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多項選擇題Which two of these statements regarding RSTP are correct？（）

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.

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1.單項選擇題A cisco router is booting and has just completed the POST process.It is now ready to find and load an IOSimage.what function does the router perform next?（）

A.It checks the configuration register
B.It attempts to boot from a TFTP server
C.It loads the first image file in flash memory
D.It inspects the configuration file in NVRAM for boot instructions

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2.單項選擇題Which command enables IPv6 forwarding on a cisco router?（）

A.ipv6 host
B.ipv6 unicast-routing
C.ipv6 local
D.ipv6 neighbor

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3.單項選擇題A system administrator installed a new switch using a script to configure it. IP connectivity was tested using pings to SwitchB. Later attempts to access NewSwitch using Telnet from SwitchA failed. Which statement is true？（）

A.Executing password recovery is required.
B.The virtual terminal lines are misconfigured.
C.Use Telnet to connect to RouterA and then to NewSwitch to correct the error.
D.Power cycle of NewSwitch will return it to a default configuration.

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4.多項選擇題 Refer to the exhibit.This command is executed on 2960Switch：
2960Switch（config）# mac-address-table static 0000.00aa.aaaa vlan 10 interface fa0/1
Which two of these statements correctly identify results of executing the command？（）

A.Port security is implemented on the fa0/1 interface.
B.MAC address 0000.00aa.aaaa does not need to be learned by this switch.
C.Only MAC address 0000.00aa.aaaa can source frames on the fa0/1 segment.
D.Frames with a Layer 2 source address of 0000.00aa.aaaa will be forwarded out fa0/1.
E.MAC address 0000.00aa.aaaa will be listed in the MAC address table for interface fa0/1 only.

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5.單項選擇題In the implementation of VLSM techniques on a network using a single Class C IP address,which subnet mask is the most efficient for point-to-point serial links?（）

A.255.255.255.240
B.255.255.255.254
C.255.255.255.252
D.255.255.255.0
E.255.255.255.248

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6.多項選擇題What are three benefits of implementing vlans?（）

A.A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure
B.Broadcast storms can be mitigated by decreasing the number of broadcast domains,thus increasing their size.
C.A higher level of network security can be reached by separating sensitive data traffic from other network traffic.
D.Port-based vlans increase switch-port use efficient,thanks to 802.1Q trunks
E.A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure.
F.Broadcast storms can be mitigated by increasing the number of broadcast domains,thus reducing their size.
G. VLANs make it easier for IT staff to configure new logical groups,because the vlans all belong to the same broadcast domain.

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7.多項選擇題 哪個目的地址將被用于主機A發(fā)送數(shù)據(jù)到主機C？（）

A.交換機1的IP地址
B.交換機1的MAC地址
C.主機C的IP地址
D.主機C的MAC地址
E.路由器的E0接口的IP地址
F.路由器的E0接口的MAC地址

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8.單項選擇題路由發(fā)生在DOD模型的哪一層？（）

A.應(yīng)用
B.網(wǎng)絡(luò)
C.傳輸

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9.多項選擇題Switch ports operating in which two roles will forward traffic according to the IEEE 802.1w standard？（）

A.alternate
B.backup
C.designated
D.disabled
E.root

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10.多項選擇題哪三種說法準確描述2層以太網(wǎng)交換機？（）

A.微分割減小了網(wǎng)絡(luò)上的沖突次數(shù)。
B.如果交換機收到一個幀一個未知的目的地，它使用ARP解析地址。
C.生成樹協(xié)議允許交換機自動共享VLAN信息。
D.在一個功能正常的網(wǎng)絡(luò)冗余的交換路徑，每個交換環(huán)節(jié)將包含其轉(zhuǎn)發(fā)狀態(tài)的所有端口一個根橋。在廣播域中所有其它交換機將只有一個根端口。
E.建立的VLAN增加廣播域的數(shù)量。
F.配置有VLAN的交換機使基于第2層和第3層地址信息轉(zhuǎn)發(fā)決策。

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