TCP - IP Activity Connection Definitions

Physical Connection - the first and lowest layer in the seven-layer OSI Model of computer networking. The Physical Layer consists of the basic hardware transmission technologies of a network. It is a fundamental layer underlying the logical data structures of the higher level functions in a network.

Physical Address - real address, or binary address, is the memory address that is electronically (in the form of binary number) presented on the computer address bus circuitry in order to enable the data bus to access a particular storage cell of main memory.

Network (IP) Address - An Internet Protocol (IP) address is a numerical label that is assigned to devices participating in a computer network that uses the Internet Protocol for communication between its nodes. An IP address serves two principal functions: host or network interface identification and location addressing.

Default Gateway - A Default Gateway is the node on the computer network that is chosen when the IP Address does not match any other routes in the Routing Table.

DNS Server - the translation (resolution) of humanly memorable domain names and hostnames into the corresponding numeric Internet Protocol (IP) addresses, the second principle Internet name space, used to identify and locate computer systems and resources on the Internet.