[karthie_a]

this is historic practise in any secure work environment , like govt departments ,healthcare,financial institutions,pharma and energy. based on level of protection required they lock the access accordingly. allowing USB in work station is not allowed generally by any employer. In most secure environments they disconnect your work station from outside world and is generally connected only to internal network. If you require internet access you can apply for it and get approved,which will be monitored by the network admins.