When troubleshooting a network problem, browsing through the log of a switch, it is discovered that multiple
frames contain errors. In which of the following layers does the problem reside? (Select TWO).

A network engineer is dispatched to an employee office to troubleshoot an issue with the employee’s laptop.
The employee is unable to connect to local and remote resources. The network engineer flips the laptop’s
wireless switch on to resolve the issue. At which of the following layers of the OSI model was the issue
resolved?

When a client calls and describes a problem with a computer not being able to reach the Internet, in which of
the following places of the OSI model would a technician begin troubleshooting?

Which of the following WAN technologies is associated with high latency?

After repairing a computer infected with malware, a technician determines that the web browser fails to go to
the proper address for some sites. Which of the following should be checked?

Which of the following helps prevent routing loops?

A network technician is troubleshooting a problem at a remote site. It has been determined that the connection
from router A to router B is down. The technician at the remote site re-terminates the CAT5 cable that connects
the two routers as a straight through cable. The cable is then tested and is plugged into the correct interface.
Which of the following would be the result of this action?

Two weeks after installation, a network technician is now unable to log onto any of the newly installed company
switches. The technician suspects that a malicious user may have changed the switches’ settings before they
were installed in secure areas. Which of the following is the MOST likely way in which the malicious user gained
access to the switches?

A network administrator recently installed a web proxy server at a customer’s site. The following week, a
system administrator replaced the DNS server overnight. The next day, customers began having issues
accessing public websites. Which of the following will resolve the issue?

A PC technician has installed a new network printer that was preconfigured with the correct static IP address,
subnet mask, and default gateway. The printer was installed with a new cable and appears to have link activity,
but the printer will not respond to any network communication attempts. Which of the following is MOST likely
the cause of the problem?