There are over 2500 RFC's. Each RFC is known by a number. For instance, RFC 1180 presents a tutorial on TCP/IP, RFC 1920 lists the current standards RFC's and explains the RFC standards process, and RFC 1941 is a FAQ list on the topic of Internet deployment in educational establishments.
MX record. A mail exchanger record (MX record) is a type of resource record in the Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient's domain, and a preference value used to prioritize mail delivery if multiple mail servers are available.
The Mexican Peso is the currency in Mexico (MX, MEX). The symbol for CAD can be written Can$. The symbol for MXN can be written Mex$. The Canadian Dollar is divided into 100 cents. The Mexican Peso is divided into 100 centavos. The exchange rate for the Canadian Dollar was last updated on February 8, 2018 from The International Monetary Fund. The exchange rate for the Mexican Peso was last updated on February 9, 2018 from The International Monetary Fund.