FACTOID # 40: South America is unusual in that it is both highly urbanized and poor.
 
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Encyclopedia > Sequenced packet exchange

Sequenced Packet Exchange (SPX) is an old Novell protocol used to manage the Novell Internetwork Packet Exchange (IPX) that allowed Novell Servers and clients to communicate over LAN (Local Area Networks) and WAN (Wide Area Networks).


The advantages of one machine easily finding another machine on the LAN was a disavantage on a WAN since it needed so much overhead. TCP/IP is now a more common protocol stack for both WAN and LAN.


  Results from FactBites:
 
An Inside Look at SPX Communications between RPRINTER/ NPRINTER and the NetWare Print Server (8097 words)
An analysis of these packets provides an inside look at the information that is exchanged when the remote printer module initially connects to the print server, when a print job is sent to the print server, and when the print services connection is in an idle state.
Packet 871 is in response to the data sent to the print server in Packet 869, which told the print server that NPRINTER had one empty buffer.
Packet 873 is a system packet that is an acknowledgement to Packet 871, when NPRINTER received new data from the print server and the print server sent a Send ACK call in the Connection Control field.
Protocols (2609 words)
To move a packet to the proper node on a network, a medium-access control (MAC) header is placed at the beginning of every packet.
Any packets IPX receives that are addressed to that socket are passed on to the corresponding process.
A response packet can be either a reply to a request from a router or workstation or a periodic broadcast by a router.
  More results at FactBites »


 

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