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Which statement about data center access layer design modes is correct？（）
A . The access layer is the first oversubscription point in a data center design.
B . When using a Layer 2 loop-free design， VLANs are extended into the aggregation layer.
C . When using a Layer 2 looped design， VLANs are not extended into the aggregation layer.
D . When using a Layer 3 design， stateful services requiring Layer 2 connectivity are provisionedfrom the aggregation layer.
E . The data center access layer provides the physical-level connections to the server resourcesand only operates at Layer 3.
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You need make configuration changes to an existing layer 3 switch in the Company network. On a multilayer Catalyst switch， which interface command is used to convert a Layer 3 interface to a Layer 2 interface？（）
A . switchport access vlan vlan-id
B . switchport
C . switchport mode access
D . no switchport
E . None of the other alternatives apply
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During voice implementation， which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）
A . allowed codecs
B . native VLAN
C . auxiliary VLAN
D . Cisco Unified Communications Manager IP address
E . RSTP
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You are the network consultant from Cisco.com. Please point out which Layer 2 access designs does not support VLAN extensions?（）
A . Flex Links
B . loop-free U
C . looped square
D . looped triangle
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You are the Cisco Network Designer in Cisco.com. Which two statements about Layer 3 access designs are correct?（）
A . Convergence time is fractionally slower than STP.
B . Broadcast and fault domains are increased.
C . IP address space is difficult to manage.
D . Fast uplink convergence is supported for failover and fallback.
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通常，一个Web服务可以分为4个逻辑层，分别为数据层（Data Layer）、数据访问层（Data Access Layer）、业务层（Business Layer）和监听者（Listener）。离客户端最近的是监听者，离客户最远的是（）。
A . 数据层（Data Layer）
B . 数据访问层（Data Access Layer）
C . 业务层（Business Layer）
D . 监听者（Listener）
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A customer is deploying a wireless core feature set using autonomous access points and requires Layer 2 roaming. What is a requirement when deploying this solution？（）
A . a minimum of one Cisco 4100 Series WLAN Controller
B . one WDS per subnet
C . a minimum of one Wireless LAN Services Module
D . all clients using Cisco Aironet Wireless LAN Adapter
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If an enterprise customer required A switch for their branch office access layer, which family of switches would the customer likely choose from?（）
A . Cisco SFS 3000/7000
B . Cisco Catalyst 2000 and 3000
C . Cisco Catalyst 4000 and 6000
D . Cisco Nexu
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NSAPI的全称为Network layer Service Access Point Identifier。（）
A . 正确
B . 错误
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Which set of commands is recommended to prevent the use of a hub in the access layer?（）
A . switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1
B . switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1
C . switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1
D . switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1
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Compared to the traditional Layer 2 and Layer 3 system, how does the Cisco Catalyst 6500 VSS 1440simplify the network? （）
A . provides loop-free technology
B . manages additional routing peers
C . provides HSRP/VRRP
D . manages two nodes and configuratio
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Which three Layer 2 access designs have all of their uplinks in an active state?（）
A . Flex Links
B . loop-free U
C . looped square
D . looped triangle
E . loop-free inverted U
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Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role?（）https://assets.asklib.com/images/image2/2018072317314615527.jpg
A . Switch3, port fa0/1
B . Switch3, port fa0/12
C . Switch4, port fa0/11
D . Switch4, port fa0/2
E . Switch3, port Gi0/1
F . Switch3, port Gi0/2
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Which command can be a router to verify the layer 3 path to a host?（）
A . traceroute address
B . tracert address
C . ssh address
D . telnet addre
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Which three Layer 2 access designs have all of their uplinks in an active state？（）
A . Flex Links
B . loop-free U
C . looped square
D . looped triangle
E . loop-free inverted U
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Why is STP required when VLANs span access layer switches？（）
A . to ensure a loop-free topology
B . to protect against user-side loops
C . in order to support business applications
D . because of the risk of lost connectivity without STP
E . for the most deterministic and highly available network topology
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You are the network consultant from Cisco.com. Please point out the reason that STP required when VLANs do not span access layer switches.（）
A . ensure a loop-free topology
B . protect against user-side loops
C . support business applications
D . risk of lost connectivity without STP
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When designing a converged network, which measures can be taken at the building access layer to help eliminate latency and ensure end-to-end quality of service can be maintained? （）
A . rate limit voice traffic
B . configure spanning-tree for fast link convergence
C . isolate voice traffic on separate VLANs
D . classify and mark traffic close to the source
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What does a Layer 2 switch use to decide where to forward a received frame?（）
A . source MAC address
B . source IP address
C . source switch port
D . destination IP address
E . destination port address
F . destination MAC addre
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Dreamweaver的文件（File）菜单命令中，Convert→Tables to layers表示？（）
A . A、插入一个XML文件来创建一个新文档
B . B、把模板中的可编辑区域作为一个XML文件
C . C、创建一个基于CSS的外部样式表单
D . D、创建一个新网页，将所有表格转换为层
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Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）
A . IGMP
B . IGMP snooping
C . PIM - DM
D . DVMRP
E . MOS PF
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If an enterprise customer required a switch for their branch office access layer, which family of switches would the customer likely choose from?（）
A . Cisco Catalyst 2000 and 3000
B . Cisco Nexus
C . Cisco Catalyst 4000 and 6000
D . Cisco SFS 3000/7000
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听力原文：F: What I can't make out you is why you are so keen on the Layer-de-la-Haye house. Why on earth should we choose, actually choose, to live out in a village, even if it is a popular village. You know that I would love to live in town and...
M: ...and be boxed in by a thousand other houses I suppose~ Surrounded by a thousand faceless neighbors. No, let' s go for the village. After all I'm the one who has to do all the traveling. Back and forth to London every day. And I would rather add a 15 minutes bus ride to the train ride than be--How does it go？--cabin' d, cribb' d confi' d.
F: That' s all very well...all very well to take that romantic attitude. You know... you think you can get out of everything...wriggle out of any argument...by quoting Shakespeare. What about my preferences？ You are being selfish you know.
M: Selfish？ Me？
F: Yes. Think of the children. Its seems to me that you are so carried away with the idea that your personal likes and dislikes are making you anything but practical.
What's the relations between the speakers？
A．Friends.
B．Colleagues.
C．Husband and wife.
D．Landlord and tenant.
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Together with the network layer,the transport layer is the heart of the protocol （）.The network layer provides end-to-end （） delivery using datagrams or virtual circuits.The transport layer builds on
A．connection
B． terminal
C． source
D． destination
