【单选题】【消耗次数：1】
解决IP欺骗技术的最好方法是安装过滤路由器，在该路由器的过滤规则中，正确的是:
①
允许包含内部网络地址的数据包通过该路由器进入
②
允许包含外部网络地址的数据包通过该路由器发出
③
在发出的数据包中，应该过滤掉源地址与内部网络地址不同的数据包
④
在发出的数据包中，允许源地址与内部网络地址不同的数据包通过
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
No one would have time to read or listen to an account of everything ____going on in the world.
①
it is
②
as is
③
there is
④
what is
【单选题】
They have done things they ought_____.
①
not to do
②
not to be done
③
not to have done
④
not having done
【单选题】
____ native to North America, corn has now spread all over the world.
①
In spite of
②
That it is
③
It was
④
Although
【单选题】
Bit by bit, a child makes the necessary changes to make his language ____.
①
as other people
②
as other people’s
③
like other people
④
like other people’s
【单选题】
Please____ me whether I should accept the offer.
①
advise
②
suggest
③
propose
④
direct
【单选题】
All the flights ____ because of the snowstorm, we had
to take the train instead.
①
were canceled
②
had been canceled
③
having canceled
④
having been canceled
【单选题】
A camera takes light rays bounced off objects and____ them
on a sheet of a film.
①
concentrates
②
mixes
③
combines
④
focuses
【单选题】
It has been proposed that we ____ our decision until the next meeting.
①
delayed
②
delay
③
can delay
④
are to delay
【单选题】
By the middle of the 21st century, the vast majority of the world’s population ____ in cities rather than in the country.
①
are living
②
will be living
③
have lived
④
will have lived