Final answer:
A gateway enables a network to connect to other networks. Maintaining careful records of networked devices and upgrading routers and servers regularly are effective ways to prevent network failure.
Step-by-step explanation:
A gateway is a common network hardware component that enables a network to connect to other networks. It acts as an intermediary between two networks, allowing data to pass through and ensuring smooth communication between them. It is often used in larger-scale networks, such as corporate networks or the internet, to establish connections and route data between different networks.
As for the most common cause of network failure, maintaining careful records of networked devices is crucial. By keeping track of the devices connected to the network, their configurations, and any changes made, administrators can quickly identify and troubleshoot issues that may lead to network failure. It helps in ensuring that network devices are properly configured, up-to-date, and free from any potential conflicts.
Additionally, regular upgrades of routers and servers are essential to prevent network failure. Outdated hardware or software can lead to compatibility issues, performance degradation, and vulnerabilities that may result in network disruptions.