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Q1. A junior engineer is implementing one of your optical designs and asks about CWDM (Coarse Wavelength Division Multiplexing). Which two features describe CWDM? (Choose two.)
A. typically used over long distances, but requires optical amplification
B. allows up to 32 optical carriers to be multiplexed onto a single fiber
C. shares the same transmission window as DWDM
D. uses the 850-nm band
E. Passive CWDM devices require no electrical power.
Answer: CE
Q2. What is a design aspect regarding multicast transport for MPLS Layer 3 VPNs using the Rosen Draft implementation?
A. LDP is the multicast control plane protocol.
B. Multicast traffic is forwarded over GRE tunnels.
C. Multicast traffic is forwarded over LDP or RSVP signaled LSPs.
D. Using the MDT SAFI in BGP ensures that PIM can be disabled in the core.
Answer: B
Q3. You are asked to design a large campus network that will be using multicast for data transport. Which feature should be enabled at the Layer 2 access edge for host-only ports?
A. PortFast
B. BPDU guard
C. PIM-SM
D. PIM query interval
Answer: A
Q4. Refer to the exhibit.
Service Provider A and Service Provider B have agreed to a strategic interconnect relationship that will allow them access into each other's geographies by using an inter-AS eBGP VPNv4 multihop between route reflectors. Which two options will accomplish this scenario? (Choose two.)
A. RR 1 and RR 2 peer using multihop eBGP VPNv4 to exchange prefixes.
B. ASBR 1 and ASBR 2 act as inline route reflectors that set themselves as the next-hop.
C. An LSP is formed between ASBR 1 and ASBR 2 using eBGP IPv4.
D. An LSP is formed between ASBR 1 and ASBR 2 using eBGP VPNv4.
E. RR 1 and RR 2 peer using multihop eBGP IPv4 to exchange prefixes.
Answer: AC
Q5. Refer to the exhibit.
You are asked to design this OSPF network to converge within 60 ms for unicast packets after a topology change due to a single link failure. Which technology can be enabled while conforming to the design requirements?
A. Loop-Free Alternates
B. BFD
C. IGP neighbor timer tuning
D. IGP SPF timer tuning
E. RSVP-TE Fast Reroute
Answer: A
Q6. A company is planning to deploy high-availability cluster support for their servers in a collapsed core data center design. Which issue should be a concern with this design?
A. NIC teaming
B. MAC address aging
C. Layer 3 domain sizing
D. Layer 2 domain sizing
Answer: D
Q7. 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
Q8. You are designing a wireless LAN with the following components:
High-density indoor access point deployment
2.4-GHz and 5-GHz radios
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.
Answer: A
Q9. Refer to the exhibit.
A new IPv4 multicast-based video-streaming service is being provisioned. During the design-validation tests, you realize that the link between the two buildings is carrying multicast traffic even when there are no receivers connected to the switch in Building B and despite IGMP snooping being enabled on both Layer 2 switches and IGMPv2 runs on the hosts. Which design change will prevent the multicast traffic from being unnecessarily flooded throughout the campus network?
A. Enable PIM snooping on both Layer 2 switches.
B. Enable multicast storm control on the link between Switch 1 and Switch 2.
C. Use static Layer 2 MAC forwarding entries on Switch 1.
D. Change the IPv4 multicast group address such that it excludes the usage of link-local MAC addresses.
E. Ensure that Switch 1 is an IGMP querier.
Answer: D
Q10. Refer to the exhibit.
In the DWDM network, a ring topology carries multiple services between two sites. Which option describes the employed protection design?
A. Y-cable protection
B. Splitter protection
C. Client protection
D. UDLD
E. FEC protection
Answer: C
Q11. 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
Q12. Your company will attach to a new Gigabit Ethernet-based wide area network from the local service provider for remote connectivity. Each connection will have a 150 Mb/s committed information rate. For the design of this new service, which QoS mechanism should be used to ensure low packet loss toward the service provider network?
A. shaping
B. policing
C. CBWFQ
D. RED
Answer: A
Q13. Your company plans to implement an Internet gateway router that is performing NAT. This same gateway will be terminating various IPsec tunnels to other remote sites. Which
address type isappropriate for the ACL that will govern the sources of traffic entering the tunnel in the inside interface?
A. inside local
B. inside global
C. outside local
D. outside global
Answer: B
Q14. When designing a network, which two security features should be added to the design to protect hosts from potential IPv6 neighbor discovery denial of service attacks at the access layer? (Choose two.)
A. SEND
B. RA Guard
C. IKEv2
D. IPsec
E. DMVPNv6
Answer: AB
Q15. You are working on a network design for Customer A. This design should consider fast convergence features, and it was agreed that BFD should be used for faster link-transition detection. Which three options apply to the use of the echo function in BFD? (Choose three.)
A. It can be used with asynchronous mode.
B. BFD control packets are not required.
C. It can be enabled individually in each direction.
D. It has the advantage of testing the forwarding path on the remote system.
E. The rate of periodic transmission of BFD control packets should be increased.
Answer: ACD