Ensurepass

QUESTION 11

You are designing a wireless LAN with the following components:

 

clip_image002High-density indoor access point deployment

clip_image002[1]2.4-GHz and 5-GHz radios

clip_image002[2]802.11a, 802.11g, and 802.11n mode wireless LAN clients

 

Site survey results show negligible foreign WiFi and non-WiFi interference. What is the best method to decrease duty cycle (radio frequency utilization) and increase overall wireless LAN client performance for this design?

 

A.

Disable all data rates below 12 Mb/s on all access points.

B.

Decrease radio transmit power on all access points that report a high duty cycle.

C.

Increase radio transmit

power on all access points that report a high duty cycle.

D.

Disable all data rates above 12 Mb/s on all access points.

E.

Increase radio transmit power on all access points.

 

Correct Answer: A

 

 

QUESTION 12

You are a network designer and are responsible for ensuring that the network you design is secure. How do you plan to prevent infected devices on your network from sourcing random DDoS attacks using forged source addresses?

 

A.

ACL-based forwarding

B.

ACL filtering by destination

C.

Unicast RPF loose mode

D.

Unicast RPF strict mode

 

Correct Answer: D

 

 

 

 

 

QUESTION 13

Refer to the exhibit. You are designing a spanning-tree network for a small campus. Which two of these options would result in a trouble-free spanning-tree network design? (Choose two.)

 

clip_image004

 

A.

Convert all ports to trunk ports, prune off the VLANs that you do not require, and minimize the number of blocking ports.

B.

Introduce Layer 3 VLANs (SVIs) and prune off the VLANs that you do not require.

C.

Convert all the ports to trunk and enable BackboneFast.

D.

Convert all the ports to trunk and enable UplinkFast between all the links.

 

Correct Answer: AB

 

 

QUESTION 14

You are designing the QoS features for a large enterprise network that includes DMVPN. When would you need to configure QoS preclassify?

 

A.

when you are marking packets with the DSCP bits

B.

when you are marking packets with the TOS bits

C.

when your service provider requires the DSCP bits be set

D.

when the QoS policy cannot be based on DSCP ToS bits

 

Correct Answer: D

 

 

QUESTION 15

A green data center is being deployed and a design requirement is to be able to readily scale server virtualization. Which IETF standard technology can provide this requirement?

 

A.

Transparent Interconnection of Lots of Links

B.

fabric path

C.

data center bridging

D.

unified fabric

 

Correct Answer: A

 

 

QUESTION 16

You are working on a network design plan for a company with approximately 2000 sites. The sites will be connected using the public Internet. You plan to use private IP addressing in the network design, which will be routed without NAT through an encrypted WAN network. Some sites will be connected to the Internet with dynamic public IP addresses, and these addresses may change occasionally. Which VPN solution will support these design requirements?

 

A.

GET VPN must be used, because DMVPN does not scale to 2000 sites.

B.

DMVPN must be used, because GET VPN does not scale to 2000 sites.

C.

GET VPN must be used, because private IP addresses cannot be transferred with DMVPN through the public Internet.

D.

DMVPN must be used, because private IP addresses cannot be transferred with GET VPN through the public Internet.

E.

GET VPN must be used, because DMVPN does not support dynamic IP addresses for some sites.

F.

DMVPN must be used, because GET VPN does not support dynamic IP addresses for some sites.

 

Correct Answer: D

 

 

QUESTION 17

Your enterprise customer has asked where they should deploy flow monitoring in their network to monitor traffic between branch offices. What is your design recommendation?

 

A.

at the edge of the network so that user traffic will be seen

B.

at the central site, because all traffic from the remotes will be seen there.

C.

in the core, because all traffic will be seen there

D.

in the data center, because all user traffic will be seen there

 

Correct Answer: B

 

 

QUESTION 18

Voice traffic between two campus enterprise networks is growing. The network designers decide to add a second 10-Mb Metro Ethernet service parallel to their original 10-Mb service in order to provide more bandwidth and diversity. The QoS profile will be the same on the new 10-Mb service due to the voice stability on the first Metro Ethernet link. When the second link is added to the OSPF domain, which traffic design consideration would have the most impact on the voice traffic when both links are active?

 

A.

per-destination IP address basis

B.

per-flow basis

C.

per-packet basis

D.

per-source IP address basis

 

Correct Answer: C

QUESTION 19

If a network design must support rapid convergence on half-duplex interfaces, which IEEE 802.1w capability should be used?

 

A.

root guard

B.

proposal-agreement handshake

C.

loop guard

D.

UplinkFast

 

Correct Answer: B

 

 

QUESTION 20

When developing an MVPN design, which performance and scalability consideration must be taken into account?

 

A.

CE end-to-end PIM adjacency establishment

B.

multicast data sent to all PE routers on the default MDT

C.

RP placement in the multicast VRF

D.

RP placement in the customer network

 

Correct Answer: B

 

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