Final answer:
The Global Command and Control System (GCCS) is the system that provides connectivity between the US and allied forces, critical for enhancing worldwide military readiness and operations. It incorporates C4ISR components and benefits heavily from advancements in information technologies such as the Internet, GPS, and GIS.
Step-by-step explanation:
The system that provides connectivity between the US and allied forces for critical missions and enhances worldwide readiness, mobility, responsiveness, and operations is the Global Command and Control System (GCCS). The GCCS is an integral part of modern military operations, facilitating communication and the exchange of information across different branches of the military as well as with allied nations. It includes various aspects of command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR), which are crucial for making informed decisions and effective execution of military operations.
The importance of systems like GCCS can be understood by examining the impact of new information technologies such as the Internet, Global Positioning System (GPS), and Geographic Information Systems (GIS). These technologies have revolutionized the way information is shared and processed, contributing to a more connected and informed world. They enable real-time data sharing, critical for the success of complicated, time-sensitive military operations and strategic decision-making.