C.PSTN拨号线路                                                     D.帧中继

8．在Internet中发送电子邮件使用的协议是

A.SNMP协议                                                            B.SMTP协议

C.POP协议                                                                D.IMCP协议

9．网络新闻组(USENET)进行收发网络新闻使用的协议是

A.TCP                                                                         B.UDP

C.HTTP                                                                       D.NNTP

10．下列属于合法的java script变量名的是

A.true                                                                          B.3d

C.abc *                                                                        D._abc

11.用作商业组织的域名是

A.com                                                                          B.edu

C.gov                                                                           D.cn

12．用HTML制作网页时，用一系列的标记符号描述其格式。标记名是写在

A.{ }内                                                                        B.［］内

C.< >内