Hitachi Cable, Inc.

Akihiro Sekiguchi

Koichiro Seto

A switching hub is provided with a control unit for setting, for a port, a VLAN-ID comprising a subgroup ID of a subgroup constituting a VLAN, and a sub-ID of a group contained in the subgroup ID, and a switching processing unit for relaying a frame, which contains the VLAN-ID, via the port, which matches the VLAN-ID.

Switching hub and LAN system

A reply communication apparatus conforms to a protocol to return a reply electronic document in reply to a request electronic document sent from a communication apparatus. The apparatus has a hardware to perform a reply process in the protocol, and is operable to rewrite contents of the request electronic document to replace the request electronic document into a reply electronic document and to output the reply electronic document.

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Tsuchiura, Japan

Akihiro Sekiguchi