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The ZLB ( Zero-Length Bod ) message is a control message with only an L2TP header, and its function is to serve as an explicit response to ensure reliable delivery of the control message.
In the following four cases, LNS does not send ZLB message to LAC as a response: ____ .
- A . the LNS received LAC transmit the CDN ( Call-Disconnect- Notif , call disconnection notification ) after the message
B.After LNs receive the ICCN ( Incoming-Call-Connectea , call connected ) message sent by LAC
C.After the LNS receives the Hello control message sent by the LAC
D.LNS receives StopCCN ( scop-Control-Connection-Notiflcation ) sent by LAC ; after the message
Suggested Answer: C
Posted : 06/01/2023 2:24 pm