Which type of data could reasonably be expected to cause damage to national security?

Secret

Controlled Unclassified Information $($CUI$/$

How can you protect yourself on social networking sites?

Turn on Global Positioning System $($CPS$)$ location geotagging

Establish privacy settings and assume the available options will remain consistent

Assume that people are who they'say they are on social networking sites

Validate connection requests through another source if possible$)$

Cxmfitidential

Top Secret