Transmission Control Protocol (TCP)

TCP is responsible for sending emails across the Internet. IP is responsible for preventing spam emails.

TCP is responsible for giving addresses to each computer on the Internet. IP is responsible for mapping domain names to those addresses.

TCP is responsible for the security of Internet connections. IP is responsible for checking that packets are sent on time.

TCP is responsible for reliable transmission of packets. IP is responsible for routing of packets from source to destination across the Internet.