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Question 20

On the PTN equipment, when the tunnel bears data and forwards, which one is wrong in the description of the actions of each node on the LSP?

Options:

A.

lngress encapsulates the data entering the MPLS domain

B.

The Transit node searches the label forwarding information table and performs label switching

C.

Penultimate jump pop-up label

D.

In Layer 3 forwarding, the Egress node needs to look up the routing table

Question 21

Where in the L2/L3 node is the VLAN in the Layer 2 header stripped in the packet sent by the base station in the LTE solution?

Options:

A.

L3VE sub-interface

B.

Network side interface

C.

Network side interface

D.

LOOPBACK interface

Question 22

MPLS is used to label packets instead of IP forwarding. Which of the following descriptions about MPLS packet encapsulation are correct?

Options:

A.

The Type field in the ETH header is set to 0x8847 to indicate that it is followed by MPLS label encapsulation

B.

The nested encapsulation of MPLS can only be two layers, PW and Tunnel two layers of labels

C.

The MPLS label of the Tunnel carrying the PW, where the S bit is set to 1

D.

IP packets can be directly carried on the Tunnel

Question 23

During the troubleshooting process, if you need to loopback the protected services carried by the NG WDM device, which of the following operations need to be performed first when performing the loopback

operation?

Options:

A.

Switch to the protection channel

B.

Lock on the current channel

C.

Test to see if the ring is normal

D.

Verify that the APS protocol is enabled

Page: 5 / 11
Exam Code: H35-260
Exam Name: HCSA-Field-Transmission & PTN V1.0
Last Update: Nov 24, 2024
Questions: 326
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