The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2010
Filed:
Jul. 01, 2003
Applicant:
Masao Shimada, Tokyo, JP;
Inventor:
Masao Shimada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 12/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A network information detection apparatus includes a packet monitoring section and a subnet mask detection section. The packet monitoring section monitors packets on LAN connecting a plurality of network devices. Based on an IP address included in at least one monitored packet, the subnet mask detection section detects a subnet mask of a network device having the monitored IP address. When a destination MAC address and a destination IP address included in the monitored packet do not indicate the same network device, a router of the LAN can be detected by detecting an IP address corresponding to the destination MAC address.