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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.
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更多 “ 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. ” 相关考题
考题
When is the BA Classifier engaged for identifying the forwarding class of traffic in a Juniper router?()
A.after a packet is identified by a multifield classifierB.after the traffic passes though a shaperC.prior to ingress policing of trafficD.while the packet is stored in the switching fabric of the router
考题
Which option correctly identifies the Cisco IOS switching methods in descending order from the fastest method to the slowest method？（）A、CEF， distributed CEF （dCEF）， fast switching， process switchingB、distributed CEF （dCEF）， CEF， fast switching， process switchingC、fast switching， process switching， distributed CEF （dCEF）， CEFD、process switching， fast switching， distributed CEF （dCEF）， CEFE、process switching， distributed CEF （dCEF）， CEF， fast switchingF、process switching， CEF， distributed CEF （dCEF）， fast switching
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Which three options are prerequisites to configuring Cisco AutoOoS？（）A、Cisco Express Forwarding （CEF） must be globally enabled.B、Prior to the enabling of the Cisco AutoOoS feature， the bandwidth command must be applied on all interfaces or subinterfaces.C、After the enabling of the Cisco AutoOoS feature， the bandwidth command must be applied on all interfaces or subinterfaces .D、OoS policies must be enabled on all interfaces that will participate in the AutoOoS configuration.E、An IP address must be configured on all low-bandwidth interfaces （768 kb/s or lower） that will participate in the AutoOoS configurationF、An IP address must be configured on all interfaces that will participate in the AutoOoS configuration
考题
Cisco Express Forwarding has been enabled on router TK1. With CEF， prefixes that require exception processing can be cached with one of which four special adjacencies？ （）A、KickB、DropC、ForwardD、NullE、DiscardF、GleanG、Express
考题
Whichof the following are valid modes of packet switching on most routers？（Choose all thatapply.）（）A、Cisco Express FonvardingB、FIB switchingC、Cache switchingD、Optimized switchingE、Process switchingF、Fast switching
考题
Using more than one label on a single packet is required in what context？（）A、MPLS TEB、MPLS VPNC、When CEF switching and Label switching is doneD、In all the above circumstances
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Which one of the following potential issues is eliminated by using split horizon？（）A、Joined horizonsB、Packet forwarding loopsC、cisco Express Forwarding load-balancing inconsistencyD、Asymmetric routing throughout the network
考题
Which statement is true about the internal link between the Routing Engine and the Packet-Forwarding Engine?（）A、It is only used for exception traffic.B、It is an FE link called fxp2.C、It is rate-limited to avoid DDOS attacks.D、It is only used to send the forwarding-table from the Routing Engine to the Packet-Forwarding Engine.
考题
Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches. As a network administrator, you are required to configure MPLS on Cisco IOS. In such a situation, which three of the following steps are necessary to take?（）A、Start LDP.B、Enable CEF switching.C、Configure conditional label advertising.D、Enable label switching on frame mode interfaces.E、disable IP TTL propagationF、configure conditional label advertising
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Which two statements about the Cisco Nexus 1000V VSM are true?（）A、It performs switching decisions and forwarding for the VEMB、It can be run on a virtual machineC、It can be used for remote VEM switching Iine cards
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Which three MPLS statements are true？（）A、Cisco Express Forwarding （CEF） must be enabled as a prerequisite to running MPLS on a Cisco router.B、Frame-mode MPLS inserts a 32-bit label between the Layer 3 and Layer 4 headers.C、MPLS is designed for use with frame-based Layer 2 encapsulation protocols such as Frame Relay， but is not supported by ATM because of ATM fixed-length cells.D、OSPF， EIGRP， IS-IS， RIP， and BGP can be used in the control plane.E、The control plane is responsible for forwarding packets.F、The two major components of MPLS include the control plane and the data plane.
考题
Which of these tables is used by an LSR to perform a forwarding lookup for a packet destined to an address within an RFC 4364 VPN？（）A、CEFB、FIBC、LFIBD、IGP
考题
For best packet switching performance with crypto, what is the recommend packet switching path in a Cisco Teleworker Router?（）A、Process SwitchingB、Silicon Switching C、Cisco Express Forwarding (CEF) SwitchingD、Autonomous Switching
考题
Which of the following is not a characteristic of Cisco Express Forwarding？（）A、The adjacency table is populated from a router’s ARP cacheB、CEF does not require the first packet of a data flow to be process switchedC、CEF maintains the Forward Information Base and the adjacency tableD、CEF can be enabled with the interface command ip cefE、The FIB is populated from a router’s IP routing tableF、On most router platforms CEF is enabled by default
考题
多选题Whichof the following are valid modes of packet switching on most routers？（Choose all thatapply.）（）ACisco Express FonvardingBFIB switchingCCache switchingDOptimized switchingEProcess switchingFFast switching
考题
多选题Which three MPLS statements are true？（）ACisco Express Forwarding （CEF） must be enabled as a prerequisite to running MPLS on a Cisco router.BFrame-mode MPLS inserts a 32-bit label between the Layer 3 and Layer 4 headers.CMPLS is designed for use with frame-based Layer 2 encapsulation protocols such as Frame Relay， but is not supported by ATM because of ATM fixed-length cells.DOSPF， EIGRP， IS-IS， RIP， and BGP can be used in the control plane.EThe control plane is responsible for forwarding packets.FThe two major components of MPLS include the control plane and the data plane.
考题
单选题To increase the distance to the vessel ahead by reducing one’s own speed means（）.A
fall backB
keep low speedC
running afterD
drop back
考题
单选题Which option correctly identifies the Cisco IOS switching methods in descending order from the fastest method to the slowest method？（）A
CEF， distributed CEF （dCEF）， fast switching， process switchingB
distributed CEF （dCEF）， CEF， fast switching， process switchingC
fast switching， process switching， distributed CEF （dCEF）， CEFD
process switching， fast switching， distributed CEF （dCEF）， CEFE
process switching， distributed CEF （dCEF）， CEF， fast switchingF
process switching， CEF， distributed CEF （dCEF）， fast switching
考题
多选题Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches. As a network administrator, you are required to configure MPLS on Cisco IOS. In such a situation, which three of the following steps are necessary to take?（）AStart LDP.BEnable CEF switching.CConfigure conditional label advertising.DEnable label switching on frame mode interfaces.Edisable IP TTL propagationFconfigure conditional label advertising
考题
单选题Which statement is true about the internal link between the Routing Engine and the Packet-Forwarding Engine？（）A
It is only used for exception traffic.B
It is an FE link called fxp2.C
It is rate-limited to avoid DDOS attacks.D
It is only used to send the forwarding-table from the Routing Engine to the Packet-Forwarding Engine.
考题
多选题Cisco Express Forwarding has been enabled on router TK1. With CEF， prefixes that require exception processing can be cached with one of which four special adjacencies？ （）AKickBDropCForwardDNullEDiscardFGleanGExpress
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
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Which of the following is not a characteristic of Cisco Express Forwarding？（）A
The adjacency table is populated from a router’s ARP cacheB
CEF does not require the first packet of a data flow to be process switchedC
CEF maintains the Forward Information Base and the adjacency tableD
CEF can be enabled with the interface command ip cefE
The FIB is populated from a router’s IP routing tableF
On most router platforms CEF is enabled by default
考题
单选题When is the BA Classifier engaged for identifying the forwarding class of traffic in a Juniper router?（）A
after a packet is identified by a multifield classifierB
after the traffic passes though a shaperC
prior to ingress policing of trafficD
while the packet is stored in the switching fabric of the router
考题
单选题For best packet switching performance with crypto, what is the recommend packet switching path in a Cisco Teleworker Router?（）A
Process SwitchingB
Silicon Switching C
Cisco Express Forwarding (CEF) SwitchingD
Autonomous Switching
考题
多选题Which two statements about the Cisco Nexus 1000V VSM are true?（）AIt performs switching decisions and forwarding for the VEMBIt can be run on a virtual machineCIt can be used for remote VEM switching Iine cards
考题
单选题Using more than one label on a single packet is required in what context？（）A
MPLS TEB
MPLS VPNC
When CEF switching and Label switching is doneD
In all the above circumstances
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