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Q1. You are designing a multisite VPN solution for a customer and you are concerned with the additional overhead of point-to-point tunnels and the associated overlay routing with DMVPN. How does a GDOI-based VPN eliminate the additional tunnel and routing overhead found in DMVPN?
A. The GDOI-based VPN requires overlaying a secondary routing infrastructure through the tunnels.
B. In a GDOI-based VPN, all group members share a common security association.
C. The GDOI-based VPN requires the provisioning of a complex connectivity mesh.
D. The GDOI-based VPN leverages the routing protocol to find its peer for tunnel setup.
Answer: B
Q2. You are designing a network to support data, voice and video. Which two main factors will you address to improve network convergence? (Choose two.)
A. event propagation delay
B. failure detection delay
C. forwarding engine update delay
D. routing table recalculation delay
Answer: BD
Q3. Which mechanism provides a Layer 2 fault isolation between data centers?
A. TRILL
B. LISP
C. advanced VPLS
D. OTV
E. fabric path
Answer: D
Q4. You are designing an optical network. Your goal is to ensure that your design contains the highest degree of resiliency. In which two ways will 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 takes linear and nonlinear optical impairment calculation into account
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
Answer: AB
Q5. While reviewing an existing network design, you are discussing the characteristics of different STP versions. Which protocol minimizes unicast flooding during TCN in a Layer 2 switched network with many VLANs?
A. STP
B. MST
C. PVRSTP
D. PVSTP+
Answer: D
Q6. Refer to the exhibit.
You are designing a loop-free hierarchical VPLS service. Which two design considerations should be implemented for the pseudowires between the N-PE and U-PE routers? (Choose two.)
A. Disable split horizon toward the N-PE routers.
B. Disable split horizon toward the U-PE router.
C. Enable split horizon toward the U-PE router.
D. Enable split horizon toward the N-PE routers.
E. Disable MAC learning on the U-PE route.
F. Disable MAC learning on the N-PE routers.
Answer: BD
Q7. What is a key benefit of a layered network design?
A. cost savings
B. increased security
C. increased flexibility
D. decreased broadcast
Answer: C
Q8. You are designing a network using multipoint GRE tunnels and need to be able to detect when connectivity between the GRE tunnel endpoints is broken. Which statement is true about configuring keepalives for multipoint GRE tunnels?
A. The keepalive timer values on the routers must have the same value.
B. Both routers must support GRE tunnel keepalives.
C. No configuration is required to detect when connectivity is broken between the GRE tunnel endpoints.
D. GRE tunnel keepalives will not detect when connectivity is broken between the GRE tunnel endpoints.
Answer: D
Q9. Currently a service provider provides IPv4 traceroute services between MPLS PE routers. The provider wants to implement IPv6 with MPLS 6PE/6VPE and then provide parallel IPv6 traceroute services between MPLS PE routers. Which two design solutions provide this service? (Choose two.)
A. The P routers must support ICMPv6.
B. The PE routers must support ICMPv6.
C. The P routers must support full IPv6.
D. The PE routers must support full IPv6.
Answer: BD
Q10. A Tier-3 Service Provider is evolving into a Tier-2 Service Provider due to the amount of Enterprise business it is receiving. The network engineers are re-evaluating their IP/MPLS design considerations in order to support duplicate/overlapping IP addressing from their Enterprise customers within each Layer 3 VPN. Which of the following would need to be reviewed to ensure stability in their network?
A. Assigning unique Route Target ID's
B. Assigning unique Route Distinguishers
C. Assigning unique IP address space for the Enterprise NAT/Firewalls
D. Assigning unique VRF ID's to each Layer 3 VPN
Answer: B
