單項選擇題RFC文檔是下面哪一個標(biāo)準(zhǔn)的工作文件？（）

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


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1.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.

3.多項選擇題局域網(wǎng)常用設(shè)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

4.單項選擇題ISO提出OSI的關(guān)鍵是（）。

A.網(wǎng)絡(luò)互聯(lián)
B.網(wǎng)絡(luò)分層
C.七層模型
D.制定標(biāo)準(zhǔn)

5.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

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