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Q1. When designing a WAN that will be carrying real-time traffic, what are two important reasons to consider serialization delay? (Choose two.)
A. Serialization delays are variable because they depend on the line rate of the interface and on the type of the packet being serialized.
B. Serialization delay depends not only on the line rate of the interface but also on the size of the packet.
C. Serialization delays are invariable because they depend only on the line rate of the interface.
D. Serialization delays are variable because they depend only on the size of the packet being serialized.
E. Serialization delay is the time required to transmit the packet on the physical media.
Answer: BE
Q2. 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
Answer: B
Q3. The network administrator of a branch office network has decided to deploy Unicast RPF at the access layer. He insists that the design must guarantee that all the packets arriving on the router interfaces are assigned to the same interface subnet.
Which mode of Unicast RPF would you recommend as the lead network designer?
A. uRPF strict mode
B. uRPF loose mode
C. uRPF VRF mode
D. RPF feasible mode
Answer: A
Q4. Refer to the exhibit.
You are designing an IPv4 unicast Layer 3 VPN load-balancing solution. Which L3VPN feature needs to be configured on the PE routers to support the design requirement?
A. nonmatching route distinguishers
B. matching route target values
C. disable split horizon on PE2 and PE3
D. matching route distinguishers
Answer: A
Q5. You are designing a large Frame Relay WAN for a customer. The routing protocol is OSPF. What is the effect on the routing table if the WAN interfaces are configured as point-to-multipoint?
A. Only a route for the DR will be present in the routing table.
B. Configuring point-to-multipoint has no effect on the routing table. The route that is configured with the area command will be seen in the routing table.
C. Multipoint interfaces dynamically add the network of the connected interface.
D. Multipoint interfaces dynamically add a /32 route for each neighbor in the WAN.
Answer: D
Q6. What is a key role for the access layer in a hierarchical network design?
A. The access layer provides a security, QoS, and policy trust boundary.
B. The access layer provides an aggregation point for services and applications.
C. The access layer serves as a distribution point for services and applications.
D. The access layer can be used to aggregate remote users.
Answer: A
Q7. A designer is working with a large bank to redesign their network. The designer wants to minimize complaints regarding slow application response times across the WAN. It is suspected that currently traffic is not being classified and marked correctly somewhere in the network. Which tool should the designer recommend to validate quality of service mappings and use?
A. SNMP
B. IPFIX
C. IP SLA
D. protocol analyzer
E. NBAR
Answer: B
Q8. You are designing a solution to eliminate the risk of high CPU utilization on a core network composed of CRS-1 devices. Which option would eliminate the risk of high CPU utilization across the network?
A. Use Local Packet Transport Services (LPTS) to manage hardware SNMP flow rate.
B. Use the in-band control plane policy feature to reduce the SNMP flow rate.
C. Use the control plane policy feature and reduce SNMP flow rate.
D. Use control-plane management-plane in-band and reduce the SNMP flow rate.
E. Use the control-plane management-plane out-of-band feature to reduce the SNMP flow rate.
Answer: A
Q9. 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
Q10. A metro service provider is planning Resilient Ethernet Protocol for his backbone. Which two aspects must be considered before the network design is finalized? (Choose two.)
A. Two Resilient Ethernet Protocol segments can be connected redundantly at two points. One connection will be blocked, using the Spanning Tree Protocol defined in IEEE 802.1D.
B. UniDirectional Link Detection Protocol can be enabled on Resilient Ethernet Protocol interfaces to detect unidirectional failures.
C. The guaranteed convergence recovery time is less than 50 ms for the local segment.
D. A Resilient Ethernet Protocol segment is limited to a maximum of seven devices.
E. VLAN load balancing for optimal bandwidth usage is supported in any Resilient Ethernet Protocol segment.
Answer: BE
Q11. During a corporate merger, a network designer is asked for a solution that will provide connectivity between the two enterprise networks. The solution must have the ability to support video sessions so that the CEO can message merger activities to the employees. The designer decides to consider multicast as a transport with MSDP to provide redundancy. Which transport feature does the network designer need to apply to the interconnecting firewall to ensure that Source-Active messages between the MSDP peers can be sent in both enterprise networks?
A. unicast over a UDP connection
B. multicast over a UDP connection
C. unicast over a TCP connection
D. multicast over a TCP connection
Answer: C
Q12. 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
Q13. You need to redesign your NMS system so that it can collect information without causing adverse effects in the network, such as high CPU utilization on network devices and network instability. Which two options will minimize the impact of the trusted NMS polling your network in this situation? (Choose two.)
A. Implement SNMP community restrictions that are associated with an ACL.
B. Unload unused MIBs from the network devices.
C. Prevent polling of large tables through the use of SNMP OID restrictions.
D. Disable unused OIDs and MIBs on the NMS systems.
Answer: CD
Q14. A many-to-many enterprise messaging application is using multicast as a transport mechanism. As part of the network design for this application, which multicast address should be used, according to best practices outlined in RFC 2365?
A. 224.0.0.60
B. 232.192.0.60
C. 239.128.0.60
D. 239.193.0.60
Answer: D
Q15. In an MPLS-VPN environment, what is the effect of configuring an identical set of route targets for a particular VRF, but then configuring nonidentical route distinguisher across multiple PE devices?
A. The routes will be correctly handled by the control plane, but there will be instances where routes take up twice as much memory.
B. The routes will propagate to the remote PE, but the PE will never install them in its forwarding table.
C. The routes will be rejected by the remote PE because they have a different RD than its routes.
D. The routes will not even be sent to any remote PE with a different RD.
Answer: A