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QUESTION 11
Which two flexible service mapping features that are used on the ES40 line card can classify traffic into different service instances, in order to consume fewer VLANs? (Choose two.)
A. CoS
B. DSCP
C. IP precedence
D. MPLS experimental bit
E. ToS
F. EtherType
Answer: AF
Explanation:
http://www.cisco.com/c/en/us/td/docs/routers/7600/install_config/ES40_config_guide/es40_sw_config/es40_chap7.html#pgfId-1500091
QUESTION 12
Which three statements about bidirectional PIM are true? (Choose three)
A. Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes multiple
paths in a redundant network topology.
B. It does not require any traffic signaling in the protocol
C. Membership to a bidirectional group is signaled using explicit Join messages.
D. It maintains source-specific forwarding state.
E. It reduces memory, bandwidth, and CPU requirements
Answer: BCE
QUESTION 13
A network architect is tasked to design and deploy multicast in a service provider core.
There is a requirement to have two PIM RP routers for PIM-SM distribute mode.
What can the network architect do to satisfy this requirement?
A. Set two RPs with same priority.
B. Set two RPs, one with high priority and the other with low priority.
C. Set one RP as the main RP and another as a backup RP.
D. Set the RP-BSR method with one high-priority RP and one low-priority RP.
Answer: D
QUESTION 14
In relation to MPLS Multicast VPN, which three statements about multicast distribution (MDT) groups are true? (Choose three)
A. Default MDT groups are used for PIM control traffic, low-bandwidth sources, and flooding of sparse
mode traffic.
B. MDTs are built in customer networks
C. Data MDT groups are used for high-bandwidth sources to reduce replication to uninterested PEs.
D. MDTs are built in provider networks
E. The number of MDTs depends on PIM modes of MDT groups.
Answer: CDE
Explanation:
Tree created by the MVPN configuration. The Default-MDT is used for customer Control Plane and low rate Data Plane traffic. It connects all of the PE routers with MVRFs in a particular MD and one will exist in every MD whether there is any active source in the respective customer network.
QUESTION 15
What is the role of Forwarding Equivalence Class (FEC) in MPLS?
A. FEC determines how to establish an LSP path.
B. FEC determines how IP packets are forwarded in MPLS LSP.
C. FEC determines how MPLS labels are stacked in LSP.
D. FEC determines how a group of IP packets are mapped to an LSP.
Answer: D
QUESTION 16
In optical channel transport unit overhead (OTU OH), what are general communication channels 1 and 2 (GCC1/GCC2) used for?
A. for trail trace identification
B. as the backward defect indicator
C. to transmit information between OTU termination points
D. to extend command and management functions over several frames
E. General communication channels 1 and 2 (GCC1/GCC2) do not belong to OTU OH.
Answer: E
Explanation:
OTU overhead:
The OTU overhead consists of three bytes for section monitoring (SM), a two-byte general communications channel (GCC0), and two bytes reserved for future international standardization.
QUESTION 17
Which option describes the incorrect usage of the Label Distribution method?
A. MP-BGP is used for label distribution for VPN customer routes.
B. LDP is primarily used in internal networks of MPLS-VPN providers.
C. MP-BGP is used for label distribution in MPLS Traffic Engineered networks.
D. Directed LDP is used for label distribution in L2-VPN Attachement Circuits.
Answer: C
QUESTION 18
RIPv2 differs from RIPv1 in which three things? (Choose three).
A. it uses multicast address 224.0.0.10, instead of broadcast.
B. it uses multicast address 224.0.0.9, instead of broadcast.
C. it can use either multicast or broadcast addresses,instead of just broadcast.
D. it sends incremental updates,instead of periodic updates.
E. it is classless, instead of classfull
F. it supports authentication, and RIPv1 does not
Answer: BEF
QUESTION 19
Which option propagates SRLG membership information to the network?
A. BGP attribute
B. IGP extension
C. RSVP extension
D. LDP extension
E. PIM extension
Answer: B
QUESTION 20
Which are the three benefits of using the Yang model? (Choose three.)
A. Reduce lab footprint
B. Improve access to resources
C. Support interoperability that provides a standard way to model management data
D. Support simplified network management applications
E. Provide a scale virtual lab environment
F. Support programmatic interfaces
Answer: CDF
Explanation:
https://tools.ietf.org/html/rfc6020#page-11
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