80
110
123
143
443
第1题：
A.SMTP
B.SIP
C.HTTP
D.SSL
第2题：
A.21
B.25
C.80
D.110
E.123
第3题：
A.TRACERT
B.IPCONFIG/ALL
C.NSLOOKUP
D.PING-T
第4题：
An administrator replaces the network card in a web server. After replacing the network card some users can access the server but others cannot. Which of the following is the FIRST thing the administrator should check？（）
第5题：
Which of the following ports is used by default for IMAP traffic?（）
第6题：
A.80
B.110
C.123
D.143
E.443
第7题：
Which of the following protocols is used to encrypt data between web servers and web browsers?（）
第8题：
A.80
B.143
C.443
D.8080
第9题：
Which of the following ports would have to be allowed through a firewall to allow SNMP traffic topass on its default port?（） (Select TWO).
第10题：
By default, which of the following ports would a network need to have opened to allow for thetransmission of incoming and outgoing email?（） (Select TWO).