You should be updated with Security Patches.So your priority should be on firewalls, routers, web servers, switches, and systems that are open to a mass crowd. In the case of network security, areas that are revealed to the public are considered to be critical.
Let’s look at what the typical tests include: Network Security Testing Network testing can assess security defences, meet compliance requirements, and test the security controls of any kind of electronic information. The objectives of testing differ, relying on the overall goal but also the organization’s maturity. The end conclusion is usually network access to protected data or systems while the testing medium can change (wireless, physical access, hardware/IoT, phishing emails, Dropbox placement). Network security testing is a widespread means of testing security restraints across a network to recognize and indicate vulnerabilities and infer dangers.