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单选题
Company uses layer 3 switches in the Core of their network. Which method of Layer 3 switching uses a forwarding information base （FIB）？（）
A
Topology-based switching
B
Demand-based switching
C
Route caching
D
Flow-based switching
E
None of the other alternatives apply
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考题
Both bridges are switches are being used throughout the Ezonexam LAN. Which of the following statements are true regarding bridges and switches in this network?(Choose 3)A. Switches are primarily software based while bridges are hardware based.B. Switches usually have a higher number of ports than most bridges.C. Bridges are frequently faster than switches.D. Bridges define broadcast domains while switches define collision domains.E. Both bridges and switches forward Layer 2 broadcasts.F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.
考题
Routers perform the decision process that selects what path a packet takes. These （ ） layer devices participate it the collection and distribution of network-layer information, and perform Layer 3 switching based on the contents of the network layer （ ） of each packet. You can connect the routers directly by point-to-point （ ） or local-area networks, or you can connect them by LAN or WAN switches. These Layer 2 switches unfortunately do not have the capability to hold Layer 3 （ ） information or to select the path taken by a packet through analysis of its Layer 3 destination address. Thus, Layer 2 switches be involved in the Layer 3 packet （ ） decision process.A.application B. network C.physical D.link A.header B.connection C.protocol D.data A.medium B.links C.switches D.carriers A.network B.links C.protocol D.routing A.switching B.processing C.forwarding D.connecting
考题
To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus?()
A. to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 linkB. to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 linkC. to two core switches from redundant distribution switches connected with a Layer 2 linkD. to two core switches from redundant distribution switches connected with a Layer 3 linkE. to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO
考题
Which two practices will avoid Cisco Express Forwarding polarization?()
A. The core layer should use default Layer 3 hash information.B. The core layer should use default Layer 4 hash information.C. The distribution layer should use default Layer 3 hash information.D. The distribution layer should use default Layer 4 hash information.E. The core layer should use Layer 3 and Layer 4 information as input to the Cisco Expressing Forwarding hashing algorithm.F. The distribution layer should use Layer 3 and Layer 4 information as input into the Cisco Expressing Forwarding hashing algorithm.
考题
Refer to the exhibit. Which recommended practice is applicable?()
A. If no core layer is deployed, the design will be easier to scale.B. If no core layer is deployed, there will be fewer cabling requirements.C. If no core layer is deployed, the distribution switches should not be fully meshed.D. A dedicated campus core layer is not needed for connecting fewer than five buildings.E. A dedicated campus core layer should be deployed for connecting three or more buildings.
考题
Which of the following statements are true for routers but not true for Layer 3 Ethernet switches？（Choose all that apply.）（）A、May have Ethernet as well as non-Ethernet interfacesB、Traditionally used as a standalone device for inter-VLAN communicationC、Makes use of TCAMsD、Uses subinterfaces to define trunksE、Can use both Layer 2 and Layer 3 to make forwarding decisionsF、Allows the definition of Switched Virtual Interfaces（SVI）
考题
Which of the following is a characteristic of a data center core？（）A、 Server-to-server traffic always remains in the core layer.B、 The recommended practice is for the core infrastructure to be in Layer 3.C、 The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.D、 The Cisco Express Forwarding hashing algorithm is the default， based on the IP address andLayer 4 port.E、 Core layer should run BGP along with an IGP because iBGP has a lower administrativedistance than any IGP.
考题
Which of these recommendations is most appropriate for the core layer in the Cisco Campus Architecture？（）A、 Utilize Layer 3 switchingB、 Utilize software accelerated servicesC、 Aggregate end users and support a feature-rich environmentD、 Perform packet manipulation and filtering at the core layerE、 Use redundant point to-point Layer 2 interconnections when where is a link or node failure.
考题
To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus？（）A、 to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 linkB、 to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 linkC、 to two core switches from redundant distribution switches connected with Layer 2 linkD、 to two core switches from redundant distribution switches connected with Layer 3 linkE、 to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO
考题
Which of the following is a characteristic of a data center core?（）A、Server-to-server traffic always remains in the core layer.B、The recommended practice is for the core infrastructure to be in Layer 3.C、The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.D、The Cisco Express Forwarding hashing algorithm is the default, based on the IP address and Layer 4 port.E、Core layer should run BGP along with an IGP becauseiBGP has a lower administrative distance than any IGP.
考题
Company uses layer 3 switches in the Core of their network. Which method of Layer 3 switching uses a forwarding information base （FIB）？（）A、Topology-based switchingB、Demand-based switchingC、Route cachingD、Flow-based switchingE、None of the other alternatives apply
考题
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-idB、 switchportC、 switchport mode accessD、 no switchportE、 None of the other alternatives apply
考题
The core Company switches are configured to use 802.1Q trunks. Which three statements are correct with regard to the IEEE 802.1Q standard？（）A、 The IEEE 802.1Q frame format adds a 4 byte field to a Ethernet frameB、 The packet is encapsulated with a 26 byte header and a 4 byte FCSC、 The protocol uses point-to-multipoint connectivityD、 The protocol uses point-to-point connectivityE、 The IEEE 802.1Q frame uses multicast destination of 0x01-00-0c-00-00F、 The IEEE 802.1Q frame retains the original MAC destination address
考题
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.
考题
Which of the following statements are true regarding bridges and switches (Choose 3.)（）。A、Switches are primarily software based while bridges are hardware based.B、Both bridges and switches forward Layer 2 broadcasts.C、Bridges are frequently faster than switches.D、Switches have a higher number of ports than most bridges.E、Bridges define broadcast domains while switches define collision domains.F、Both bridges and switches make forwarding decisions based on Layer 2 addresses.
考题
You need to design the VLAN scheme for the Company network. Which two statements are true about best practices in VLAN design？（）A、Routing should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer.B、Routing should always be performed at the distribution layer.C、VLANs should be localized to a switch.D、VLANs should be localized to a single switch unlessvoice VLANs are being utilized.E、Routing should not be performed between VLANs located on separate switches.
考题
多选题The core Company switches are configured to use 802.1Q trunks. Which three statements are correct with regard to the IEEE 802.1Q standard？（）AThe IEEE 802.1Q frame format adds a 4 byte field to a Ethernet frameBThe packet is encapsulated with a 26 byte header and a 4 byte FCSCThe protocol uses point-to-multipoint connectivityDThe protocol uses point-to-point connectivityEThe IEEE 802.1Q frame uses multicast destination of 0x01-00-0c-00-00FThe IEEE 802.1Q frame retains the original MAC destination address
考题
单选题Distribution layer: This layer includes LAN-based routers and layer 3 switches . When is a first-hop redundancy protocol needed in the distribution layer?（）A
OSPF is not supported by the designB
HSRP is not supported by the designC
preempt tuning of the default gateway is neededD
the design implements Layer 3 between the access switch and the distribution switch
考题
单选题Which of the following is a characteristic of a data center core？（）A
Server-to-server traffic always remains in the core layer.B
The recommended practice is for the core infrastructure to be in Layer 3.C
The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.D
The Cisco Express Forwarding hashing algorithm is the default， based on the IP address andLayer 4 port.E
Core layer should run BGP along with an IGP because iBGP has a lower administrativedistance than any IGP.
考题
单选题Which of the following is a characteristic of a data center core?（）A
Server-to-server traffic always remains in the core layer.B
The recommended practice is for the core infrastructure to be in Layer 3.C
The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.D
The Cisco Express Forwarding hashing algorithm is the default, based on the IP address and Layer 4 port.E
Core layer should run BGP along with an IGP becauseiBGP has a lower administrative distance than any IGP.
考题
单选题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-idB
switchportC
switchport mode accessD
no switchportE
None of the other alternatives apply
考题
多选题You work as a network technician. Your boss is interested in the QoS technology in the context ofvideo traffic. What can be said of application of this technology in this type of network？（）AThe access layer is the initial point at which traffic enters the network. Traffic is marked （orremarked） at Layers 2 and 3 by the access switch as it enters the network， or is trusted that it isentering the network with the appropriate tagBNo traffic marking occurs at the core layer. Layer 2/3 QoS tags are trusted from distributionlayer switches and used to prioritize and queue the traffic as it traverses the coreCTraffic inbound from the access layer to the distribution layer can be trusted or reset dependingupon the ability of the access layer switches. Priority access into the core is provided based onLayer 3 QoS tagsDIP precedence， DSCP， QoS group， IP address， and ingress interface are Layer 2 characteristics that are set by the access layer as it passes traffic to the distribution layer. Thedistribution layer， once it has made a switching decision to the core layer， strips these offEMAC address， Multiprotocol Label Switching （MPLS）； the ATM cell loss priority （CLP） bit， theFrame Relay discard eligible （DE） bit， and ingress interface are established by the voicesubmodule （distribution layer） as traffic passes to the core layerFThe distribution layer inspects a frame to see if it has exceeded a predefined rate of trafficwithin a certain time frame， which is typically a fixed number internal to the switch. If a frame isdetermined to be in excess of the predefined rate limit， the CoS value can be marked up in a waythat results in the packet being dropped
考题
单选题Cisco Express Forwarding (CEF) is mainly used to increase packet switching speed, reducing the overhead and delays introduced by other routing techniques, increasing overall performance.Which of the following concerning CEF is recommended by Cisco?（）A
Use default Layer 4 hash in core.B
Use default Layer 3 hash in distribution.C
Use default Layer 4 hash in distribution.D
Use default Layer 3 hash in core and Layer 3 + Layer 4 hash in distribution layer.
考题
多选题Which three statements accurately describe layer 2 Ethernet switches？（）AMicrosegmentation decreases the number of collisions on the network.Bif a switch receives a frame for an unkown destination，it uses ARP to resolve the address.CSpanning Tree Protocol allows switches to automatically share vlan information.DIn a properly functioning network with redundant switched paths，each swiched aegment will contain oneroot bridge with all its ports in the forwarding state.All other switches in that broadcast domain will haveonly one root port.EEstablishing vlans increases the number of broadcast domains.FSwitches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3address information.
考题
多选题You need to design the VLAN scheme for the Company network. Which two statements are true about best practices in VLAN design？（）ARouting should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer.BRouting should always be performed at the distribution layer.CVLANs should be localized to a switch.DVLANs should be localized to a single switch unlessvoice VLANs are being utilized.ERouting should not be performed between VLANs located on separate switches.
考题
单选题Cisco Express Forwarding （CEF） is mainly used to increase packet switching speed， reducing theoverhead and delays introduced by other routing techniques， increasing overall performance.Which of the following concerning CEF is recommended by Cisco？（）A
Use default Layer 4 hash in core.B
Use default Layer 3 hash in distribution.C
Use default Layer 4 hash in distribution.D
Use default Layer 3 hash in core and Layer 3 + Layer 4 hash in distribution layer.
考题
单选题To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus？（）A
to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 linkB
to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 linkC
to two core switches from redundant distribution switches connected with Layer 2 linkD
to two core switches from redundant distribution switches connected with Layer 3 linkE
to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO
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