Refer to the exhibit.A junior network administrator was given the task of configuring port security on SwitchA to allow only PC_A to access the switched network through port fa0/1. If any other device is detected， the port is to drop frames from this device. The administrator configured the interface and tested it with successful pings from PC_A to RouterA， and then observes the output from these two show commands. Which two of these changes are necessary for SwitchA to meet the requirements？（）
A.Port security needs to be globally enabled.
B.Port security needs to be enabled on the interface.
C.Port security needs to be configured to shut down the interface in the event of a violation.
D.Port security needs to be configured to allow only one learned MAC address.
E.Port security interface counters need to be cleared before using the show command.
F.The port security configuration needs to be saved to NVRAM before it can become active.
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A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR, FHSS, and DSSS
A.802.1Q native VLAN frames are untagged by default.
B.802.1Q trunking ports can also be secure ports.
C.802.1Q trunks can use 10 Mb/s Ethernet interfaces.
D.802.1Q trunks require full-duplex， point-to-point connectivity.
E.802.1Q trunks should have native VLANs that are the same at both ends.
A.172.31.17.4/30
B.172.31.51.16/30
C.172.31.64.0/18
D.172.31.80.0/22
E.172.31.92.0/22
F.172.31.192.0/18
A.在二層唯一確定一臺設備
B.是設備在不同的網(wǎng)絡中通信
C.區(qū)別二層和三層幀
D.確定設備的優(yōu)先級
E.是同一網(wǎng)絡的不同設備可以通信
F.當不知道遠程設備的物理地址時可以查詢
A.RSTP cannot operate with PVST+.
B.RSTP defines new port roles.
C.RSTP defines no new port states.
D.RSTP is a proprietary implementation of IEEE 802.1D STP.
E.RSTP is compatible with the original IEEE 802.1D STP.
最新試題
請參見圖示。主機A 嘗試與主機C 建立TCP/IP 會話。在嘗試期間，路由器Y 的FastEthernet 接口fa0/1捕獲到一個幀。捕獲的幀中包含源IP 地址為172.16.1.5而目的IP 地址為172.16.7.24的數(shù)據(jù)包。捕獲該幀時，它的源MAC 地址是什么？（）
請參見圖示。當計算機A 向計算機D 發(fā)送幀時，哪些計算機會接收該幀？（）
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在路由器上使用Router#copy running-config startup-config 命令會產(chǎn)生什么效果？（）
請參見圖示。網(wǎng)絡中的所有設備均使用默認配置。此拓撲中需要多少個邏輯地址范圍？（）
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路由器使用哪一項信息來確定源主機和目的主機之間的路徑？（）
OSI 模型的哪兩項功能在第2層實現(xiàn)？（）
請參見圖示。一臺主機正使用NAT 連接到Internet。下列哪三項IP 地址可實現(xiàn)此連接？（）
請參見圖示。網(wǎng)絡中的主機A 正在向主機B 發(fā)送數(shù)據(jù)段。有關所交換的數(shù)據(jù)段的流量控制如圖所示。下列關于此通信的陳述，哪兩項是正確的？（）