Which primary security design components should be addressed while implementing secure
WAN solutions?(Not all design components are required.)
1. authentication and transmission protection
2. network infrastructure device hardening
3. boundary access control
4. topology
5. high availability
6. performance and scalability
7. resource separation

A.
1, 2, 4, 5, 6

B.
1, 2, 3, 4, 5

C.
1, 2, 3, 5, 6

D.
2, 3, 4, 5, 6