The process of diagnosing and resolving network issues like slow speeds, connectivity problems, hardware or software failure.
OSI Model: A conceptual model for communication between computers in a network.
TCP/IP Protocol: An internet protocol suite that provides end-to-end connectivity, specifying how data should be packaged and transmitted.
Networking Devices: Router, switch, modem, hub, firewall, etc.
Network Topologies: Physical and logical arrangements of computers, cable, and other network components.
IP Addressing: Unique identifiers assigned to devices on a network.
Subnetting: Dividing a network into smaller networks.
VLANs: Virtual local area networks that allow a network administrator to partition a network logically.
DNS: Domain name system that translates domain names to IP addresses.
DHCP: Dynamic host configuration protocol that assigns IP addresses to devices automatically.
Network Security: Protecting a network from unauthorized access, attacks, and data leakage.
Wireless Networks: Configuring, troubleshooting and securing wireless networks.
Troubleshooting Tools: Command lines, network sniffer, ping, traceroute, etc.
Troubleshooting Techniques: Systematic approaches to diagnose and solve network problems.
Network Monitoring: Observing and analyzing network performance to address potential issues before they become problems.
Cloud-Based Network Solutions: Monitoring and troubleshooting networks that leverage cloud-based infrastructure.
Network Connectivity Tests: This type of network troubleshooting is used when there is a problem with the connection between two or more devices. It involves testing the connection between the devices to identify the source of the problem.
Firewall Configuration: This type of network troubleshooting involves examining the firewall configuration to ensure it is not blocking any critical network traffic.
DNS Troubleshooting: DNS (Domain Name System) troubleshooting involves identifying and solving problems with the DNS system or its configuration. This may include checking DNS server settings or verifying the IP address of the server.
IP Address Configuration Troubleshooting: This type of network troubleshooting involves checking and correcting IP address conflicts and ensuring that devices are properly configured.
Packet Sniffing: Packet sniffing involves capturing and analyzing network traffic to identify problems with the network. This can be done using software or hardware tools.
Performance Troubleshooting: Performance troubleshooting is used to identify problems that are causing slow network performance. This may include analyzing network traffic and identifying bottlenecks.
Wireless Network Troubleshooting: Wireless network troubleshooting is used when dealing with wireless networks. This may include resolving signal interference issues, or checking wireless group policy settings.
Network Security Troubleshooting: Network security troubleshooting involves identifying and resolving security issues within the network. This may include disabling unneeded ports or fixing vulnerabilities in the network.
Remote Access Troubleshooting: Remote access troubleshooting is used to identify and solve problems related to remote access technologies such as VPN or RDP connections.
Switch and Router Configuration Troubleshooting: This type of network troubleshooting involves checking the configurations of switches and routers and correcting issues that may cause connectivity problems.