單項選擇題What is valid reason for a switch to deny port access to new devices when port security is enabled?()

A.The denied MAC addresses have already been learned or confgured on another secure interface in the same VLAN.
B.The denied MAC address are statically configured on the port.
C.The minimum MAC threshold has been reached.
D.The absolute aging times for the denied MAC addresses have expired.


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1.單項選擇題What does the "Inside Global" address represent in the configuration of NAT()。

A.the summarized address for all of the internal subnetted addresses
B.the MAC address of the router used by inside hosts to connect to the Internet
C.a globally unique, private IP address assigned to a host on the inside network
D.a registered address that represents an inside host to an outside network

2.多項選擇題Which of the following IP addresses can be assigned to the host devices? ()

A.205.7.8.32/27
B.191.168.10.2/23
C.127.0.0.1
D.224.0.0.10
E.203.123.45.47/28
F.10.10.0.0/13

3.單項選擇題Which statement accurately describes a benefit provided by VTP()。

A.VTP allows routing between VLANs.
B.VTP allows a single port to carry information to more than one VLAN.
C.VTP allows physically redundant links while preventing switching loops.
D.VTP allows switches to share VLAN configuration information.

5.多項選擇題What are two benefits of using NAT?()

A.NAT protects network security because privat enetworks are not advertised.
B.NAT accelerates the routing process because no modifications are made on the packets.
C.Dynamic NAT facilitates connections from the outside of the network.
D.NAT facilitates end-to-end communication when IPsec is enable.
E.NAT eliminates the need to re-address all host that require extemal access.
F.NAT conserves addresses through host MAC-level multiplexing.

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請參見圖示。圖中所示路由表所屬的PC 已正確配置。IP 地址192.168.1.254屬于哪一個網(wǎng)絡(luò)設(shè)備或接口?()

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請參見圖示。公司路由器由于故障被更換。更換路由器之后,Education 辦公室內(nèi)的主機C 和D 能夠相互ping 通,但是無法訪問Accounts 辦公室內(nèi)的主機。此問題的原因可能是什么?()

題型:單項選擇題

請參見圖示。主機X 和主機Y 與本地網(wǎng)絡(luò)的通信受到限制。此問題的原因是什么?()

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下列哪些是私有IP 地址的地址范圍?()

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OSI 哪一層可提供有序的數(shù)據(jù)重構(gòu)服務(wù)?()

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