CompTIA认证考试
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 blo
题目
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.
相似问题和答案
第1题：
电子邮件营销根据企业的营销计划，可分为（）。
- A、临时性的Email营销和长期Email营销
- B、内部Email营销和外部Email营销
- C、顾客关系Email营销和顾客服务Email营销
- D、经营型Email营销和非经营型Email营销
正确答案:A
第2题：
按照是否将Email营销资源用于为其他企业提供服务，Email营销可分为（）
- A、内部Email营销和外部Email营销
- B、经营型Email营销和非经营型Email营销
- C、顾客关系Email营销和顾客服务Email营销
- D、临时性的Email营销和长期Email营销
正确答案:B
第3题：
创建Email链接，在Link栏中使用的语句格式是：( )。
Ato:master@email.com
B link: master@email.com
C Email:master@email.com
D mailto: master@email.com
第4题：
An administrator receives a call from a user who is unable to receive email. After checking the workstation and email settings the administrator is still not able to determine the problem. Which of thefollowing is the NEXT step that the administrator should take？ （）
- A、 Create an action plan.
- B、 Escalate the issue.
- C、 Reboot the mail server.
- D、 Document the solution.
正确答案:B
第5题：
For security reasons a network technician wants to install a Linux based email server, Microsoft web services, and directory services on different servers. Which of the following technologies would be BEST to reduce hard ware costs?（）
- A、VPN concentrator
- B、Virtual servers
- C、Wireless
- D、Multimode fiber
正确答案:B
第6题：
查询student表中的所有非空email信息，以下语句正确的是（）。
- A、Select email from student where email !=null
- B、Select email from student where email not is null
- C、Select email from student where email <> null
- D、Select email from student where email is not null
正确答案:D
第7题：
ENUM的查询采用Client-Server的方式进行，Client端可以驻留在（）增值应用平台上。
- A、MMSC
- B、WAPGW
- C、SMGW
- D、Email系统
正确答案:A,B,C,D
第8题：
A. Local laws and industry regulations
B. Company policies and guidelines
C. Project guidelines given by stakeholders
D. Mail server and backup capacity
第9题：
Which of the following is the FIRST thing to consider when designing an email retention policy？（）
- A、 Local laws and industry regulations
- B、 Company policies and guidelines
- C、 Project guidelines given by stakeholders
- D、 Mail server and backup capacity
正确答案:A
第10题：
Which of the following will MOST likely cause major performance issues on an email server？（）
- A、 RAID 0 configuration
- B、 PBX software
- C、 DHCP server
- D、 Anti-virus software
正确答案:D