ENSA - Module 12 - Network Troublshooting

A networked PC is having trouble accessing the Internet, but can print to a local printer and ping other computers in the area. Other computers on the same network are not having any issues. What is the problem?

• The default gateway router does not have a default route
• The PC has a missing or incorrect default gateway
• The switch port to which the PC connects has an incorrect VLAN configured
• The link between the switch to which the PC connects and the default gateway router is down
• Default gateway has not been configured on the switch

Which OSI layer are you troubleshooting when investigating an extended ACL related problem?

• Network
• Application
• Transport
• Physical
• Data link

Which of the following should be the first step in the troubleshooting process?

• Implementing preventative measures
• Establishing a theory of probable cause of the problem
• Identifying the problem
• Establishing a plan of action to resolve the problem
• Verifying full system functionality

An engineer is troubleshooting a problem and decides to start from the middle layer of the OSI model. What troubleshooting method is being used?

• Substitution
• Comparison
• Middle-Down
• Follow-the-Path
• Divide-and Conquer

When should a network performance baseline be measured?

• Immediately after the main network devices restarted
• After normal work hours to reduce possible interruptions
• When a DOS attack to the network is detected and blocked
• During normal work hours of an organization

A network administrator issues the telnet www.cisco.com 25 command on the workstation. What is the purpose of this command?

• To prope the server that provides the web service to determine if it is also running an email service
• To verify that the website is operational
• To establish a management session to the web server
• To identify the path of network traffic toward the web server
• To convert name of web sever to an IP address

After gathering symptoms, if the troubleshooter determines that the problem is located outside the control of the organization, what is the next step?

• Gather symptoms from suspected devices
• Contact the administrator of the external system
• Analyze existing symptoms
• Question the end users
• Check the default gateway

What is a common interoperability area with NAT?

• Data link layer
• Application layer
• DHCP
• FTP
• SNMP

What is the recommended minimum period to determine a baseline?

• 24hrs
• 2 days
• 1 month
• 5 days
• 1 week

What is the first step in the 7 step troubleshooting process?

• Document findings
• Test the theory
• Establish probable cause
• Identify the problem
• Keep it simple