Weakness in technology

Network technologies naturally have weaknesses that can be exploited by an attacker. Some of them are as follows:

• TCP/IP protocol: Protocols, such as HTTP and FTP, are generally not secure because they are not encrypted. Protocols, such as SMTP and SNMP, are insecure because SNMP queries are allowed to flow through a firewall and security systems as the scanners in the remote can acquire the filter rules.
• Operating system: Most operating systems have several known security problems.
• Network equipment: Weakness in password protection, authentication, and holes in firewalls are some examples of vulnerabilities in network devices.