考纲要求
14.1 Protocols
| 编号 | 要求 |
|---|---|
| 14.1.1 | Describe the purpose of TCP/IP (Transmission Control Protocol / Internet Protocol) |
| 14.1.2 | Describe the four layers of TCP/IP: Application, Transport, Internet, Link |
| 14.1.3 | Describe the purpose of HTTP / HTTPS (web page transfer) |
| 14.1.4 | Describe the purpose of FTP (file transfer) |
| 14.1.5 | Describe the purpose of SMTP (send email) |
| 14.1.6 | Describe the purpose of POP3 / IMAP (retrieve email) |
| 14.1.7 | Describe the purpose of BitTorrent (peer-to-peer file sharing) |
14.2 Circuit Switching, Packet Switching, Routers
| 编号 | 要求 |
|---|---|
| 14.2.1 | Describe circuit switching (dedicated path, telephone network) |
| 14.2.2 | Describe packet switching (data split into packets, independent routing) |
| 14.2.3 | Compare advantages and disadvantages of circuit and packet switching |
| 14.2.4 | Describe the function of a router (reads IP address, routing table, forwards) |