What do you understand by the terms security, network security and information security? How network security and information security are connected?

Security can be defined as:

Security  is  a  protective  measure  which  results  a  condition  to  ensure  the  state  of  data integrity which is maintained against unauthorized access. In straight terms, security is a measure or mechanism which ensures safety from the intruders. The intent of using security measure is to make sure that the intruders cannot interfere in any of the confidential matters.  Security can be given to both information as well as network.

Network Security is defined below:

Network security s mostly concerned with protection of networks and their services from an unauthorized access, alteration and destruction of the data. In straight terms, network security protects remote services from intruders which are not authorized to use them. An efficient network security strategy includes identification of all the threats, before selection of tools/devices which tackle them.

Information Security is defined below:

The procedure of preventing the sensitive information from the intruders is simply known as information security. It protects information confidentiality, availability and integrity against unauthorized access. The intent of information security is to make sure that the intruders cannot write, read or modify any content of information.

The network security and information security are mainly related to each other that is network  security  provides  security  to  the  information  which  is  being  traversed  across  the network. Therefore, this also performs the functionality of information security in addition to securing network peripherals.