多項選擇題下面哪些選項是物理層的基本功能？（）

A.在終端設備之間傳送比特流
B.建立、維護虛電路，進行差錯校驗和流量控制
C.定義電壓、接口、線纜標準、傳輸距離等特性


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1.單項選擇題IP地址190.233.27.13/16所在的網段地址是（）。

A.190.0.0.0
B.190.233.0.0
C.190.233.27.0
D.190.233.27.1

2.單項選擇題可路由協議的網絡地址由哪兩部分組成？（）

A.網絡地址和主機地址
B.主機地址和網絡掩碼
C.網絡地址和網絡掩碼

3.單項選擇題RFC文檔是下面哪一個標準的工作文件？（）

A.ISO
B.ITU
C.IETF
D.IEEE

4.多項選擇題What are three advantages of VLANs?（）

A.VLANs establish broadcast domains in switched networks.
B.VLANs utilize packet filtering to enhance network security.
C.VLANs provide a method of conserving IP addresses in large networks.
D.VLANs provide a low-latency internetworking alternative to routed networks.
E.VLANs allow access to network services based on department, not physical location.
F.VLANs can greatly simplify adding, moving, or changing hosts on the network.

6.多項選擇題局域網常用設備有（）。

A.線纜，如光纖、雙絞線、同軸電纜等
B.集線器
C.MODEM
D.路由器

7.單項選擇題ISO提出OSI的關鍵是（）。

A.網絡互聯
B.網絡分層
C.七層模型
D.制定標準

8.多項選擇題Which two statements are true about the command ip route 172.16.3.0 255.255.255.0 192.168.2.4 (Choose two.)（）。

A.It establishes a static route to the 172.16.3.0 network
B.It establishes a static route to the 192.168.2.0 network
C.It configures the router to send any traffic for an unknown destination to the 172.16.3.0 network
D.It configures the router to send any traffic for an unknown destination out the interface with the address 192.168.2.4
E.It uses the default administrative distance
F.It is a route that would be used last if other routes to the same destination exist

10.單項選擇題以太網中，是根據（）地址來區(qū)分不同的設備的。

A.IP地址
B.MAC地址
C.IPX地址
D.LLC地址