The rapid evolution of the information age has firmly embedded the internet into our everyday lives. While traditional internet frameworks provide essential services, they still grapple with numerous challenges, notably data transmission speed, security, and privacy. In the face of these hurdles, the emergence of quantum technology has heralded the dawn of a new frontier—the quantum internet. This next-generation internet is not just an upgrade; it represents a revolutionary transformation of our network architecture that is capturing attention worldwide.

At its core, the quantum internet builds upon the principles of quantum mechanics, integrating quantum communication and computation to craft an entirely new form of internet infrastructure. This innovative approach overrides the limitations of conventional communications, promising a network experience that is not only faster and more secure but also incredibly intelligent.

So, what exactly is the quantum internet? At a fundamental level, it employs quantum phenomena such as superposition and entanglement to achieve unprecedented data transmission speeds and heightened security. Unlike classical communications, which rely on electromagnetic waves, quantum communication utilizes quantum states to transfer information. This radical difference means that, within the quantum internet, data is immune to easy interception or tampering, achieving a level of security that is nearly foolproof.

Central to the workings of quantum communication are technologies including Quantum Key Distribution (QKD) and entanglement swapping. Through entangled qubits, QKD enables secure key sharing between parties without fear of eavesdropping, ensuring absolute data protection. On the other hand, entanglement swapping facilitates instantaneous information transfer over long distances by leveraging connected entangled particles, markedly enhancing the efficiency and speed of communications.

The construction of a quantum internet is a multifaceted endeavor enveloping various technical innovations, particularly in quantum communication, foundational quantum network infrastructure, and quantum computing. Quantum communication stands as the vanguard of this initiative, exploiting the unique characteristics of qubits—beyond traditional bits—to significantly revolutionize how data is transmitted.

Implementation relies on a robust quantum network infrastructure, including satellites for quantum communication, relay stations, and quantum transmission lines. These components create a framework within which quantum information can be transported globally. Countries like China, the United States, and members of the EU have begun extensive efforts to establish these infrastructures, resulting in notable advancements.

In tandem with quantum communication, quantum computing offers potent processing capabilities that can supercharge data handling and complex computational tasks. The power of quantum computers to conduct multiple calculations simultaneously opens doors to enhanced operational efficiencies. As quantum computing and the quantum internet integrate, we may witness groundbreaking applications such as real-time processing of vast data volumes and instantaneous feedback loops, leading to a more intelligent internet.

Despite the immense potential of the quantum internet, its trajectory is not devoid of challenges. Key hurdles include the stability of qubits and the limitations of transmission distances, which are critical to advancing quantum communications. While significant strides have been made in quantum technology, maintaining the integrity of data over extensive networks remains an unresolved issue. Furthermore, the current developmental phase of quantum computers has yet to meet the demands of large-scale computation, necessitating ongoing research and innovation.

Nonetheless, there is unfaltering optimism regarding the quantum internet’s future. As technological breakthroughs continue, the vision of a quantum internet is steadily materializing, guiding us towards an era characterized by enhanced security, intelligence, and efficiency in our online interactions.

On a practical level, the quantum internet is poised to revolutionize various industries, encompassing finance, healthcare, government, and many others. In finance, the advent of quantum encryption technologies promises unparalleled data security, significantly mitigating risks including fraud and information leaks. With robust quantum infrastructure, banks and financial institutions can offer superior cross-border payment services that fortify customer privacy and protect assets.

Healthcare data security remains a paramount concern. As the quantum internet expands, the secure transmission of medical data will become far more reliable. Quantum communication provides robust encryption, ensuring that patient information remains confidential while facilitating enhanced telemedicine services and efficient analysis of healthcare data.

In government and defense sectors, the application of quantum internet technology is vital. The extraordinary protection afforded by quantum communications ensures that military communications are fortified against interception and alteration. The strategic global framework of quantum networks can enhance inter-state information exchange, safeguarding national security interests while enabling efficient collaboration.

Moreover, the quantum internet could serve as a backbone for the Internet of Things (IoT) and smart city constructs. With a proliferation of connected devices, ensuring secure data transmission and real-time processing risk becomes paramount. Quantum communication promises secure pathways for data transfer, thwarting potential cyberattacks while optimizing the operation of smart cities through improved data management capabilities.

As the pursuit of a quantum internet accelerates, this frontier technology has the potential to emerge as a cornerstone of societal advancement. As various nations invest in quantum technologies, the dream of a contemporary internet—one characterized by efficiency, security, and intelligent interfaces—comes closer to reality. The quantum internet is envisioned to foster unprecedented advancements in security, privacy protection, and application intelligence.

Yet, to realize the widespread utility of the quantum internet, numerous technical and engineering challenges must be overcome. To hasten this evolution, global research entities, businesses, and governments must collaborate in driving forward the progress of quantum technologies. In an era with immense potential, the quantum internet is poised to lay the foundational stone for the future of digital connectivity.

With ongoing advancements in quantum technology, we stand at the brink of substantial growth. In the near futures, we may witness an expansive roll-out of the quantum internet, significantly contributing to global digital transformation and the creation of smart societies. The quantum internet will undoubtedly shape the framework for future networking technologies, ushering us into an age defined by superior security and intelligence in our online infrastructure.