| 801 | 828 | Assign_New_Administrator.mp4 | /uploads/video/1439221983690426 | video/mp4 | 3 | |
| 802 | 829 | 7 整数和小数的取余和计算方法.mp4 | /uploads/video/1439222036837685 | video/mp4 | 3 | |
| 803 | 830 | banner.png | /uploads/image/png/18b4dee4f08659b2cd3633fe40e2c0e9.png | image/png | 2 | |
| 804 | 831 | 11 数组.mp4 | /uploads/video/1439224172805141 | video/mp4 | 3 | |
| 805 | 832 | 61a21e1a7cc1355177c35dd46fa0ab1a.png | /uploads/image/png/971641205cbdd6f49597bfbb9e8aa353.png | image/png | 2 | |
| 806 | 833 | 61a21e1a7cc1355177c35dd46fa0ab1a.png | /uploads/image/png/aa90a752034d39d1379b55dc522f0879.png | image/png | 2 | |
| 807 | 834 | 1第一章：课程介绍.mp4 | /uploads/video/1439228585662418 | video/mp4 | 3 | |
| 808 | 835 | 2第二章：企业网络架构介绍.mp4 | /uploads/video/1439228890603237 | video/mp4 | 3 | |
| 809 | 836 | 3第三章：传输介质简介.mp4 | /uploads/video/1439229212197851 | video/mp4 | 3 | |
| 810 | 837 | 4第四章：冲突域介绍.mp4 | /uploads/video/1439229437897421 | video/mp4 | 3 | |
| 811 | 838 | 5第五章：双工模式.mp4 | /uploads/video/1439229583849660 | video/mp4 | 3 | |
| 812 | 839 | 6第六章：理解分层模型作用.mp4 | /uploads/video/1439229709074959 | video/mp4 | 3 | |
| 813 | 840 | 7第七章：数据封装.mp4 | /uploads/video/1439229865194480 | video/mp4 | 3 | |
| 814 | 841 | 8第八章：帧格式.mp4 | /uploads/video/143923002919750 | video/mp4 | 3 | |
| 815 | 842 | 9第九章：数据帧传输（MAC地址）.mp4 | /uploads/video/1439230187849722 | video/mp4 | 3 | |
| 816 | 845 | 12第十二章：VLSM CIDR Gateway.mp4 | /uploads/video/1439231494618740 | video/mp4 | 3 | |
| 817 | 846 | 11第十一章：IP编址 二进制 十进制 子网掩码.mp4 | /uploads/video/143923176387713 | video/mp4 | 3 | |
| 818 | 848 | 61a21e1a7cc1355177c35dd46fa0ab1a.png | /uploads/image/png/3b5c9caba58dd68fc844f0bdb3a1d859.png | image/png | 2 | |
| 819 | 849 | 11第十一章：IP编址 二进制 十进制 子网掩码.mp4 | /uploads/video/1439233037795953 | video/mp4 | 3 | |
| 820 | 850 | 201401031133514731.jpg | /uploads/image/jpeg/eb1e75cb1036a41ce5dc043bf5b55f70.jpg | image/jpeg | 2 | |