Which of the following is a layer 3 device that separates broadcast domains?（）
第1题：
“X线”的英文全称是
A、X-Bay
B、X-Day
C、X-Hay
D、X-Lay
E、X-Ray
第2题：
第3题：
Which of the following is not an AVL tree?
A．
B．
C．
D．
第4题：
Which of the following utilities are used to choose which programs run at startup？ （）
第5题：
社交网络的数据分层有几种？（）
第6题：
第7题：
In the OSI model, which of the following layers would be the cause of a session time-out while browsing the web?（）
第8题：
A.Laye r2
B.Layer 3
C.Layer 5
D.Layer 7
第9题：
Which of the following is a performance optimization technology?（）
第10题：
Which of the following commands will be run at a command prompt to determine which WindowsOS is running on the computer?（）