The CPS decision will come less than 24 hours after the Football Association banned Liverpool striker Luis Suarez for eight matches for racially abusing Manchester United defender Patrice Evra.
Villas-Boas admitted the punishment sent out a strong message but was reluctant to comment further on it before seeing the full judgment of the independent disciplinary committee.
Terry's altercation with Ferdinand is also the subject of an FA probe and Villas-Boas said of the Suarez verdict: "I'm not sure and I'm not in a position to say whether it's fairly applied or not.
"It looks to be setting a firm example."
A person guilty of this offence is liable on summary conviction to imprisonment for a term not exceeding six months, or to a fine not exceeding level 4 on the standard scale (s.29(3)).
Coincidence or what?3 - John Terry has been given more yellow cards for dissent or foul language than any other player in the Premier League this season.