Thursday, June 27, 2024
Sunday, September 11, 2022
Friday, February 2, 2024
Tuesday, April 16, 2024
问题:光纤的损耗对应1310nm波长为0.20dB/km左右,1550nm波长为0.33dB/km左右。
Tuesday, September 24, 2024
Wednesday, July 31, 2024
Friday, May 12, 2023
Friday, January 12, 2024
Sunday, June 23, 2024
问题:多路信号时分复用的特点是()A、时域相同,频域分割B、频域相同,时域分割C、同频同相
Monday, September 11, 2023
问题:传送一套节目有三种基本码流:()、()和(),需要把它们组合到一起,叫做复用,复用的方法是时分复用。
Friday, February 2, 2024
Saturday, April 20, 2024
问题:为什么设计有线电视系统时不需考虑信号交流声比这一指标?
Sunday, September 11, 2022
问题:有线电视网络运行维护的包括四大职能:即()、管理、()和提供。A、可靠B、安全C、运行D、维护E、 经济
Wednesday, July 31, 2024
问题:IP地址长度在IPv4中为()位比特,而在IPv6中则为()位比特。
Wednesday, April 5, 2023
Saturday, September 21, 2024
Wednesday, July 31, 2024
Sunday, June 23, 2024
Wednesday, July 31, 2024
Tuesday, January 16, 2024