Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The first even mode is fully transmitted when it comes from the left port (a) and converted to the odd mode. Same input is reflected back when coming from the right port (b).
