To secure a network, I would start by implementing strong firewalls and intrusion detection systems. Regularly updating software and firmware is crucial to patch vulnerabilities. I would enforce strong password policies and use multi-factor authentication. Network segmentation helps limit access to sensitive areas. Regular audits and monitoring ensure compliance and detect anomalies. Educating users on security best practices is also essential to prevent phishing and social engineering attacks.

When a network outage occurs, I first identify the scope and impact. I check physical connections, routers, and switches for issues. Using diagnostic tools, I pinpoint the problem, whether it's hardware failure, configuration errors, or external attacks. I prioritize restoring critical services and communicate updates to stakeholders. Post-resolution, I analyze the root cause and implement measures to prevent recurrence, such as redundancy or improved monitoring.

TCP (Transmission Control Protocol) is connection-oriented, ensuring reliable data delivery through error checking and retransmission. It's ideal for applications like web browsing or email. UDP (User Datagram Protocol) is connectionless, offering faster transmission with minimal overhead but no guarantee of delivery. It's suited for real-time applications like video streaming or gaming, where speed is prioritized over reliability.

I use centralized management tools like WSUS or SCCM for Windows environments or Ansible for cross-platform systems. These tools automate patch deployment, ensuring consistency and reducing manual effort. I schedule updates during off-peak hours to minimize disruption and test patches in a staging environment before deployment. Regular audits ensure compliance and address any missed updates or failures.

I use monitoring tools like Nagios, PRTG, or SolarWinds to track network performance metrics such as bandwidth usage, latency, and packet loss. Alerts are configured for anomalies, enabling quick response. Regular reports help identify trends and plan capacity upgrades. I also conduct periodic reviews of network configurations and optimize them to ensure efficient performance and scalability.