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单选题
Users are unable to access the Internet but the users are able to send/receive email from theirdesktops. Which of the following ports is MOST likely being blocked?（）
A
25
B
80
C
110
D
143
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单选题An administrator wants to prevent users from plugging in their personal laptops and accessing the Internet without a member of the IT staff configuring the machine first. Which of the following would MOST likely be installed?（）A
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单选题An administrator receives a call from a user who is unable to receive email. After troubleshooting the administrator is able to resolve the issue and verify that user is able to access email again. Which of the following is the NEXT step that the administrator should take？（）A
Implement preventative measures.B
Close the issue.C
Document the outcome.D
Question other users to make sure they are not having the same issue.
考题
单选题An email server has been installed； however， the staff reports that they are unable to receive email from external email addresses， but they can email each other. Which of the following is the MOST likely reason for this？（）A
The company firewall is blocking SMTP ports.B
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考题
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WPAC
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考题
单选题Users can only access external websites. Which of the following is the MOST likely cause of this problem？（）A
The incorrect gateway address is being provided to the workstation.B
DHCP is not providing workstations with the proper subnet mask.C
The DNS cache was cleared.D
The internal zone was deleted.
考题
单选题Users are unable to stay connected to the company's wireless network. Several times throughout the day the users' signals are dropped and they are forced to reconnect to the network. A technician determines the network cabling that supplies the WAP has been run inside with several power lines. Which of the following is the MOST likely cause of the network issue?（）A
AshortB
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Americans were more in contact before the advent of the Internet.B
The Internet is weakening the tie of social networks.C
If you use the internet, you are more likely to get help from network members.D
Internet users are more likely to receive help from non-users.
考题
单选题An administrator replaced a router with a switch. End users are able to access network shares butare not able to access the Internet. Which of the following is the BEST explanation why the usersare unable to access the Internet?（）A
Router routes traffic between different networks and a switch does notB
The new switch is faulty and needs to be replaced and configured correctlyC
The firewall needs to be setup to allow traffic to reach the InternetD
The switch needs to be setup to forward data traffic to the Internet
考题
单选题An administrator receives a call from a user who is unable to receive email. After troubleshooting the administrator is able to resolve the issue and verify that user is able to access email again. Which of the following is the NEXT step that the administrator should take?（）A
Implement preventative measures.B
Close the issue.C
Document the outcome.D
Question other users to make sure they are not having the same issue
考题
单选题Multiple users call from the same location saying that they have no network connectivity. The administrator is unable to ping the main switch at that IDF. Which of the following configuration management documents would the administrator MOST likely consult to troubleshoot the issue?（）A
Baseline configurationB
Security policyC
Performance and transaction logsD
Physical network diagram
考题
单选题A user can receive email but cannot send email with the email client software. Which of the following protocols is incorrectly configured?（）A
FTPB
SMTPC
POPD
SNMP
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