Final Answer:
The internet is a global network of interconnected computers that allows communication and information sharing worldwide. It's an expansive network of networks (internetwork) where the role of an Internet Service Provider (ISP) is crucial. An ISP connects users to the internet, acting as a gateway.
Step-by-step explanation:
The internet is a global network of interconnected computers, fostering communication and information sharing globally. Think of it as an extensive network of networks (internetwork), and ISPs are the gateway to this interconnected world. They connect users to the internet by providing the necessary infrastructure and access. A domain name serves as a readable address to access websites, while a URL (Uniform Resource Locator) specifies the exact location of a resource on the internet, such as a webpage or file. Additionally, a browser is the software that allows users to explore and interact with the internet, interpreting and displaying web content.
The device enabling internal staff to connect to both the ISP and web-based email hosting is a router, often known as a gateway or edge device. Routers work at the packet level, managing the flow of data packets within the internal network and directing them to the appropriate destinations, such as the ISP for internet access and the email hosting provider for sending and receiving emails from customers. This process involves routing tables and protocols like TCP/IP, ensuring efficient and accurate transmission of data across networks.
Routers play a vital role in the packet-switched nature of the internet, using protocols and algorithms to determine the best paths for data packets to reach their intended destinations. They examine packet headers, apply routing algorithms, and make decisions based on destination addresses, ensuring data reaches its target effectively.