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Free test Cisco CCIE 400-151 Exam questions and Answers
QUESTION 1
Which goal of peer-gateway in vPC is true?
A. Use the same bridge ID when sending BPDUs from switches in s vPC pair.
B. Configure the MAC address of the vPC peer as a gateway MAC.
C. Transmit BPDUs from the secondary and primary vPC switch.
D. Act as a single router when peering dynamic routing protocols over a vPC.
Correct Answer: D
QUESTION 2
Which three benefits do VXLANs offer compared to VLANs (Choose three.)
A. It provides a solution toextend Layer 2 segments over a shared Layer 3 routed network.
B. It provides better utilization of available network paths in the underlay infrastructure.
C. VXLAN uses a 16-bit VNIS to overcome the 4094 VLAN scale limitation.
D. VXLAN uses a 24-bit VNID to overcome the 4094 VLAN scale limitation.
E. It provides a solution to extend Layer 2 segments over a single Layer 2 VLAN.
F. It provides better utilization of available network paths in the overlay infrastructure.
Correct Answer: ABD
VXLANOverview As its name indicates, VXLAN is designed to provide the same Ethernet Layer 2 network services as
VLAN does today, but with greater extensibility and flexibility. Compared to VLAN, VXLAN offers the following benefits:
Flexible placement of multitenant segments throughout the data center: It provides a solution to extend Layer 2
segments over the underlying shared network infrastructure so that tenant workload canbe placed across physical pods
in the
data center.
Higher scalability to addressmore Layer 2 segments: VLANs use a 12-bit VLAN ID to address Layer 2 segments, which
results in limiting scalability of only 4094 VLANs. VXLAN uses a 24-bit segment ID known as the VXLAN network
identifier
(VNID), which enables up to 16 million VXLAN segments to coexist in the same administrative domain.
Better utilization of available network paths in the underlying infrastructure: VLAN uses the Spanning Tree Protocol for
loop prevention, which ends up not using half of the network links in a network by blocking redundant paths. In contrast,
VXLAN packets are transferred through the underlying network based on its Layer 3 header and can take complete
advantage of Layer 3routing, equal-cost multipath (ECMP) routing, and link aggregation protocols to useall available
paths.
VXLAN Encapsulation and Packet Format VXLAN is a Layer 2 overlay scheme over a Layer 3 network. It uses MAC
Address-in-User Datagram Protocol (MAC-in-UDP) encapsulation to provide a means to extend Layer 2 segments
across
the data center network. VXLAN is a solution to support a flexible, large-scale multitenant environment over a shared
common physical infrastructure. The transport protocol over the physical data center network is IP plus UDP.
QUESTION 3
Which two of the following options are true about OpenStack Cinder? (Choose two.)
A. Attached to multiple instances simultaneously.
B. Data Storage
C. Persistent storage
D. Can only be attached to one instance at a time.
E. Ephemeral storage.
Correct Answer: AC
QUESTION 4
Drag and drop the term of the Cisco Prime Service Catalog from the left column onto the correct definition on the right.
Select and Place: 
Correct Answer:
QUESTION 5
Drag and drop the objects of the ACI policy model from left onto the correct definition on right.
Select and Place:
Correct Answer:
QUESTION 6
Which two guidelines apply to private VLAN configuration when you are running FabricPath? (Choose two.)
A. On the F-Series modules, user-configured static MAC addresses are programmed on all forwarding engines that
have ports in that VLAN.
B. The system does support hierarchical static MAC addresses.
C. FabricPath ports can be put into a private VLAN.
D. All VLANs in a private VLAN must be in the same VLAN mode; either CE or FabricPath.
Correct Answer: AD
QUESTION 7
Which two descriptions of the Cisco 7000 RISE Technology are true? (Choose two.)
A. RISE enables remote inspection of control plane traffic to address security concerns.
B. RISE can provide ADC offload freeing resources in the ADC.
C. RISE enables remote inspection of data plane traffic to address security concerns
D. RISE enables a physical appliance to appear as a service module in the Cisco Nexis 7000 chassis
E. RISE can be utilized to provide management capabilities for non-Cisco routers.
Correct Answer: DE
QUESTION 8
After you deploy a Layer 4 ?Layer 7 service graph in Cisco ACI, where do you modify the parameters of the Layer 4
?Layer 7 device(s)?
A. under the Service Graph Template
B. under the Provider EPG > L4-L7 Service Parameters
C. under the Consumer EPG > L4-L7 Service Parameters
D. under the Deployed Graph Instance
Correct Answer: A
QUESTION 9
While doing service insertion with vAsA with route peering, which two parts must be configured? (Choose two.)
A. The chassis must be specified when the L4-L7 device is created.
B. The path for interfaces must be specified when the L4-L7 device is created.
C. The VM name must be specified when the L4-L7 device is created.
D. The route peering profile must be specified when the L4-L7 Service Graph template is created
Correct Answer: BD
QUESTION 10
Which two statements about CFS are true? (Choose two.)
A. CFS distributes the local NTP configuration to masteronly which then forwards to all devices in network.
B. After enabling CFS, a network-wide lock is applied to NTP whenever an NTP configuration is started and released
once after the change has been committed or discarded.
C. If CFS is used to distribute NTP, all devices in the network must have the different VRFs configured then as used for
NTP.
D. You must manually distribute NTP authentication keys on the NTP server and Cisco NX-OS devices across the
network.
E. CFS requires a license to be installed before it can be used to distribute NTP.
Correct Answer: BD
Cisco Fabric Services (CFS) distributes the local NTP configuration to all Cisco devices in the network. After enabling
CFS on your device, a network-wide lock is applied to NTP whenever an NTP configuration is started. After making the
NTP configuration changes, you can discard or commit them. In either case, the CFS lock is then released from the
NTP application.