natural science(noun) the sciences involved in the study of the physical world and its phenomena. natural science(Noun) A science involved in studying phenomena or laws of the physical world; a general term of physics, chemistry, biology, astronomy, and so on. Natural science. The natural sciences are those branches of science that seek to elucidate the rules that govern the natural world through scientific methods.
Local number portability (LNP) lets you change your phone company that provides you with your local calls without changing your telephone number(s).Taking your telephone number to another phone company is known as 'porting'.ocal number portability (LNP) lets you change your phone company that provides you with your local calls without changing your telephone number(s).
Port numbers are mainly used in TCP and UDP based networks, with an available range of 65,535 for assigning port numbers. Although an application can change its port number, some commonly used Internet/network services are allocated with global port numbers such as Port Number 80 for HTTP, 23 for Telnet and 25 for SMTP.