Designing Cisco Network Service Architectures (ARCH, legacy) — Question 28

Which two protocols support simple plaintext and MD5 authentication? (Choose two.)

Answer options

• A. EIGRP
• B. BGP
• C. RIP
• D. OSPF
• E. IPv6

Correct answer: A, D

Explanation

EIGRP and OSPF are the correct answers because both protocols provide support for simple plaintext authentication as well as MD5 authentication methods. BGP, while it does support authentication, does not use MD5 in the same way as EIGRP and OSPF, and RIP primarily focuses on simpler authentication methods without MD5. IPv6 is a protocol for internet layer communication and does not pertain to authentication methods.