●一个局域网中某台主机的IP地址为176.68.160.12，使用22位作为网络地址，那么该局域网的子网掩码为__(61)__，最多可以连接的主机数为__(62)__。
（61）A．255.255.255.0
B．255.255.248.0
C．255.255.252.0
D．255.255.0.0
（62）A．254
B．512
C．1022
D．1024

●以下选项中，可以用于Internet信息服务器远程管理的是__(63)__。
（63）A．Telnet
B．RAS
C．FTP
D．SMTP

●在TCP/IP网络中，为各种公共服务保留的端口号范围是__(64)__。
（64）A．1～255
B．1～1023
C．1～1024
D．1～65535

●在以下网络应用中，要求带宽较高的应用是__(65)__。
（65）A．可视电话
B．数字电视
C．拨号上网
D．收发邮件

●DOM is a platform-and language-__(66)__API that allows programs and scripts to dynamically access and update the content，structure and style of WWW documents(currently，definitions for HTML and XML documents are part of the specification).The document can be further processed and the results of that processing can be incorporated back into the presented __(67)__.DOM is a __(68)__-based API to documents，which requires the whole document to be represented in __(69)__while processing it.A simpler alternative to DOM is the event–based SAX，which can be used to process very large __(70)__documents that do not fit info the memory available for processing.
（66）A．specific
B．neutral
C．contained
D．related
（67）A．text
B．image
C．page
D．graphic
（68）A．table
B．tree
C．control
D．event
（69）A．document
B．processor
C．disc
D．memory
（70）A．XML
B．HTML
C．script
D．web