Bail in the federal system is very different than bail in the state system. If the prosecutor asks for a person to be held without bail, you have a right to a hearing to determine whether you should be released until your trial date. That hearing is usually three business days after your first appearance in court. If the magistrate judge determines that bail is appropriate, she will set bond conditions that she believes will ensure you appear in court when required.
There are many different types of bail terms, some of which may require money to be deposited with the court or additional family and friends to sign. Bail bondsmen are rarely used in the federal system, so please speak to the attorney handling the case prior to contracting a bails bondsman for a federal case.