At which two layers of the OSI model does a WAN operate? (Choose two.) Physical Layer Data Link Layer Network Layer Transport Layer Presentation Layer Application Layer
Which two statements are true about time-division multiplexing (TDM)? (Choose two.) TDM relies on Layer 3 protocols to operate. Multiple sources can transmit over a single channel. Original data streams must be reconstructed at the destination. TDM
H3C_网络大爬虫第4期-QoS专题
第四期(QoS专题)
QoS（Quality of Service）是服务质量的简称。对于网络业务来说，服务质量包括哪些方面呢？从传统意义上来讲，无非就是传输的带宽、传送的时延、数据的丢包率等，而提高服务质量无非也就是保证传输的带宽，降低传送的时延，降低数据的丢包率以及时延抖动等
