How are packet sniffers attacks mitigated in the SAFE SMR small network corporate Internet module?

A.
RFC 2827 and 1918 filtering at ISP edge and local firewall.

B.
Switched infrastructure and HIDS.

C.
Protocol filtering

D.
Restrictive trust model and private VLANs.

E.
Restrictive filtering and HIDS.

Explanation:
Mitigated Threats
Packet sniffers-Switched infrastructure and host IDS to limit exposure REF;Safe white papers;page 11
SAFE: Extending the Security Blueprint to Small, Midsize, and Remote-User Networks