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單項選擇題 如圖所示。主機A與服務器進行通信。什么將會從服務器接收到主機A的幀的源MAC地址？（）

A.服務器的網絡接口的MAC地址
B.主機A的MAC地址
C.路由器接口e1 MAC地址
D.路由器接口e0 MAC地址（host A收到server的幀的源mac地址是host A的網關的mac。）

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1.單項選擇題Which IPv6 address is valid?（）

A.2031:0:130F::9C0:876A:130B
B.2001:0DB8:0000:130F:0000:0000:08GC:140B
C.2001:0DB8:0:130H::87C:140B
D.2031::130F::9C0:876A:130B

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2.單項選擇題Which protocol should be used to establish a secure terminal connection to a remote network device？Select the best response.（）

A.ARP
B.SSH
C.Telnet
D.WEP
E.SNMPv1
F.SNMPv2

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3.多項選擇題 Refer to the exhibit.The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem？（）

A.Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.
B.Ensure that cables A and B are straight-through cables.
C.Ensure cable A is plugged into a trunk port.
D.Ensure the switch has power.
E.Reboot all of the devices.
F.Reseat all cables.

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4.多項選擇題It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit.Which of the following processes are required to accomplish this task?（）

A.configure static frame relay map entries for each subinterface network.
B.remove the ip address from the physical interface
C.create the virtual interfaces with the interface command
D.configure each subinterface with its own IP address
E.disable split horizon to prevent routing loops between the subinterface networks
F.encapsulate the physical interface with multipoint PPP

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5.多項選擇題在OSI數據封裝過程中，以下哪項步驟描述正確？（）

A.傳輸層把一個數據流分成段，并可以增加可靠性和流控制信息。
B.數據鏈路層增加物理源和目的地地址以及一個FCS字段。
C.當網絡層封裝源和目的地主機的地址和協議相關的控制信息的幀分組被創(chuàng)建。
D.當網絡層增加了第3層的地址和控制信息，以一個段分組被創(chuàng)建。
E.表示層轉換位成電壓為通過物理鏈路傳輸。

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