(1) Network delay: When the network information flow is too large, it may lead to slow response of the equipment and delay data transmission;

(2) Network packet loss: Network packet loss is the phenomenon that data packets are lost in the channel for various reasons during data transmission;

(3) Network throttling: When data transmission reaches the upper limit of network bandwidth, data packets may be intercepted by devices and sent later;

(4) Network retransmission: When the network is unstable, it may cause the sender to judge that the data packet is lost, resulting in partial data packet retransmission.

Extended data:

Tencent Classroom "Teacher Extreme Edition" can help teachers quickly build their own exclusive classroom. Teachers can use their mobile phone numbers to register and log in with one click. After the class starts, the teacher will share the course link or QR code with the students, so that the students can quickly enter the classroom to attend classes.

The extreme edition is rich in teaching functions. There are four teaching modes for teachers to choose from, such as camera, PPT playback, audio and video playback and screen sharing, including sketchpad, sign-in, answer sheet, raise your hand, picture-in-picture and so on 10. It effectively solves the problems of teachers' unfamiliarity with online teaching and complicated course flow.