When configuring a new server, a technician requests that an MX record be created in DNS for the
new server, but the record was not entered properly. Which of the following was MOST likely
installed that required an MX record to function properly?

A company has had several virus infections over the past few months. The infections were caused
by vulnerabilities in the application versions that are being used. Which of the following should an
administrator implement to prevent future outbreaks?

A user calls the help desk and states that he was working on a spreadsheet and was unable to

print it. However, his colleagues are able to print their documents to the same shared printer.
Which of the following should be the FIRST question the helpdesk asks?

A network technician is using a network monitoring system and notices that every device on a
particular segment has lost connectivity. Which of the following should the network technician do
NEXT?

A technician just completed a new external website and setup access rules in the firewall. After
some testing, only users outside the internal network can reach the site. The website responds to
a ping from the internal network and resolves the proper public address. Which of the following
could the technician do to fix this issue while causing internal users to route to the website using
an internal address?

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?

While troubleshooting a connectivity issue, a network technician determines the IP address of a
number of workstations is 169.254.0.0/16 and the workstations cannot access the Internet. Which
of the following should the technician check to resolve the problem?

A technician recently ran a 20-meter section of CAT6 to relocate a control station to a more central
area on the production floor. Since the relocation, the helpdesk has received complaints about
intermittent operation. During the troubleshooting process, the technician noticed that collisions
are only observed on the switch port during production. Given this information, which of the
following is the cause of the problem?

A technician has finished configuring AAA on a new network device. However, the technician is
unable to log into the device with LDAP credentials but is able to do so with a local user account.
Which of the following is the MOST likely reason for the problem?

A technician is tasked with connecting a router to a DWDM. The technician connects the router to
the multiplexer and confirms that there is a good signal level. However, the interface on the router
will not come up. Which of the following is the MOST likely cause?