Overview

Introduction

The Troubleshoot Network Connectivity Issues module provides you with the instruction and Server hardware to develop your hands-on skills.

Learning Outcomes

In this module, you will complete the following exercises:

  • Exercise 1. Using the ipconfig Command
  • Exercise 2. Using the tracert Command
  • Exercise 3. Using the netstat Command
  • Exercise 4. Using the nslookup Command
  • Exercise 5. Using the pathping Command
  • Exercise 6. Using the arp Command
  • Exercise 7. Using the ping Command
  • Exercise 8. Using the nbtstat Command

After completing this lab, you will be able to:

  • Use the ipconfig tool
  • Modify network settings
  • Run tracert
  • Use graphical tracert
  • Run netstat
  • Verify zone transfers using nslookup
  • Enable zone transfer
  • View resource records using nslookup
  • Run nslookup in non-interactive mode
  • Test host reachability using pathping
  • View and update the arp cache
  • Use command line ping
  • Create a reverse lookup zone
  • Retry ping reverse lookup
  • Download, install, and use graphical ping
  • View the NetBIOS cache
  • Disable NetBIOS over TCP/IP

Exam Objectives

The following exam objective is covered in this lab:

  • 1.6 Explain the troubleshooting methodology.

Lab Duration

It will take approximately 1 hour to complete this lab.

Exercise 1 - Using the ipconfig Command

Ipconfig (internet protocol configuration) is a tool used to display all existing TCP/IP network configuration values. The tool is also used to change settings of the Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS). In the ipconfig tool, the command switch/all provides more detailed information than ipconfig.

The parameter /release releases the IP address from the DHCP server for the specified adapter. The parameter /renew renews the IP address on the DHCP server for the specified adapter.

In this exercise, you will use the ipconfig tool to view the IP configuration of a device.

Learning Outcomes

After completing this exercise, you will be able to:

  • Use the ipconfig tool
  • Modify network settings

Exercise 2 - Using the tracert Command

Tracert (trace route command) is a TCP/IP tool that you can use to display the path that an Internet Protocol (IP) packet takes to reach the destination node.

This tool can be used locally to find out the path from your local host to another device on your corporate network or to the Internet. In addition, there are web-based third-party tools that can show the network route from a local device to a distant server that runs a service, such as the World Wide Web (WWW) service.

In this exercise, you will run the tracert command to trace the routes from your device to another computer on the same or remote network.

Learning Outcomes

After completing this exercise, you will be able to:

  • Run tracert
  • Use graphical tracert

Exercise 3 - Using the netstat Command

Network statistics (netstat) is a command-line tool used to view network connections, network protocol statistics, and routing tables. It can also be used to view network interface, including network interface controller and software-defined network interface. The netstat tool can also be used to measure the performance of a network by displaying data such as network errors and network traffic.

In this exercise, you will use netstat to display various statistics of the home network.

Learning Outcomes

After completing this exercise, you will be able to:

-Run netstat

Exercise 4 - Using the nslookup Command

Name server lookup (nslookup) is a built-in tool in Windows that is used to query Domain Name System (DNS) server and view the resource records such as hostnames and IP addresses of devices registered in a domain.

In this exercise, you will run the nslookup tool in the interactive and non-interactive modes.

Learning Outcomes

After completing this exercise, you will be able to:

  • Verify zone transfers using nslookup
  • Enable zone transfer
  • View resource records using nslookup
  • Run nslookup in non-interactive mode

Exercise 5 - Using the pathping Command

Pathping is a Windows-based TCP/IP diagnostic tool that provides information about the network path, network delays and dropped packets from the source to the destination network. This tool combines the functionality of tracert and ping commands to verify connectivity between devices.

In this exercise, you will use the pathping tool to find the route and other network information up to a destination server, either on the same network or on a remote network.

Learning Outcomes

After completing this exercise, you will be able to:

  • Test host reachability using pathping

Exercise 6 - Using the arp Command

Address resolution protocol (ARP) is a TCP/IP protocol that maps a computer’s IP address to its Ethernet or Media access control (MAC) address.

When hostA needs to send information to hostB, hostA will use Domain Name System (DNS) to find hostB. Alternately, hostA will look up its ARP cache and find out the hardware address of HostB to allow it to send data directly to the host.

In this exercise, you will use the arp command to view and update the arp cache on a device.

Learning Outcomes

After completing this exercise, you will be able to:

  • View the arp cache
  • Update the arp cache

Exercise 7 - Using the ping Command

Packet Internet Groper (ping) is a TCP/IP utility used for verifying the reachability of a host or network by sending packets that measure the round-trip time from the source to the destination and back. The ping command can be used both in the command line mode as well as the graphical mode.

In either of the modes, ping sends out Internet Control Message Protocol (ICMP) to the target system, and waits for an echo reply from the remote host.

In this exercise, you will use the ping command - both command line and graphical - to determine the reachability of the target server from a source server.

Learning Outcomes

After completing this exercise, you will be able to:

  • Use command line ping
  • Create a reverse lookup zone
  • Retry ping reverse lookup
  • Download and install graphical ping
  • Use graphical ping

Exercise 8 - Using the nbtstat Command

NetBIOS over TCP/IP (nbtstat) is a Windows TCP/IP utility for resolving NetBIOS name resolution issues. On a typical Windows network, NetBIOS over TCP/IP resolves NetBIOS names using a local cache, WINS, broadcast, HOSTS file, and DNS server query.

In this exercise, you will use nbtstat to resolve some common problems on NetBIOS name resolution.

Learning Outcomes

After completing this exercise, you will be able to:

  • View the NetBIOS cache
  • Disable NetBIOS over TCP/IP

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