H12-821_V1.0 · Question #877
One of the features of OSPF is that it only supports MD5 authentication.
The correct answer is B. FALSE. B is correct because OSPF actually supports multiple authentication types, not just MD5. The three supported types are: Type 0 (Null - no authentication), Type 1 (Plain-text/Simple password), and Type 2 (MD5 cryptographic hash). Saying OSPF "only supports MD5" ignores the other…
Question
Options
- ATRUE
- BFALSE
- C
- D
How the community answered
(21 responses)- A5% (1)
- B81% (17)
- C10% (2)
- D5% (1)
Explanation
B is correct because OSPF actually supports multiple authentication types, not just MD5. The three supported types are: Type 0 (Null - no authentication), Type 1 (Plain-text/Simple password), and Type 2 (MD5 cryptographic hash). Saying OSPF "only supports MD5" ignores the other two methods entirely.
A (TRUE) is wrong because it accepts the false premise at face value - the word "only" is the trap. MD5 is the strongest and most commonly recommended OSPF authentication method, which may make the statement seem plausible, but OSPF was designed with flexibility to support all three types.
Memory tip: Think of OSPF authentication as a security ladder - None → Plain-text → MD5 (0 → 1 → 2). If OSPF only had MD5, there'd be no ladder, just one rung. Any time an exam question uses "only" with a protocol feature, treat it as a red flag and verify whether alternatives exist.
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