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多項(xiàng)選擇題Which three statements accurately describe layer 2 Ethernet switches?（）

A.Microsegmentation decreases the number of collisions on the network.
B.if a switch receives a frame for an unkown destination,it uses ARP to resolve the address.
C.Spanning Tree Protocol allows switches to automatically share vlan information.
D.In a properly functioning network with redundant switched paths,each switched aegment will contain one root bridge with all its ports in the forwarding state.All other switches in that broadcast domain will have only one root port.
E.Establishing vlans increases the number of broadcast domains.
F.Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.

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1.單項(xiàng)選擇題 S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology shown in the exhibit. Originally， static routes were configured between these routers to successfully route traffic between the attached networks. What will need to be done in order to use RIPv2 in place of the static routes？（）

A.Configure the no ip subnet-zero command on R1,R2,and R3.
B.Dynamic routing protocols such as RIPv2 cannot be used across Frame Relay networks.
C.Configure the S0/0 interface on R1 as two subinterfaces and configure point-to-point links to R2 and R3.
D.Change the 172.16.2.0/25 and 172.16.2.128/25 subnetworks so that at least two bits are borrowed from the last octet.
E.Change the network address configuration to eliminate the discontiguous 172.16.2.0/25 and 172.16.2.128/25 subnetwork.

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2.多項(xiàng)選擇題 Which destination addresses will be used by Host A to send data to Host C？（）

A. the IP address of Switch 1
B. the MAC address of Switch 1
C. the IP address of Host C
D. the MAC address of Host C
E. the IP address of the router’s E0 interface
F. the MAC address of the router’s E0 interface

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3.多項(xiàng)選擇題 An administrator is unsuccessful in adding VLAN 50 to a switch. While troubleshooting the problem，the administrator views the output of the show vtp status command， which is displayed in the graphic. What commands must be issued on this switch to add VLAN 50 to the database？（）

A. Switch（config-if）# switchport access vlan 50
B. Switch（vlan）# vtp server
C. Switch（config）# config-revision 20
D. Switch（config）# vlan 50 name Tech
E. Switch（vlan）# vlan 50
F. Switch（vlan）# switchport trunk vlan 50

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4.單項(xiàng)選擇題You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.Which IP address range meets these requirements?（）

A.10.188.31.0/27
B.10.188.31.0/26
C.10.188.31.0/29
D.10.188.31.0/28
E.10.188.31.0/25

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5.單項(xiàng)選擇題 Refer to the exhibit.A network technician is asked to design a small network with redundancy. The exhibit represents this design， with all hosts configured in the same VLAN. What conclusions can be made about this design？（）

A.The design will function as intended
B.Spanning-tree will need to be used.
C.The router will not accept the addressing scheme.
D.The connection between switches should be a trunk.
E.The router interfaces must be encapsulated with the 802.1Q protocol.

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6.單項(xiàng)選擇題Assuming the default switch configuration,which approach should you use to configure the extended vlan range(1006 through 4094) on a cisco catalyst 3750 series switch?（）

A.Configure the switch to be in VTP client mode.
B.Configure the switch to be in VTP domaint mode.
C.Configure the switch to be in VTP transparent mode.
D.Configure the switch to be in VTPv2.

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7.多項(xiàng)選擇題Which two commands can be used to verify a trunk link configurationt status on a given cisco switch?（）

A.show interfaces interface
B.show interfaces interface trunk
C.show interfaces interface switchport
D.show ip interface brief
E.show interfaces vlan

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8.單項(xiàng)選擇題 Refer to the exhibit.After a RIP route is marked invalid on Router_1， how much time will elapse before that route is removed from the routing table？（）

A.30 seconds
B.60 seconds
C.90 seconds
D.180 seconds
E.240 seconds

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9.單項(xiàng)選擇題In which integration method is an IPV6 packet encapsulated within an IPV4 protocol?（）

A.proxy
B.dual-stack
C.tunneling
D.dot1q

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10.單項(xiàng)選擇題The enable secret command is used to secure access to which CLI mode?（）

A.user EXEC mode
B.global configuration mode
C.privileged EXEC mode
D.auxiliary setup mode

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