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ccna certification cost in qatar.10.4.1.2 Types of Network TestingAfter a network is put into operation, it is important to determine its security status. There are a variety of tests that can be used to assess the operational status of a system. Penetration testing: Network penetration testing simulates an attack from a malicious source and is designed to determine the viability of an attack and the likely impact after an attack has occurred.Network scanning: Software that includes the ability to ping computers, which scans for listening TCP ports and shows what types of resources are available on the network. Some scanning software can also detect usernames, groups, and shared resources. Network administrators can use this information to harden their networks. Vulnerability Scan: Contains software that can detect potential weaknesses in the Northside system. These weaknesses include misconfigurations, empty or default passwords, and potential targets for DoS attacks. Some software allows administrators to force a system to crash by using known vulnerabilities. Password Cracking: Contains software used to test and detect weak passwords that should be modified. Password policies should contain guidance to prevent weak passwords. Log review: System administrators should review logs to identify potential security threats. By scanning lengthy log files, abnormal behavior should be detected by filtering software. Integrity checks: Integrity check systems detect and report changes in the system. Most monitoring is concerned with the file system. However, some checkingcheckers can also report login and logout behavior. Virus detection: Virus detection software can be used to identify and remove computer viruses and other malware. Note: Other tests, such as war dialing and scanning along the street, are considered too old, but need to be considered in network testing as well. Some testing techniques rely heavily on manual processes, others are highly automated. Regardless of the type of testing, the people who build and implement security testsshould have a strong knowledge of security and networking, including: Network security; Firewalls.Intrusion Prevention System (IPS); Operating systems; Basic programming knowledge; Network protocols (e.g., TCP/IP)0 10.4.1.3 Applying Network Test ResultsNetwork security test results are used for a variety of purposes. To define mitigation behaviors and address identified vulnerabilities. To serve as a benchmark to track an organization's progress in meeting security requirements. To assess the status of implementation of system security requirements. To perform a cost-benefit analysis of system security improvements.310 Chapter io Managing a Secure Network. Enhance other behaviors, such as risk assessment, Certificationand Authorization (C&A), and performance improvement. Serves as a reference point for correcting behaviors.