赞题库-背景图

单项选择题

下列关于无线网络HiperLAN/2协议的描述中，错误的是______。

A．采用5GHz工作频段
B．上行速率最多可达54Mbps
C．室外最大覆盖范围为30米
D．可支持面向连接的传输服务

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热门试题

单项选择题某园区网采用OSPF路由协议，参与OSPF的网络地址是169.111.0.0 16，Cisco路由器的正确配置是______。

A．Router (config-router) # network 169.111.0.0 0.0.0.0 area 0Router (config-router) # area 0 range 169.111.0.0 255.255.0.0
B．Router (config) # router ospf 63Router (config-router) # network 169.111.0.0 255.255.0.0 area 0Router (config-router) # area 0 range 169.111.0.0 255.255.0.0
C．Router (config) # router ospf 63Router (config-router) # network 169.111.0.0 0.0.255.255 area 0Router (config-router) # area 0 range 169.111.0.0 255.255.0.0
D．Router (config) # router ospf 63Router (config-router) # network 169.111.0.0 0.0.255.255 area 0Router (config-router) # area 0 range 169.111.0.0 0.0.255.255

单项选择题定义一个用于封禁ICMP协议而只允许转发166.129.130.0 24子网的ICMP数据包的访问控制列表，Cisco路由器的正确配置是______。

A．access-list 198 permit icmp 166.129.130.0 255.255.255.0 anyaccess-list 198 deny icmp any anyaccess-list 198 permit ip any any
B．access-list 198 permit icmp 166.129.130.0 0.0.0.255 anyaccess-list 198 deny icmp any anyaccess-list 198 permit ip any any
C．access-list 99 permit icmp 166.129.130.0 0.0.0.255 anyaccess-list 99 deny icmp any anyaccess-list 99 permit ip any any
D．access-list 100 permit icmp 166.129.130.0 0.0.0.255 anyaccess-list 100 permit ip any anyaccess-list 100 deny icmp any any