In network management , managing the rate at which the traffic enters a network is known as Flow Control . This is used to prevent a fast sender overwhelming the slow receiving network.

Hello,

Network management is basically maintaining the health of your network which in return will maintain your business healthy.  It maintains the flow of the data through networks which has to be proper and no clustering.

Their components are administration, maintenance, operation, provisioning, security.

This helps IT productivity, network security, get overall view of network performance.