The Chelsea skipper had denied the charge but an FA independent regulatory commission ruled he was guilty of misconduct during the Premier League defeat at QPR on 23
Terry, 31, is considering an appeal, but questions have been asked why the ban imposed was only half the length of Liverpool's
Senior figures in football's anti-racism movements have privately queried the difference, but are unlikely to speak publicly until the appeals process is completed.
Terry expressed disappointment after the outcome, pointing out he was found not guilty in magistrates court in July of a racially-motivated public order offence in connection with the same incident.
A statement released on his behalf by Terry's representatives, Elite Management, read: "Mr Terry is disappointed that the
"He has asked for the detailed written reasons of the decision and will consider them carefully before deciding whether to lodge an appeal."
Terry had been accused of calling Ferdinand a 'f****** black c***' as an insult. He admitted using the words, but insisted he had only been repeating words he thought Ferdinand had accused him of saying.
The written reasons will also provide the explanation for the difference in length of ban compared to Suarez.
The most likely outcome is that Terry only said the insult once, while Suarez was judged by his panel to have called Evra 'negro' up to seven times. Suarez was also fined around a week's wages - in his case £40,000 ($62,175).
Terry is likely to still be available to play for Chelsea against Arsenal this weekend as the ban does not start until after the appeals process has been concluded.
The defender has 14 days from the receipt of the written reasons for the decision, and if he does appeal then that hearing may not take place until the end of next month.
That could see the Chelsea captain still being available for the club's other Premier League matches in October against Norwich City, Tottenham Hotspur and Manchester United.
Chelsea issued a statement which read it 'respected' the verdict - a different response to the stance taken by Liverpool over Suarez.
The statement read: "
"We also recognise that John has the right to appeal that decision.
"It is therefore inappropriate for us to comment further on the matter at this time."
The case centred around an incident during Chelsea's Premier League defeat at QPR when Terry and Ferdinand clashed verbally on a number of occasions.
The FA's decision to press ahead with its own charges infuriated Terry to the extent that on Sunday, on the eve of the disciplinary hearing he announced he was quitting international football with immediate effect, saying his position was 'untenable'.
The FA has not provided any details about the decision, a statement merely laying out the outcome.
The FA statement read: "An independent regulatory commission has today found a charge of misconduct against
"The charge was the result of The FA's long-standing investigation into this matter, which was placed on hold at the request of the Crown Prosecution Service and Mr Terry's representatives pending the outcome of the criminal trial."
English Premier League