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NO.1 Implementing IPoDWDM interfaces on Cisco CRS routers eliminates the need for which network
component?
A. ROADM
B. external transponders
C. electrical-optical-electrical converters
D. electrical cross-connect
Answer: B
Explanation:
IP over DWDM (IPoDWDM) is a technology used in telecommunications networks to integrate IP
Routers and Switches in the OTN (Optical Transport Network).

NO.2 In which two Cisco IOS XR configuration modes can mpls ldp igp sync be configured? (Choose
two.)
A. config-ldp
B. config-if
C. config-ospf-ar
D. config-ospf
E. config-isis
Answer: C,D

NO.3 Scenario:
On PE7 which statement is correct regarding the "traffic-policing" policy-map?
A. The "traffic-policing" QoS policy is applied to the Gi0/0/0/0 interface in the outbound direction.
B. The "traffic-policing" QoS policy will police the traffic matched by the "test12" ACL to 3 mbps and
will drop all exceeding traffic.
C. All incoming traffic not matched by the "test12" ACL to the Gi0/0/0/0 interface will be dropped.
D. The "traffic-policing" QoS policy is using dual rate class-based traffic policing.
Answer: B
Explanation:
#show running-config policy-map #show policy-map

NO.4 With unmanaged CE routers, at which point in the service provider network is the QoS trust
boundary, and what is required at the trust boundary?
A. between the CE and PE router and mapping of the customer traffic classes into the service
provider traffic classes at the PE router ingress
B. between the CE and PE router and trusting the QoS markings from the CE router and applying the
required QoS mechanisms based on the customer QoS markings
C. between the PE and the P router and mapping of the customer traffic classes into the service
provider traffic classes at the P router ingress
D. between the PE and P router and trusting the QoS markings from the CE router and applying the
required QoS mechanisms based on the customer QoS markings
E. between the customer network and the CE router ingress and applying the required egress QoS
policy on the CE router
Answer: A

NO.5 Which statement describes the QoS behavior between P and PE routers of an MPLS provider
network for an L3VPN service?
A. The PE function honors DSCP markings set by the CE.
B. The customer and provider must agree on DSCP classification and traffic priorities.
C. Classification of customer traffic is handled by the P router.
D. The PE function cannot map DSCP markings to MPLS EXP bits.
Answer: B

NO.6 Referring to the traceroute output exhibit that is shown,
which statement is correct?
A. There is no problem with the end-to-end LSP as indicated by the successful trace.
B. Normal PHP operation is performed by the hop 4 router.
C. The end-to-end LSP is broken at hop 4.
D. At each hop, each LSR is able to perform label swapping.
Answer: C

NO.7 A network engineer must analyze RSVP-TE signaling on a syslog server. Which three RSVP
messages are valid? (Choose three.)
A. RSVP PATH
B. RSVP RESERVATION
C. RSVP ESTABLISHED
D. RSVP PATH TEAR
E. RSVP KILL
F. RSVP INIT
Answer: A,B,D

NO.8 What is the term that is used for the label that an LSR assigns and distributes to other LSRs in
MPLS?
A. Local
B. Remote
C. Explicit
D. Explicit Null
E. Aggregate
Answer: A