Network+ - Network Concepts Lab 9 - Network Troubleshooting

Sep 20, 2026

Uploaded by Patrick

Network Concepts Lab 9 focuses on methodical network troubleshooting aligned with CompTIA Network+ objectives. Learners practice summarizing DNS components, applying troubleshooting methodology to scenario-based issues, explaining DHCP purpose and properties, and using appropriate software tools to resolve connectivity problems. The lab content includes an overview of problem-solving steps, key terminology for DNS and DHCP, and a structured progression through CLI-based DNS troubleshooting, DHCP scope configuration, and recovery from deactivated DHCP scope scenarios.

LanguageEnglish

CategoryExam

FormatPDF

Pages25

Reading Time1 h 3 min

AccessFree to download

Troubleshoot a Suspected DNS Issue Using CLI Utilities

Using the Problem-Solving Process Troubleshoot a Suspected DNS Issue

Conclusion

Review Questions

Configure an Operational DHCP Scope of Addresses

Configure a DHCP Server Scope

Conclusion

Review Questions

Observe the Effects of a Deactivated Scope and Resolve the Configuration

Deactivate the DHCP Scope, Observe the Effects and Resolve the Problem

Conclusion

Review Questions

CompTIA Network+® Lab Series Network Concepts Lab 9: Network Troubleshooting Objective 1.7: Summarize DNS concepts and components Objective 1.8: Given a scenario, implement network troubleshooting methodology Objective 2.3: Explain the purpose and properties of DHCP Objective 4.3: Given a scenario, use appropriate software tools to troubleshoot connectivity Document Version: 2014-01-13 Organization: Miami Lakes Educational Center Author: Marlon Vernon, Academy Leader, Information Technology Copyright © National Information Security, Geospatial Technologies Consortium (NISGTC) The development of this document is funded by the Department of Labor (DOL) Trade Adjustment Assistance Community College and Career Training (TAACCCT) Grant No. TC-22525-11-60-A-48; The National Information Security, Geospatial Technologies Consortium (NISGTC) is an entity of Collin College of Texas, Bellevue College of Washington, Bunker Hill Community College of Massachusetts, Del Mar College of Texas, Moraine Valley Community College of Illinois, Rio Salado College of Arizona, and Salt Lake Community College of Utah. This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit [http://creativecommons.org/licenses/by/3.0/](http://creativecommons.org/licenses/by/3.0/ or)[ or](http://creativecommons.org/licenses/by/3.0/ or) send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA. The Center for Systems Security and Information Assurance (CSSIA), in partnership with the Network Development Group (NDG) is given a perpetual worldwide waiver to distribute per US Law this lab and future derivatives of these works. Contents 1 Troubleshoot a Suspected DNS Issue Using CLI Utilities ............................................ 7 1.1 Using the Problem-Solving Process Troubleshoot a Suspected DNS Issue.......... 7 1.2 Conclusion .......................................................................................................... 11 1.3 Review Questions ............................................................................................... 11 2 Configure an Operational DHCP Scope of Addresses ............................................... 12 2.1 Configure a DHCP Server Scope ......................................................................... 12 2.2 Conclusion .......................................................................................................... 23 2.3 Review Questions ............................................................................................... 23 3 Observe the Effects of a Deactivated Scope and Resolve the Configuration........... 24 3.1 Deactivate the DHCP Scope, Observe the Effects and Resolve the Problem .... 24 3.2 Conclusion .......................................................................................................... 25 3.3 Review Questions ............................................................................................... 25 Introduction This lab is part of a series of lab exercises designed to supplement coursework and provide students with a hands-on training experience based on real world applications. ® This series of lab exercises is intended to support courseware for CompTIA Network+ certification. Networks are important to business processes and when they are not fully operational it is costly and frustrating to the users. Network administrators need to understand not just how to keep the network functional, but also how to approach troubleshooting problems when a network is not fully operational. This lab will review troubleshooting and a methodology that will provide ideas on where to start in the problem-solving effort. This methodology will be used as a guide in troubleshooting two protocols widely used in networks and it is important to be able to diagnose issues with them. DNS and DHCP will be the two

FAQs

What problem-solving steps does the lab recommend for network troubleshooting?

The lab uses a logical sequence: identify the problem, gather information, consider possible causes, devise a solution, implement it, test the solution, and document the solution.

What is DNS in this lab, and what role do DNS servers play?

DNS resolves and maps hostnames and domain names to IP addresses. DNS servers contain associated name/IP databases and provide responses to resolvers on request.

What does DHCP do, and what is a DHCP scope?

DHCP automatically assigns network configuration parameters such as IP address, subnet mask, default gateway, DNS server addresses, and lease time. A DHCP scope is the consecutive range of IP addresses the DHCP server can lease to clients.

Sep 20, 2026

Uploaded by Patrick