

  C and D are the correct Answers. AES always uses a fixed block size of 128 bits (16 bytes). This is true for all AES variants (AES-128, AES-192, AES-256).

• Chose CD1

  C and D are correct

• 4

  C. 128-bit block size, 192-bit key length D. 128-bit block size, 256-bit key length AES (Advanced Encryption Standard) is a symmetric-key encryption algorithm that supports several key and block sizes. The most commonly used key sizes for AES are 128-bit, 192-bit, and 256-bit. The block size is always fixed at 128-bit. AES-128 uses a 128-bit key length and 128-bit block size AES-192 uses a 192-bit key length and 128-bit block size AES-256 uses a 256-bit key length and 128-bit block size Option A and B are not correct because AES does not support 64-bit block size. Option E is not correct because AES does not support 192-bit block size AES-128, AES-192, and AES-256 are the valid key sizes for AES. The block size is always fixed at 128-bit.