Transmission Control Protocol / internet protocol (TCP/IP) is a family of network protocols and is also referred to as the internet protocol family due to its great importance to the internet. The computer participating in the network is identified by an IP-address. A computer or generally a device with an IP-address is designed as a host in TCP/IP-jargon. Originally, TCP was developed as a monolithic network protocol; however, it was later separated into the protocols IP and TCP. The core group of the protocol family is supplemented by the User Datagram Protocol (UDP) as an additional transport protocol. Additionally, there are numerous auxiliary and application protocols, such as DHCP and ARP.