Once a client is presented with the HSTS policy, it caches the information for the specified max-age period. During that period, the browser refuses to access the web service over unencrypted HTTP, and refuses to grant exceptions to certificate errors (if the site previously presented a valid, trusted certificate).
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term laser originated as an acronym for light amplification by stimulated emission of radiation.
A laser serves as the source of light and light-sensitive diode as receiver unit. Division Multiplexing) technology. Advantage: With the use of WDM, it is possible to transfer nearly 1 Tbps (C-band) via one pair of fiber today.