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H31-161 PDF DEMO:
QUESTION NO: 1
As shown in the figure, the DiffServ model is deployed in E-LSP mode on the MPLS network. A tester connects to GE interfaces of RTA and RTC on the edge of the MPLS network through GE links.
The trust upstream default command is configured for interfaces on the IP access side of RTA and
RTC. When the tester sends IP packets with DSCP values 10, 12, and 14,the DSCP values of IP packets received at the receiver side are supposed to remain unchanged. However, the DSCP values of all received IP packets are 10. In this case, which of the following statements are true? (Default mapping is configured between the EXP and DSCP values on each router.)
A. The DSCP values of packets the tester receives are 10 regardless of whether qos phb disable is configured for the outbound interface on RTC's IP access side.
B. The configurations on RTA or RTC are incorrect.
C. If the qos phb disable command is configured for the outbound interface on the IP access side of
RTC, the DSCP values of packets the tester receives remain unchanged.
D. The DSCP values are 10 when RTA's IP packets leave the MPLS network because the EXP values are
1 when RTA's IP packets enter the MPLS network.
Answer: C,D
QUESTION NO: 2
As shown in the figure, CEs connect to users 1 and 2 through access interfaces or links.
[Quidway-GigabitEthernet1/0/4]portswitch
[Quidway-GigabitEthernet1/0/4]port link-type access
[Quidway-GigabitEthernet1/0/4]port default vlan 1
[Quidway-GigabitEthernet1/0/6]portswitch
[Quidway-GigabitEthernet1/0/6]port link-type access
[Quidway-GigabitEthernet1/0/6]port default vlan 2
[Quidway-GigabitEthernet1/0/3]portswitch
[Quidway-GigabitEthernet1/0/3]port link-type trunk
[Quidway-GigabitEthernet1/0/3]port trunk permit-pass vlan 1 to 2
Users 1 and 2 require different network transmission quality. Which of the following methods are feasible to configure 802.1p priority 1 for packets of user 1 and 802.1p priority 2 for packets of user
2?
A. On a PE, configure vlan-stacking and STC for interfaces on the private network for users 1 and 2.
B. On a PE, configure Dot1q tunnel interfaces and simple traffic classification (STC) for interfaces on the private network.
C. On a PE, configure vlan-mapping and STC for interfaces on the private network for users 1 and 2.
D. On a CE, configure STC for user VLANs on the user access side.
Answer: A,C
QUESTION NO: 3
Which statement about MPLS Echo packets is true?
A. The MPLS Echo request is an ICMP packet.
B. The MPLS Echo request is a UDP packet.
C. The type value of the MPLS Echo request packet is 0.
D. The type value of the MPLS Echo reply packet is 8
Answer: B
QUESTION NO: 4
As shown in the figure , CE and CE 2 belong to VPN A, CE 3 and CE 4 belong to VPN B, VPN A and VPN B share the public network tunnels between border PE 1 and PE 2, and LDP tunnels are configured between PE 1 and PE 2. To isolate resources for VPN service data from PE 2 to PE 1, a unidirectional TE tunnel is configured t forward data from PE1. The QoS policy propagation though the border gateway protocol (QPPB) feature is configured on PE 2, and a QoS policy is defined when
VPNs are bound to tunnel interfaces.
Which of the following statements about the configurations on PE 2 are true?
A. The maximum reserved bandwidth must not exceed the bandwidth of the physical links.
B. The mpls te commit command must be configured on the Post/0/0 interface.
C. The maximum reserved bandwidth must not exceed the bandwidth of the tunnels.
D. The mpls te commit command must be configured on the Tunnel1/0/0 interface,
E. The mpls te cspf command must be configured in the global MPLS view.
Answer: A,D,E
QUESTION NO: 5
As shown in the figure, DUT stands for the device under test and RTA is used to support the test. Which combination of the following configurations is mandatory for fast convergence?
1. BFD
2. Minimum LSP refreshing interval
3. Most sensitive SPF timer
4. Minimum Hello packet sending interval
5. Minimum LSP sending interval
6. Longest computing time of SPF slices
7. Minimum LSP retransmission interval
8. Minimum LSP generation time
9. Flash-flood
10. GR function
11. Setting cost-style to wide
A. 1, 2, 3, 5, 7, 8, 9
B. 3, 5, 6
C. 3, 5, 6, 8, 9C.1, 3, 5, 6, 9
Answer: C
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Updated: May 27, 2022