ICS-SCADA Exam Dumps : ICS/SCADA Cyber Security Exam

The Modbus protocol was developed by Modicon, now a brand of Schneider Electric.

It was originally designed in 1979 for use with its programmable logic controllers (PLCs) in industrial applications.

Modbus is a serial communications protocol that has become a de facto standard communication protocol and is now commonly used to connect industrial electronic devices. The main reasons for its use are its simplicity and the fact that it is open-source, which allows manufacturers to build their own implementations of the standard.

References

"Modbus Protocol Reference Guide," Modicon, Inc., 1979.

"A Guide to the Modbus Protocol," Schneider Electric.

The protocol number 6 represents TCP (Transmission Control Protocol) in the Internet Protocol suite. TCP is a core protocol of the Internet Protocol suite and operates at thetransport layer, providing reliable, ordered, and error-checked delivery of a stream of bytes between applications running on hosts communicating via an IP network.References:

RFC 793, "Transmission Control Protocol," which specifies the detailed operation of TCP.

One weakness of a vulnerability scanner is that it is not designed to go through filters or bypass security controls like firewalls or intrusion detection systems. Vulnerability scanners typically perform well in identifying known weaknesses within the perimeter of a network or system but might not effectively assess systems that are shielded by robust security measures, which can filter out the scanner's attempts to probe or attack.References:

National Institute of Standards and Technology (NIST), "Technical Guide to Information Security Testing and Assessment".