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[CISSP-D] Packet analysis with text paging

from [SQ Lawrence] Network Security [Permanent Link]
Subject: [CISSP-D] Packet analysis with text paging
Date: Wed, 20 Apr 2005 22:35:26 -0700 (PDT) 
Hey,
My question is a little off the path of the Network Domain. In a recent 
Security course I was performing packet analysis. A classmate mentioned that 
inappropriate text pages were being sent internally at his place of work. He 
also said they couldn't trace the text pages.
 
Here is were I become curious. The text messages are being sent from internal 
PCs using a paging client application through the company Intranet,  to 
individuals wearing pagers inside the facility. The pagers can only recieve 
messages internally. 
 
I was thinking that the text messages are traveling across a packet-switched 
network which means the packet headers contain a source IP address. This would 
identify the originating machine. 
 
How does data flow from a PC to a pager on an internal network? How can it be 
traced?
 
Thanks for any assistance.
SQL

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