企業に広がるIP電話,セキュリティは大丈夫? ファイアウォールだけでは不十分,SIP対応のゲートウエイ製品が続々

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Material Type: 記事
Title: 企業に広がるIP電話,セキュリティは大丈夫? ファイアウォールだけでは不十分,SIP対応のゲートウエイ製品が続々
Author/Editor: 河井保博
Author Heading: 河井保博
Periodical title: 日経Internet solutions : 日経インターネットソリューション
No. or year of volume/issue: (75) 2003.10
Issue: 75
Pages: 47～50
Publication date of volume/issue (W3CDTF): 2003-10
ISSN (Periodical Title): 1347-6580
ISSN-L (Periodical Title): 1347-6580
Publication (Periodical Title): 東京 : 日経BP社
Place of Publication (Country Code): JP
Text Language Code: jpn
NDLC: ZM13
Target Audience: 一般
Holding library: 国立国会図書館
Call No.: Z14-B487
Data Provider (Database): 国立国会図書館 : 国立国会図書館雑誌記事索引
https://ndlsearch.ndl.go.jp
Bibliographic ID (NDL): 6708035
http://id.ndl.go.jp/bib/6708035
Bibliographic Record Category (NDL): 632