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問答題網(wǎng)絡安全涉及到OSI哪幾層？

參考答案： Layer 7：application layer
Layer 6：presen...

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1.單項選擇題You are responsible for network monitoring and need to monitor traffic over a routed network from a remote source to an IDS or IPS located in the headquarters site. What would you use in order to accomplish this？（）

A.VACLs and VSPAN
B.RSPAN
C.ERSPAN
D.NetFlow

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2.單項選擇題Which of the following describes the appropriate port assignment and message exchange in a standard TFTP transaction？（）

A.Server： 10.0.0.1：69 RRQ/WRQ Sent；Client： 10.0.0.2：1888 RRQ/WRQ Received
B.Server： 10.0.0.1：1888 RRQ/WRQ Received；Client： 10.0.0.2：69 RRQ/WRQ Received
C.Server： 10.0.0.1：69 RRQ/WRQ Received；Client： 10.0.0.2：69 RRQ/WRQ Sent
D.Server： 10.0.0.1：69 RRQ/WRQ Received；Client： 10.0.0.2：1888 RRQ/WRQ Sent
E.Server： 10.0.0.1：1888 RRQ/WRQ Sent；Client： 10.0.0.2：69 RRQ/WRQ Sent
F.Server： 10.0.0.1：1888 RRQ/WRQ Received；Client： 10.0.0.2：69 RRQ/WRQ Sent

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3.問答題網(wǎng)絡安全涉及到TCP/IP哪幾層？

參考答案：Layer 1 （Network interface LayerQ...

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4.單項選擇題You are deploying two core switches，one in each building，50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state，and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？（）

A.The switches are not the same model.
B.You are not using the correct SFP.
C.You are not using correct optical media converters.
D.Configuration should be modified， because the distance is longer.

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5.單項選擇題Customer X has a hub-and-spoke Frame Relay network， with a central office and two branch offices（RemoteA and RemoteB）. Each location has only one physical link to the Frame Relay cloud and RemoteB has a router that is not a Cisco router. Since the installation，there is no connectivity between RemoteB and the central office. What is a possible solution to this issue？（）

A.Because Frame Relay IETF encapsulation is only configurable at interface level， you must use IETF encapsulation on all routers.
B.This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.
C.The router at RemoteB must be replaced by a Cisco router.
D.Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.
E.There is a problem in the Frame Relay cloud， because Cisco routers are compatible with IETF Frame Relay.

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