| 21.Network | ||
| 21.1.Client( 4 ) | 21.14.UDP Server( 3 ) | |
| 21.2.socket( 8 ) | 21.15.urllib( 2 ) | |
| 21.3.Server( 10 ) | 21.16.urlopen( 2 ) | |
| 21.4.ServerSocket( 3 ) | 21.17.urlparse( 1 ) | |
| 21.5.Broadcast( 2 ) | 21.18.GET POST( 3 ) | |
| 21.6.Error Handling( 3 ) | 21.19.HTTP Request( 6 ) | |
| 21.7.inetd( 4 ) | 21.20.BaseHTTPServer( 1 ) | |
| 21.8.IP Address( 5 ) | 21.21.Parse HTML( 9 ) | |
| 21.9.IPv6( 1 ) | 21.22.Web Server( 8 ) | |
| 21.10.NNTP( 1 ) | 21.23.XML RPC( 9 ) | |
| 21.11.SMTP( 10 ) | 21.24.ftp( 12 ) | |
| 21.12.telnet( 1 ) | 21.25.email( 6 ) | |
| 21.13.UDP Client( 5 ) | 21.26.Gopher( 3 ) | |