Known-Length Request {
  Framing Indicator (i) = 0,
  Request Control Data (..),
  Known-Length Field Section (..),
  Known-Length Content (..),
  Known-Length Field Section (..),
  Padding (..),
}

Known-Length Response {
  Framing Indicator (i) = 1,
  Known-Length Informational Response (..) ...,
  Final Response Control Data (..),
  Known-Length Field Section (..),
  Known-Length Content (..),
  Known-Length Field Section (..),
  Padding (..),
}

Known-Length Field Section {
  Length (i),
  Field Line (..) ...,
}

Known-Length Content {
  Content Length (i),
  Content (..),
}

Known-Length Informational Response {
  Informational Response Control Data (..),
  Known-Length Field Section (..),
}