Overview/Description
Troubleshooting network connectivity is a complex responsibility that can require various approaches and techniques in order to resolve issues. In this course, you’ll learn about using the appropriate network troubleshooting software tools and commands. You’ll explore software tools such as Wi-Fi analyzers and port scanners and learn about traditional command line tools and network platform commands. You'll also examine how to troubleshoot common wireless connectivity issues including issues relating to specifications and limitations. Next, you’ll learn about common considerations and issues pertaining to wireless connectivity. You’ll explore general network troubleshooting best practices as they relate to wired networks. Finally, you'll examine considerations such as routing tables, VLAN assignment, and other common issues. This course is one of a collection of courses that prepares learners for the N10-008: CompTIA Network+ certification exam.
recognize how to work with a packet sniffer to intercept and log network traffic
describe how to use a port scanner to identify which ports are open on a network
describe how to use a Wi-Fi analyzer to detect usage
recognize when and how to use a bandwidth speed tester
describe how to use other common software tools such as iPerf, NetFlow analyzers, Trivial File Transfer Protocol (TFTP) server, terminal emulator, and IP scanner
describe how to use network troubleshooting command line tools, including ping, ipconfig, telnet, Nmap, and netstat
outline the features and purpose of using Linux command line tools
recognize how to troubleshoot wireless connectivity issues such as throughput, speed, distance, received signal strength indication (RSSI) signal strength, effective isotropic radiated power (EIRP), and power settings
describe wireless connectivity considerations such as antennas, channel utilization, site surveys, and AP association time
recognize common wireless connectivity issues including interference, channel overlap, antenna cable attenuation/signal loss, RF attenuation/signal loss, wrong SSID, incorrect passphrase, encryption protocol mismatch, insufficient wireless coverage, and captive portal issues
describe the key considerations when troubleshooting wired networking issues, including device configuration review, routing tables, interface status, VLAN assignment, and network performance baselines
describe how to troubleshoot issues relating to an incorrect or failed default gateway
describe how to troubleshoot issues relating to an incorrectly configured netmask
recognize how to troubleshoot issues caused by duplicate IP and MAC addresses
recognize how to troubleshoot issues where names are not resolving
describe how to troubleshoot issues caused by expired DHCP scopes and rogue DHCP servers
recognize how to correct issues caused by expired IP addresses and incorrect system times
describe how to troubleshoot issues caused by untrusted SSL certificates and blocked TCP/UDP ports
recognize how to troubleshoot issues caused by incorrect firewall and ACL settings
describe how to correct issues caused by hardware failures and unresponsive services
outline the characteristics of and reason for common wired connectivity issues