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BFR92AW Datasheet | Philips Semiconductors
Part No. : BFR92AW
Description : NPN 5 GHz wideband transistor
Download : BFR92AW Click to Download
Page Number : 12
Manufacturer : Philips Semiconductors
File Size : 91 Kb

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3. NDISWAN PPP frames will be submitted to the L2TP protocol driver, the driver is responsible for adding L2TP PPP frame header outside the second step package. In the L2TP header, Tunnel ID and Call ID identifies the combination of a tunnel. 4. L2TP protocol driver then encapsulated packet presented to the TCP / IP protocol driver, and told the driver, as the L2TP UDP datagram messaging, both ends of the UDP port numbers are 1701. 5. TCP / IP protocol driver to add to the IP packet header and UDP header. Then analysis of IPSec packets, select the security policy to match, and in this security policy, based on the UDP datagram message to add the appropriate part of the ESP header, trailer, for IPSec encryption package. IPSec complete package, will the original IP header protocol field value set to 50, while adding the IP header outside the packet in ESP. Later, TCP / IP protocol driver to the results released to the message presented to the local ISPs dial-up connection interface that comply with the Network Driver Interface Specification NDIS. 6. NDIS submits the packet again to the NDISWAN. 7. NDISWAN provided by the PPP data link layer header, trailer, and will submit the final form of the PPP frame to give the corresponding hardware, dial-up WAN miniport driver.
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