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Network administrators employ several security mechanisms to protect data in the network from unauthorized access and various threats. The security mechanisms enhance the usability and integrity of the network. The design aspects of the network security mechanism involve both hardware and software technologies. The application domains of security mechanisms cover both public and private computer networks which are used in everyday jobs for conducting transactions and communications among business partners, government agencies, enterprises and individuals. The network security schemes vary depending on the types of the network, that is, public or private, wired or wireless. Data security includes encryption, tokenization, and key management practices in protecting data across all applications and platforms. The antivirus and antimalware software are also part of network security for protection from …