视频会议设备提示“网络IP显示0.0.0.0 或者 无法注册网闸”，以下描述正确的是（）

A.Telnet

B.onsole

C.Web

D.Ping

A.20.22.25.0

B.20.22.0.0

C.20.0.0.0

D.0.0.0

A.192.168.0.1

B.从公司的DHCP服务器自动获得

C.是192.168.0.0/16网段的随机IP地址

D.是0.0.0

A.PPPOE用户名或密码错误

B.无法获得IP地址

C.PPPOE上层接入设备问题

D.用户的业务账号或密码输错

A.系统应具备多媒体通信应用平台的特性，适当考虑可扩展性

B.关键设备选用基于IP的网络视频会议产品，界面要友好、操作要简捷

C.支持MPEG-2视频压缩技术、多种视频格式、多分屏显示及任意切换

D.语音清晰流畅，支持音频双向传输

A.ip route 172.16.1.0 255.255.255.0 0.0.0.0

B.ip route 172.16.1.0 255.255.255.0 172.16.2.1

C.ip route 0.0.0 255.255.255.0 172.16.2.1

D.ip route 0.0.0.0 0.0.0.0 172.16.2

A.近程定检

B.现场定检

C.网络定检

D.设备定检

A) access-list 198 permit icmp 166.129.130.0 255.255.255.0 any

access-list 198 deny icmp any any

access-list 198 permit ip any any

B) access-list 198 permit icmp 166.129.130.0 0.0.0 255 any

access-list 198 deny icmp any any

access-list 198 permit ip any any

C) access-list 99 permit icmp 166.129.130.0 0.0.0 255 any

access-list 99 deny icmp any any

access-list 99 permit ip any any

D) access-list 100 permit icmp 166.129.130.0 0.0.0 255 any

access-list 100 pernut ip any any

access-list 100 deny icmp any any

A.178.0.0.0

B.178.20.0.0

C.178.20.35.0

D.0.0.0