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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 25B 80C 110D 143

题目
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

相似考题

1.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

2. 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、Multilayer switchB、CSUC、Proxy serverD、IDS

3. A new company has been given one public IP address. The company employs 200 users requiring Internet access from the headquarters. Which of the following can be implemented to provide Internet access for all the employees?（）A、MulticastingB、Proxy serverC、NATD、Subnetting

4.Users are unable to stay connected to the company‘s wireless network. Several times throughoutthe 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 severalpower lines.Which of the following is the MOST likely cause of the network issue?（）A.AshortB.Open pairsC.ESDD.EMI

参考答案和解析
正确答案： B
解析： 暂无解析
更多“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 25B 80C 110D 143”相关问题

  • 第1题：

    An administrator wants to limit access of a wireless network without requiring authorized users to enter a password or network key. Which of the following methods would MOST likely be implemented on the wireless network?（）

    • A、Disable SSID
    • B、WPA
    • C、MAC filtering
    • D、RAS

    正确答案:A

  • 第2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、Ashort
    • B、Open pairs
    • C、ESD
    • D、EMI

    正确答案:D

  • 第3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、 The DHCP server is misconfigured.
    • C、 The DNS server is only resolving internal name spaces.
    • D、 The email server should be configured to resolve names by IP addresses.

    正确答案:A

  • 第4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

    正确答案:C

  • 第5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

    正确答案:B

  • 第6题：

    单选题
    A new company has been given one public IP address. The company employs 200 users requiring Internet access from the headquarters. Which of the following can be implemented to provide Internet access for all the employees?（）
    A

    Multicasting

    B

    Proxy server

    C

    NAT

    D

    Subnetting


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    Several users report that they are unable to print to a new printer recently installed. The technician is unable to ping the printer. Which of the following is the MOST likely cause?（）
    A

    No IP address on the printer

    B

    Paper jam in the paper feed tray

    C

    Improper DNS settings on the printer

    D

    Broken LCD screen on the printer


    正确答案： A
    解析： 暂无解析

  • 第8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

     The DHCP server is misconfigured.

    C

     The DNS server is only resolving internal name spaces.

    D

     The email server should be configured to resolve names by IP addresses.


    正确答案： C
    解析： 暂无解析

  • 第9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.


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following is true about the Internet according to the passage?
    A

    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.


    正确答案： B
    解析：
    录音中最后一句提到“Internet users are more likely than non-users to receive help from network members.”(网络用户比非网络用户更有可能获得来自网络成员的帮助)，由此可知如果你使用网络，你更有可能得到网络成员的帮助，所以选C。
    【录音原文】
    　　As the size of a person’s social network increases, it becomes more difficult for people to contact a large percentage of network members. The percentage of one’s social network contacted declines as network size grows. This pattern holds true for almost all forms of contact analyzed in the Social Ties survey. The one exception is email.
    　　As the size of people’s social network increases, the percentage of one’s social network contacted weekly by email does not decline, but remains about the same at about 20% of their ties. Several qualities of email help explain this finding. Email enables people to maintain more relationships easily because it is convenient as a communication tool and it gives the control in managing communication. The nature of email is such that people could carry on conversations at different times and at their leisure. This makes it possible for a quick note to an associate, whether it is about important news or seeking advice on an important decision. Moreover, it is almost as easy to email a message to many people as it is to email to only one...
    　　Contrary to fears that email would reduce other forms of contact, there is “media multiplexity”: that is, the more contact by email, the more in-person and phone contact. Therefore, Americans are probably more in contact with members of their communities and social networks than before the advent of the Internet. And Internet users are more likely than non-users to receive help from network members.

  • 第11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


    正确答案： A
    解析： 暂无解析

  • 第12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

    FTP

    B

    SMTP

    C

    POP

    D

    SNMP


    正确答案： D
    解析： 暂无解析

  • 第13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.

    正确答案:D

  • 第14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 not
    • B、The new switch is faulty and needs to be replaced and configured correctly
    • C、The firewall needs to be setup to allow traffic to reach the Internet
    • D、The switch needs to be setup to forward data traffic to the Internet

    正确答案:A

  • 第15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.

    正确答案:C

  • 第16题：

    Several users report that they are unable to print to a new printer recently installed. The technician is unable to ping the printer. Which of the following is the MOST likely cause?（）

    • A、No IP address on the printer
    • B、Paper jam in the paper feed tray
    • C、Improper DNS settings on the printer
    • D、Broken LCD screen on the printer

    正确答案:A

  • 第17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 configuration
    • B、Security policy
    • C、Performance and transaction logs
    • D、Physical network diagram

    正确答案:D

  • 第18题：

    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

    Multilayer switch

    B

    CSU

    C

    Proxy server

    D

    IDS


    正确答案： A
    解析： 暂无解析

  • 第19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.


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    An administrator wants to limit access of a wireless network without requiring authorized users to enter a password or network key. Which of the following methods would MOST likely be implemented on the wireless network?（）
    A

    Disable SSID

    B

    WPA

    C

    MAC filtering

    D

    RAS


    正确答案： C
    解析： 暂无解析

  • 第21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

    Ashort

    B

    Open pairs

    C

    ESD

    D

    EMI


    正确答案： A
    解析： 暂无解析

  • 第22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 not

    B

    The new switch is faulty and needs to be replaced and configured correctly

    C

    The firewall needs to be setup to allow traffic to reach the Internet

    D

    The switch needs to be setup to forward data traffic to the Internet


    正确答案： B
    解析： 暂无解析

  • 第23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 configuration

    B

    Security policy

    C

    Performance and transaction logs

    D

    Physical network diagram


    正确答案： C
    解析： 暂无解析

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