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2021 Nov 642-887 spcore download:
Q21. On Cisco routers, which QoS marker is only locally significant?
A. DSCP
B. MPLS EXP
C. IP precedence
D. QoS group
E. discard eligible (DE)
Answer: D
Q22. Which QoS mechanism is used for congestion avoidance?
A. LLQ
B. CBWFQ
C. WRED
D. LFI
E. traffic policing
Answer: C
Q23. The Cisco IOS and IOS XE qos pre-classify command allows which kind of packet classification on IP packets that are encapsulated with GRE and IPsec?
A. allows for packets to be classified based on the ToS byte values before packet encryption
B. allows for packets to be classified based on the ToS byte values after packet encryption
C. allows for packets to be classified based on the packet payload before packet encryption
D. allows for packets to be classified based on the packet payload after packet encryption
E. allows for packets to be classified based on the packet header parameters other than the ToS byte values after packet encryption
Answer: A
Q24. DS-TE implementations on Cisco routers support which bandwidth pool(s) and class type(s)? (Choose two.)
A. global pool only
B. subpool only
C. global pool and subpool
D. class-type 0 only
E. class-type 1 only
F. class-type 0 and class-type 1
Answer: CF
Q25. Refer to the partial Cisco IOS XR configurations exhibit for Router 1 and Router 2.
There are two routers that are connected back to back over the Gigabit Ethernet link. If the "show mpls ldp neighbor" command output on Router 1 does not show LDP peering with Router 2, what could be the possible root cause of the LDP peering problem?
A. missing interface under OSPF IGP configuration
B. hello timers mismatch on Router 1 and Router 2
C. password for LDP session mismatch on Router 1 and Router 2
D. MPLS LDP session protection is not configured
Answer: A
Leading ccnp sp 642-887:
Q26. Which affinity value will be matched by the affinity bit mask of the affinity 0xFF00000A mask 0xFFFF000F command?
A. 0xFFFF000A
B. 0xFF00EEEA
C. 0xFF000000
D. 0x00000000
E. 0x11110001
Answer: B
Q27. What is the correct formula for determining the CIR?
A. CIR = Bc/Tc
B. CIR = Bc x Tc
C. CIR = Tc/Bc
D. CIR = Bc + Be
E. CIR = Tc/(Bc+Be)
F. CIR = (Bc+Be)/Tc
Answer: A
Q28. 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
Q29. 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
Q30. 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