A protocol processing engine system, which is arranged between a host side and a media access control layer to thus speed up data transmission. User credentials for the remote computer application are stored in a central repository that is accessible through the network. The first cylindrical portion has a larger rolling diameter than the second cylindrical portion. The ends are sufficiently separated by the elongated optical elements, such that high temperatures exerted on the sensing end when it is immersed in high-temperature liquid are not exerted on the non-sensing end.