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Cisco Certified Design Expert Practical Sample Questions:

1. Which reason prevents a designer from using a GDOI-based VPN to secure traffic that traverses the Internet?

A) GDOI is less secure than traditional IPsec.
B) Network address translation functions interfere with tunnel header preservation.
C) Enterprise host IP addresses are typically not routable.
D) The use of public addresses is not supported with GDOI.

2. 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) DMVPN must be used, because private IP addresses cannot be transferred with GET VPN through the public Internet.
B) DMVPN must be used, because GET VPN does not support dynamic IP addresses for some sites.
C) DMVPN must be used, because GET VPN does not scale to 2000 sites.
D) GET VPN must be used, because DMVPN does not support dynamic IP addresses for some sites.
E) GET VPN must be used, because private IP addresses cannot be transferred with DMVPN through the public Internet.
F) GET VPN must be used, because DMVPN does not scale to 2000 sites.

3. You are designing an optical network. Your goal is to ensure that your design contains the highest degree of resiliency. In which two ways should you leverage a wavelength-switched optical network solution in your network design? (Choose two.)

A) a wavelength-switched optical network assigns routing and wavelength information
B) a wavelength-switched optical network provides fault tolerance for single failures only
C) a wavelength-switched optical network guarantees restoration based strictly on the shortest path available
D) a wavelength-switched optical network eliminates the need for dispersion compensating units in a network
E) a wavelength-switched optical network takes linear and nonlinear optical impairment calculation into account

4. As part of network design, two geographically separated data centers must be interconnected using Ethernet-over-MPLS pseudowire. The link between the sites is stable, the topology has no apparent loops, and the root bridges for the respective VLANs are stable and unchanging. Which aspect must be the part of the design to mitigate the risk of connectivity issues between the data centers?

A) Ensure that the spanning tree diameter for one or more VLANs is not too large.
B) Enable 802.1d on one data center, and 802.1w on the other.
C) Enable root guard on the link between the data centers.
D) Enable UDLD on the link between the data centers.

5. Refer to the exhibit.

You are a network designer who is given these design requirements:
Multicast services must be provided for Layer 3 VPN customers
The same forwarding technology must be used as Layer 3 VPN unicast packets Replication of multicast traffic is not allowed on the ingress PE Which multicast VPN technology conforms to the design requirements?

A) Rosen Draft using LDP
B) Multipoint-to-point LDP
C) MSDP
D) MLDP VPN

Solutions: