| A | B |
| Internet Protocol (IP) | Divides files into packets and routes them through the Internet to their destination |
| Transmission Control Protocol (TCP) | Verifies that each packet has been transmitted and received correctly and retransmits packets that become lost or corrupted |
| User Datagram Protocol (UDP) | Transmits packets in a continuous stream but doesn't verify whether packets are received correctly |
| Domain Name System (DNS) | Matches unique IP addresses with easy-to-read URLs |
| Hypertext Transfer Protocol (HTTP) | Transfers hypertext pages on the World Wide Web |
| HTTP + Secure Sockets Layer (HTTPS) | Encrypts and transfers hypertext pages on the World Wide Web |
| Dynamic Host Configuration Protocol (DHCP) | A network management protocol that assigns IP addresses on a network |
| Simple Mail Transfer Protocol (SMTP) | A protocol used to send email |
| Post Office Protocol 3 (POP3) | A protocol used to receive email. Email is deleted from a server after it is downloaded to a client. |
| Internet Message Access Protocol (IMAP) | A protocol used to receive email. Email is saved on a server even after it is downloaded to a client |