CompTIA认证考试

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

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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相似问题和答案

第1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


参考答案：C

第2题：

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.Ashort

B.Open pairs

C.ESD

D.EMI


参考答案：D

第3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


参考答案：B

第4题：

Which of the following is the default HTTPS port?（）

  • A、25
  • B、80
  • C、110
  • D、443

正确答案:D

第5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

第6题：

An administrator wants to limit access of a wireless network without requiring authorized users toenter 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


参考答案：A

第7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:C

第8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


参考答案：A

第9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10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

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