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Windows Network Troubleshooting Utilities for the A+ Certification Exams

Part of the A+ Certification All-In-One For Dummies Cheat Sheet

When problems arise on a Windows network, you can use the following utilities to do your troubleshooting. Having a clear understanding of all of them will help you on the A+ Certification exams.

  • ipconfig: Display basic TCP/IP configuration, such as IP address, subnet mask, and default gateway.

  • ipconfig /all: Display TCP/IP settings, including your Media Access Control (MAC) address, domain name system (DNS) server, and lease information.

  • ipconfig /release: Release your IP address.

  • ipconfig /renew: Renew your IP address.

  • ping <IP address> or ping <host name>: Send four test messages to the IP address or host name you specify; verify whether the other system is up and running.

  • netstat: Display TCP/IP protocol statistics and connection information. Can be used to see who is connected to your system; what ports are open; and if you use an -o switch, what the process ID is of the program that opened the port.

  • nbtstat: Troubleshoot NetBIOS over TCP/IP. For example, you can view a remote NetBIOS name table using nbtstat -a <IP address>.

  • nslookup: Troubleshoot DNS problems. For example, you can get a listing of all the records in DNS using nslookup.

  • arp: Troubleshoot ARP. For example, you can use arp -a to view your Address Resolution Protocol (ARP) cache.

  • Tasklist: View a list of running processes.

  • Taskkill /PID <pid> /F: Terminates a process when you supply the process id.

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