Learning--the performance index cognition of packet switching network

The internet has the ability to provide transmission service for distributed applications on the end system, which is related to the ability of packet switching network to transmit packets between many end systems, which is associated with network performance.

This lesson mainly studied 1,. Time delay 2, packet loss rate 3, bandwidth and swallow volume. 4 Hops and paths.

Delay: is an important performance index of the computer network, one-way delay is set for the network one end of the time required for transmission to another, round-trip delay refers to a packet from one end of the network path to the other end and return the required time. The delay is mainly composed of processing time delay, transmission delay and retransmission delay.

Packet drop rate, also known as packet loss, refers to the ratio of total packets lost in packets during a certain time period of two nodes.

Bandwidth and throughput. Network bandwidth refers to the value of the bit-sphere transmitted by the link over a certain period of time, and the throughput is the ability to transmit data without error in a unit-period.

Learning--the performance index cognition of packet switching network