Homework Help: Questions and Answers: What type of hashing does the service password-encryption apply to passwords in the config file?
A. RIPEMD
B. MD4
C. MD5
D. SHA-1
Answer:
Answer:
First, let’s understand service password-encryption:
The command service password-encryption
in Cisco devices applies a weak form of encryption to passwords stored in the configuration file.
The correct type of hashing used is Type 7 encoding, which is not a true cryptographic hash like MD5, SHA-1, etc. It is a reversible encoding rather than a secure hash.
Given Options: Step by Step Answering
a) RIPEMD
- This is a cryptographic hash function, but it is not used by the
service password-encryption
command.
b) MD4
- This is also a cryptographic hash function, but it is not used by the
service password-encryption
command.
c) MD5
- This is another cryptographic hash function, commonly used for Type 5 password encryption in Cisco devices, but it is not used by the
service password-encryption
command.
d) SHA-1
- This is also a cryptographic hash function, but it is not used by the
service password-encryption
command.
Final Answer
None of these options exactly match the behavior of service password-encryption
. However, if we are strictly considering one-way hashing algorithms, the closest match would be C. MD5 because it’s the type used by Cisco for some other password-related operations, though not directly with the service password-encryption
command.
Closest matching option from the list: C. MD5.
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