Cell Phones: Hang Up or Keep Talking Millions of people are using cell phones today. In many places it is actually considered unusual not to use one. In many countries, cell phones are very popular with young people. They find that the phones are more than a means of communication-having a mobile phone shows that they are cool and connected. The explosions around the world in mobile phone use make some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England. there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health. On the other hand, why do some medical studies show changes in the brain cells of some people who use mobile phones Signs of change in the tissues of the brain and head can be detected with modern scanning(扫描)equipment. In one case, a traveling salesman had to retire at a young age because of serious memory loss. He couldn’t remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer’s doctor didn’t agree. What is it that makes mobile phones potentially harmful The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about. As the discussion about their safety continues, it appears that it’s best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it’s wise not to use your mobile phone too often.On the safety issue of mobile phones, the manufacturing companies-综合类-总题库

Cisco路由器执行show access-list命令显示如下一组信息：
Standard IP access list block
deny 10.0.0.0, wildcard bits 0.255.255.255 log
deny 172.16.0.0, wildcard bits 0.15.255.255
permit any
根据上述信息，正确的access-list配置是

A:Router(config) # access-list standard block B:Router(config-std-nac1) # deny 10.0.0.0 255.0.0.0 log C:Router(config-std-nac1) # deny 172.16.0.0 255.240.0.0 D:Router(config-std-nac1) # permit any E:Router(config) # ip access-list standard block F:Router(config-std-nac1) # permit any G:Router(config-std-nac1) # deny 10.0.0.0 0.255.255.255 log H:Router(config-std-nac1) # deny 172.16.0.0 0.15.255.255 I:Router(eonfig) # ip access-list standard block J:Router(config-std-nac1) # deny 10.0.0.0 255.0.0.0 log K:Router(config-std-nac1) # deny 172.16.0.0 255.240.0.0 L:Router(config-std-nac1) # permit any M:Router(config) # ip access-list standard block N:Router(config-std-nac1) # deny 10.0.0.0 0.255.255.255 log

Cisco路由器执行show access-list命令显示如下一组信息
Standard IP access list block
deny 10.0.0.0, wildcardbits 0.255.255.255 log
deny 172.16.0.0, wildcard bits 0.15.255.255
permit any
根据上述信息，正确的access-list配置是（）

A:Router (config) #access-list standard block B:Router (config-std-nacl) #deny 10.0.0.0 255.0.0.0 log C:Router (config-std-nacl) #deny 172.16.0.0 255.240.0.0 D:Router (config-std-nacl) #permit any E:Router (config) #ip access-list standard block F:Router (config-std-nacl) #permit any G:Router (config-std-nacl) #deny 10.0.0.0 0.255.255.255 log H:Router (config-std-nacl) #deny 172.16.0.0 0.15.255.255 I:Router (config) #ip access-list standard block J:Router (config-std-nacl) #deny 10.0.0.0 255.0.0.0 log K:Router (config-std-nacl) #deny 172.16.0.0 255.240.0.0 L:Router (config-std-nacl) #permit any M:Router (config) #ip access-list standard block N:Router (config-std-nacl) #deny 10.0.0.0 0.255.255.255 log

Cisco路由器执行show access-list命令显示如下一组控制列表信息
Standard IP access list 30
deny 127.0.0.0，wildcard bits 0.255.255.255
deny 172.16.0.0，wildcard bits 0.15.255.255
permit any
根据上述信息，正确的access-list配置是______。

A:Router(config)#access-list 30 deny 127.0.0.0 255.255.255.0 B:Router(config)#access-list 30 deny 172.16.0.0 255.240.0.0 C:Router(config)#access-list 30 permit any D:Router(config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.255 E:Router(config-std-nacl)#access-list 30 deny 172.16.0.0 0.15.255.255 F:Router(config-std-nael)#access-list 30 permit any G:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255 H:Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255 I:Router(config)#access-list 30 permit any J:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255 K:Router(config)#access-list 30 permit any L:Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255

A:Router(config)#access-fist 30 deny 127.0.0.0 255.255.255.0 B:Router(config)#access-list 30 deny 172.16.0.0 255.240.0.0 C:Router(config)#access-list 30 permit any D:Router(config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.255 E:Router(config-std-nac])#ae(3ess-list 30 deny 172.16.0.0 0.15.255.255 F:Router(config-std-nael)#access-list 30 permit any G:Router(config)#access-fist 30 deny 127.0.0.0 0.255.255.255 H:Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255 I:Router(config)#access-list 30 permit any J:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255 K:Router(config)#access-list 30 permit any L:Router(config)#aecess-list 30 deny 172.16.0.0 0.15.255.255

A:Router(config)#access-list 30 deny 127.0.0.0 255.255.255.0 B:Router(config)#access-list 30 deny 172.1 6.0.0 255.240.0.0 C:Router(config)#access-list 30 permit any D:Router(config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.255 E:Router(config-std-nacl)#access-list 30 deny 172.16.0.0 0.15.255.255 F:Router(config-std-nacl)#access-list 30 permit any G:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255 H:Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255 I:Router(config)#access-list 30 pemait any J:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255 K:Router(config)#access-list 30 permit any L:Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255

在一台Cisco路由器上执行show access-list 命令显示如下一组信息 Extended IP access list port4444 permit icmp 202.38.97.0,wildcard bits 0.0.0.255 any deny icmp any any deny udp any any eq 1434 deny tcp any any eq 4444 permit ip any any 根据上述信息，正确的access-list的配置是

A:Router(config)#ip access-list extended port4444
Router(config-ext-nacl)#deny icmp any any
Router(config-ext-nacl)#deny udp any any eq 1434
Router(config-ext-nacl)#deny tcp any any eq 4444
Router(config-ext-nacl)#permit icmp 202.38.97.0 0.0.0.255 any
Router(config-ext-nacl)#permit ip any any B:Router(config)#access-list port4444 permit icmp 202.38.97.0 0.0.0.255 any
Router(config)#access-list port4444 deny icmp any any
Router(config)#access-list port4444 deny udp any any eq 1434
Router(config)#access-list port4444 deny tcp any any eq 4444
Router(config)#access-list port4444 permit ip any any C:Router(config)#ip access-list extended port4444
Router(config-ext-nacl)#permit icmp 202.38.97.0 0.0.0.255 any
Router(config-ext-nacl)#deny any any icmp
Router(config-ext-nacl)#deny udp any any eq 1434
Router(config-ext-nacl)#deny tcp any any eq 4444
Router(config-ext-nacl)#permit ip any any D:Router(config)#ip access-list extended port4444
Router(config-ext-nacl)#permit icmp 202.38.97.0 0.0.0.255 any
Router(config-ext-nacl)#deny icmp any any
Router(config-ext-nacl)#deny udp any any eq 1434
Router(config-ext-nacl)#deny tcp any any eq 4444
Router(config-ext-nacl)#permit ip any any

Cisco路由器执行show access-list命令显示如下一组信息
　　Standard IP access list block
　　deny 10.0.0.0, wildcardbits 0.255.255.255 log
　　deny 172.16.0.0, wildcard bits 0.15.255.255
　　permit any
　　根据上述信息，正确的access-list配置是（）

Cisco路由器执行show access-list命令显示如下一组信息　　Standard IP access list block　　deny 10.0.0.0, wildcardbits 0.255.255.255 log　　deny 172.16.0.0, wildcard bits 0.15.255.255　　permit any　　根据上述信息，正确的access-list配置是

A:Router (config) #access-list standard block 　　Router (config-std-nacl) #deny 10.0.0.0 255.0.0.0 log　　Router (config-std-nacl) #deny 172.16.0.0 255.240.0.0　　Router (config-std-nacl) #permit any B:Router (config) #ip access-list standard block 　　Router (config-std-nacl) #permit any　　Router (config-std-nacl) #deny 10.0.0.0 0.255.255.255 log 　　Router (config-std-nacl) #deny 172.16.0.0 0.15.255.255 C:Router (config) #ip access-list standard block　　Router (config-std-nacl) #deny 10.0.0.0 255.0.0.0 log　　Router (config-std-nacl) #deny 172.16.0.0 255.240.0.0　　Router (config-std-nacl) #permit any D:Router (config) #ip access-list standard block 　　Router (config-std-nacl) #deny 10.0.0.0 0.255.255.255 log　　Router (config-std-nacl) #deny 172.16.0.0 0.15.255.255 　　Router (config-std-nacl) #permit any

Cisco路由器执行show access-list命令显示如下一组控制列表信息：
Standard IP acceSS list 30
deny 127.0.0.0，wildcard bits 0.255.255.255
deny 172.16.0.0，wiidcard bits 0.15.255.255
permft any
根据上述信息，正确的access-list配置是（）。

A:Router(config)#access-list 30 deny 127.0.0.0 255.255.255.0
Router(config)#access-list 30 deny 172.16.0.0 255.240.0.0
Router(config)#access-list 30 permit any B:Router(config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.255
Router(config-std-nael)#access-list 30 deny 172.16.0.0 0.15.255.255
Router(config-std-nacl)#access-list 30 permit any C:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255
Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255
Router(config)#access-list 30 permit any D:Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255
Router(config)#access-list 30 permit any
Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255

A:Router（config)#access-list 30 deny 127.0.0.0 255.255.255.0 Router（config)#access-list 30 deny 172.16.0.0 255.240.0.0 Router（config)#access-list 30 permit any B:Router（config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.255 Router（config-std-nael)#access-list 30 deny 172.16.0.0 0.15.255.255 Router（config-std-nacl)#access-list 30 permit any C:Router（config)#access-list 30 deny 127.0.0.0 0.255.255.255 Router（config)#access-list 30 deny 172.16.0.0 0.15.255.255 Router（config)#access-list 30 permit any D:Router（config)#access-list 30 deny 127.0.0.0 0.255.255.255 Router（config)#access-list 30 permit any Router（config)#access-list 30 deny 172.16.0.0 0.15.255.255

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