Troubleshooting the Network Flashcards
A few computers on the engineering segment are having problems reaching the AutoCAD design segment on the network, but they can access all other segments. What is your initial diagnosis of the problem?
It’s a default gateway issue.
It’s a routing issue.
The computers are having cable problems.
It’s a routing issue.
It’s a routing issue. If you have a very good understanding of routers and routing, and one segment of your network cannot communicate with another segment, you will immediately know that there is a problem with routing—possibly a router is malfunctioning
All users on the network are able to connect to a server called server1.dcatt.ca except Bob’s computer. The network is made up of one segment with all workstations and server1.dcatt.ca residing on the same network segment. When troubleshooting at Bob’s computer you ping server1.dcatt.ca, but it resolves the name to an incorrect address. What would cause this problem?
It’s a default gateway issue.
It is a DNS server issue.
It is a hosts file issue.
It is a hosts file issue.
Because all other systems are able to resolve the address correctly, it is most likely not a DNS problem. The problem could be occurring on one system because of an incorrect entry in the hosts file
You think you are having problems with the UNIX server in another region. Two users have already complained this morning. What would be the next logical step in your troubleshooting methodology?
Check the router.
Use netstat on your system.
Ping the UNIX server by IP address.
Ping the UNIX server by IP address.
Ping the UNIX server by IP address. You can test the routing problem by trying to communicate with another computer on the corporate headquarters network. For example, you can ping another computer on this network or use a program that connects to a computer on this network
You have a workstation that you moved from one cubicle to another. Nothing on the workstation was changed, but the computer refuses to connect to the network at the new cubicle but seems to work fine still at the old cubicle. Which of the following is a likely cause?
The network drop has not been activated in the wiring closet.
The cable was damaged in the move.
The TCP/IP configuration is incorrect.
The network drop has not been activated in the wiring closet.
Chances are that the network drop was not activated at the new cubicle. For security reasons, the unused ports on the network may be disabled and need to be enabled when used
You are troubleshooting a networking issue on Sue’s computer. When using the troubleshooting methodology, what is the second phase?
Test the theory of probable cause.
Document findings, actions, and outcomes.
Establish a theory of probable cause.
Establish a theory of probable cause.
The second phase of the troubleshooting methodology, after identifying the problem, is to establish a theory of probable cause
Identify the problem.
Establish a theory of probable cause.
Test the theory to determine the cause.
Establish a plan of action to resolve the problem and identify potential effects.
Implement the solution or escalate as necessary.
Verify full system functionality and, if applicable, implement preventive measures.
Document findings, actions, and outcomes.
Steve, a user on your network, just got back from a two-week vacation. He calls you first thing Monday morning. Which of the following are most likely the reason for Steve’s call? (Choose all that apply.)
He forgot his password.
His account has been disabled.
His password has expired.
A coworker changed Steve’s password while he was on vacation.
He forgot his password.
His account has been disabled.
His password has expired.
He forgot his password, his account has been disabled, or his password has expired. You need to intervene to correct the situation.
You came to work on Monday morning only to notice that you are having network problems. Your domain controller, which also functions as a database server, appears to no longer communicate with clients on the network. How can you further investigate the situation?
Check the error log.
Ping the server to see if it responds.
Run diagnostics on the server.
Check the error log.
Check the error log. When you notice a system is no longer functioning and you are not sure why, check the error logs first to see if something critical failed such as a dependent service or maybe a drive failed to load. Error logs usually don’t contain enough information to solve a problem, and documentation must be consulted to diagnose and resolve it. However, checking the error logs is important because you can determine when the problem occurred, what might have caused the problem, and what other processes are affected by this problem
You have added a new hard drive to a server and moved the swap file to that drive. You have logged the system configuration changes to the change management log as requested by your manager. How can you tell if the changes have made a difference?
Watch the server closely for a few hours, especially during peak usage.
Run Network Monitor to perform an assessment of the current system activity and compare that with your previous baseline, taken before the configuration change took place.
Run Performance Monitor to perform an assessment of the current system activity and compare that with your previous baseline, taken before the configuration change took place.
Run Performance Monitor to perform an assessment of the current system activity and compare that with your previous baseline, taken before the configuration change took place.
Run Performance Monitor to perform an assessment of the current system activity and compare that with your previous baseline, taken before the configuration change took place. Performance Monitor can be used for a variety of purposes, including the following: identifying bottlenecks in CPU, memory, disk I/O, or network I/O; identifying trends over time; monitoring real-time system performance; monitoring system performance history; determining the capacity the system can handle; and monitoring system configuration changes
Which of the following is the most reliable indicator that a network server could be overloaded?
The activity light on the network card is constantly lit.
Performance Monitor shows network requests are backing up in the queue.
Network Monitor shows too many packets are leaving this server.
Performance Monitor shows network requests are backing up in the queue.
Performance Monitor shows network requests are backing up in the queue. Performance and network monitoring can determine whether the server is overloaded or broadcasting unnecessarily. An overloaded server can increase the length of time needed to fulfill network requests
Which of the following is not a good recommendation when it comes to performing a baseline of your network?
Monitor traffic at different times of the day.
Configure the snapshots to take place at midnight each night.
Monitor traffic for days, even weeks.
Configure the snapshots to take place at midnight each night.
Configure the snapshots to take place at midnight each night. Taking snapshots of activity from various periods of the day, week, and month gives you the most accurate assessment of your network. The longer you spend baselining your network, the more accurate the results. If you are taking network activity snapshots only at midnight, you are not getting an accurate assessment of the normal network activity that occurs throughout the day
You can’t seem to surf the Internet or connect to the servers in a remote office location, but you can communicate with systems on your local LAN. What would you do to verify what the problem is?
Run ipconfig.
Ping the router.
Ping a local server.
Ping the router.
When you can communicate with systems on the local network but not remote networks or the Internet, the problem is typically related to the router. As a result, you should ping the router to see if it is up and running
During any network troubleshooting call, which should you check first?
The printer
IP address
Cabling and connections
Cabling and connections
A number of network issues arise because of faulty cables or cables being accidentally disconnected. Always check the simple stuff like connections first!
How can you eliminate complicated cable problems in your troubleshooting process?
Visually inspect the cables.
Use a “fox and hound” to find cables in a tangled mess.
Examine cables with a TDR to find any problems.
Examine cables with a TDR to find any problems.
Eliminate complicated cable problems by examining cables with a TDR to find any problems
What is the best tool to determine where a break has occurred in a cable?
A tone generator
A spectrum division analyzer
A time domain reflectometer
A time domain reflectometer
Use a TDR or an oscilloscope to find the exact spot where the cable is broken. If you don’t have access to such a tool, you might be able to replace the cable without determining the exact area of breakage
