Hey Kapoor, a Security Administrator has following responsibilities on a day-to-day basis:
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Configure security systems such as firewalls, antivirus, and IDS/IPS software
 
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Create network policies and authorization roles for file access
 
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Identify threats and work to create steps to defend against them
 
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Define disaster recovery plans
 
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Consult with staff, managers and executives on the best security practices
 
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Perform vulnerability and penetration tests across all network segments
 
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Monitor network traffic for suspicious behavior
 
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Analyze current security requirements and make suggestions for improvements