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Q1. Which of the following three statements are correct regarding IPv6 QoS? (Choose three.)
A. The traffic class field in the IPv6 header can be used to set specific precedence or DSCP values.
B. A 20-bit flow label field enables per-flow processing.
C. DS-TE is not supported by IPv6.
D. Per-hop behavior in IPv6 networks is based on EXP bits.
E. IPv6 QoS features are configured using the modular QoS CLI on Cisco routers.
Answer: ABE
Q2. Which field in the MPLS shim header is used to support different QoS markings?
A. IP precedence
B. DSCP
C. EXP
D. ToS
E. S
F. Label
Answer: C
Q3. Which two statements are correct in describing ISP environments that are running IP/MPLS in the core network? (Choose two.)
A. On the PE routers, each BGP route must use a unique label to reach the BGP next hop.
B. The BGP next hops point to the PE routers, and only the PE routers are required to run BGP.
C. A full mesh of IBGP sessions are required between all of the PE and P routers to ensure proper packets forwarding.
D. The PE and P routers run LDP to learn the labels for reaching the BGP next-hop addresses.
Answer: BD
Q4. When using the tunnel mpls traffic-eng path-option 1 explicit name test command in Cisco MPLS TE tunnel configurations, the test explicit-path configuration will consist of a list of which values?
A. tunnel endpoint
B. resource class affinity
C. MPLS label
D. IP address
Answer: D
Q5. 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
Q6. Within the service provider core network, which two QoS mechanisms are typically deployed on the P routers? (Choose two.)
A. LLQ
B. traffic policing and remarking
C. WRED
D. traffic shaping
E. traffic classification and markings
F. link fragmentation and interleaving
Answer: AC
Q7. 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
Q8. Which two features are used to provide Cisco MPLS TE node and link protection? (Choose two.)
A. autoroute
B. fast reroute
C. backup tunnels
D. BFD
Answer: BC
Q9. 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
Q10. When troubleshooting LDP operations on the Cisco IOS and IOS XE routers, what is one of the first things that should be verified?
A. if running OSPF as the IGP, ensure that OSPFv3 has been enabled
B. check if the ip cef command has been enabled
C. verify in the running configurations that all of the required LDP interfaces are defined under the mpls ldp command configuration mode
D. verify if there are any access lists that are denying TCP and UDP port 464 packets
Answer: B