3. Networking# 3.1. Overview 3.1.1. Network Protocols 3.1.2. The TCP/IP Layer Model 3.1.3. Glossary 3.2. Internet Layer 3.2.1. Data Packets 3.2.2. Internet Protocol (IP) 3.2.3. Glossary 3.3. Transport Layer 3.3.1. Transmission Control Protocol (TCP) 3.3.2. TCP Ports 3.3.3. Glossary 3.4. Application Layer 3.4.1. Application Layer and Protocols 3.4.2. FTP (File Transfer Protocol) 3.4.3. Email (SMTP, POP, IMAP) 3.4.4. HTTP (HyperText Transfer Protocol) 3.4.5. DNS (Domain Name System) 3.4.6. Glossary