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.
Definition 2: Trivial Solution of a Homogeneous System of Linear Equations. If MX=0 is a homogeneous system of linear equations, then it is clear that 0 is a solution. Since 0 is a solution to all homogeneous systems of linear equations, this solution is known as the trivial solution.A nontrivial solution of a homogeneous system of linear equations is any solution to MX=0 where X â  0.f MX=0 is a homogeneous system of linear equations, then it is clear that 0 is a solution. Since 0 is a solution to all homogeneous systems of linear equations, this solution is known as the trivial solution.