单选题A switch is configured with all ports assigned to vlan 2 with full duplex FastEthernet to segment existing departmental traffic. What is the effect of adding switch ports to a new VLAN on the switch?（）A More collision domains will be created.B IP addre

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单选题

A switch is configured with all ports assigned to vlan 2 with full duplex FastEthernet to segment existing departmental traffic. What is the effect of adding switch ports to a new VLAN on the switch?（）

More collision domains will be created.

IP address utilization will be more efficient.

More bandwidth will be required than was needed previously.

An additional broadcast domain will be created.

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第1题：

A new switch is installed in the Ezonexam network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network.

Which of the conditions below have to be met in order for this to occur? (Choose all that apply).

A. The switch that will share the VLAN information must be in the VTP Server mode.

B. The switches must be in the same VTP domain.

C. The switch that will share the VLAN information must be configured as the root bridge.

D. The switches must be configured to use the same VTP version.

E. The switches must be configured to use the same STP version.

F. The switches must be configured to use the same type of ID tagging.

G. The switches must be connected over VLAN trunks.

正确答案：ABFG
A,B,F,G 解析：Explanation:
For the VLAN information to pass automatically throughout the network, VTP must be set up correctly. In order for VTP to work, a VTP server is needed, the VLAN's must be in the same VTP domain, and the encapsulation on each end of the trunk must both set to either 802.1Q or ISL.

Incorrect Answers:
C. Root bridges and other functions of the Spanning Tree Protocol (STP) have no impact of the VTP configuration.

D, E. There is only one version of VTP and STP.

第2题：

A、More collision domains will be created.
B、IP address utilization will be more efficient.
C、More bandwidth will be required than was needed previously.
D、An additional broadcast domain will be created.

正确答案:D

第3题：

There are 2 switches in the Ezonexam LAN, with no routers. Ports 1, 2 & 3 are assigned to VLAN 1 in switch 1 and 2 and ports 4, 5 & 6 are assigned to VLAN 2 in both switches. These two switches are connected together via a trunked link. Which of the conditions below would verify trunk and VLAN operation? (Select all valid answers)

A．Host 1 on VLAN 1 can ping Host 2 on VLAN 1

B．Host 1 on VLAN 1 can ping Host 4 on VLAN 2

C．Host 1 on VLAN 1 can not ping Host 2 on VLAN 1

D．Host 4 on VLAN 2 can not ping Host 1 on VLAN 1

E．Host 4 on VLAN 2 can ping Host 2 on VLAN 2

正确答案：ADE
解析：Explanation:
If there is no router present, only hosts in the same VLAN will be able to ping each other. In order for any host on one VLAN to communicate with a host on another VLAN, the traffic must pass through a router. Host within the same VLAN will be able to ping each other, even though they reside on different switches, as long as the switches have a trunk connection configured between them.

第4题：

The DAI feature has been implemented in the Company switched LAN. Which three statements are true about the dynamic ARP inspection （DAI） feature？（）

A、 DAI can be performed on ingress ports only.
B、 DAI can be performed on both ingress and egress ports.
C、 DAI is supported on access ports， trunk ports， EtherChannel ports， and private VLAN ports.
D、 DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP caches of hosts in the domain.
E、 DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.
F、 DAI is supported on access and trunk ports only.

正确答案:A,C,E

第5题：

Which statement describes a spanning-tree network that has converged?（）

A、All switch and bridge ports are in the forwarding state.
B、All switch and bridge ports are assigned as either root or designated ports.
C、All switch and bridge ports are in either the forwarding or blocking state.
D、All switch and bridge ports are either blocking or looping.

正确答案:C

第6题：

You need to create a new VLAN on your Catalyst switch. This VLAN is to be named EZONEXAM. Which of the following need to be completed for the creation of this new VLAN? (Select all that apply)

A. The EZONEXAM VLAN must be created.

B. The desired ports must be added to the new EZONEXAM VLAN.

C. The EZONEXAM VLAN must be added to all of the domains.

D. The EZONEXAM VLAN must be named.

E. An IP address must be configured for the EZONEXAM VLAN.

F. None of the above. VLAN creations are automatic.

正确答案：ABD
A,B,D 解析：Explanation:
Creating a VLAN is done in 3 steps:
1. Create the VLAN
2. Name the VLAN
3. Assign ports to the VLAN

From there, other features and functionality can be configured, but these are the only steps that are required for the addition of a VLAN.

Incorrect Answers:
C. The VLAN needs only to be added to a single switch, where it can act as a stand-alone VLAN, or it can be transferred to other switches in the network through the use of the VTP protocol.

E. VLANs operate at layer 2, and although many are configured with a layer 3 IP address, it is not absolutely necessary to do this.

第7题：

You are assigning VLANs to the ports of switch R1. What VLAN number value is an assigned tothe default VLAN？（）

A、VLAN 1003
B、VLAN 1
C、VLAN ON
D、VLAN A
E、VLAN 0

正确答案:B

第8题：

A Ezonexam switch is configured with all ports assigned to VLAN 2. In addition, all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?

A．The additions will create more collisions domains.

B．IP address utilization will be more efficient.

C．More bandwidth will be required than was needed previously.

D．An additional broadcast domain will be created.

E．The possibility that switching loops will occur will increase dramatically.

正确答案：D
解析：Explanation:
A VLAN is a group of hosts with a common set of requirements that communicate as if they were attached to the same wire, regardless of their physical location. A VLAN has the same attributes as a physical LAN, but it allows for end stations to be grouped together even if they are not located on the same LAN segment.

Networks that use the campus-wide or end-to-end VLANs logically segment a switched network based on the functions of an organization, project teams, or applications rather than on a physical or geographical basis. For example, all workstations and servers used by a particular workgroup can be connected to the same VLAN, regardless of their physical network connections or interaction with other workgroups.

Network reconfiguration can be done through software instead of physically relocating devices. Cisco recommends the use of local or geographic VLANs that segment the network based on IP subnets. Each wiring closet switch is on its own VLAN or subnet and traffic between each switch is routed by the router. The reasons for the Distribution Layer 3 switch and examples of a larger network using both the campus-wide and local VLAN models will be discussed later.

A VLAN can be thought of as a broadcast domain that exists within a defined set of switches. Ports on a switch can be grouped into VLANs in order to limit unicast, multicast, and broadcast traffic flooding. Flooded traffic originating from a particular VLAN is only flooded out ports belonging to that VLAN, including trunk ports, so a switch that connects to another switch will normally introduce an additional broadcast domain.

第9题：

Which two statements are true about voice VLANs？（）

A、Voice VLANs are only used when connecting an IP phone and a host to distinct switch ports
B、Access ports that are configured with voice VLANs will always trust the CoS that is received from IP phones
C、Access ports that are configured with voice VLANs may or may not override the CoS value that is received from an IP phone
D、Voice VLANs are configured using the switchport voice vlan vlan-ID interface configuration command
E、Voice VLANs provide a trunking interface between an IP phone and an access port on a switch to allow traffic from multiple devices that are connected to the port
F、Enabling Voice VLAN on a switch port will automatically configure the port to trust the incoming CoS markings

正确答案:C,D

第10题：

Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? （）

A、All ports will be in a state of discarding, learning, or forwarding.
B、Thirty VLANs have been configured on this switch.
C、The bridge priority is lower than the default value for spanning tree.
D、All interfaces that are shown are on shared media.
E、All designated ports are in a forwarding state.
F、The switch must be the root bridge for all VLANs on this switch.

正确答案:A,C,E

A switch is configured with all ports assigned to vlan 2 wit

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