نتایج جستجو برای: sip

تعداد نتایج: 2860  

The mechanisms which enable the vast majority of computer attacks are based on design and programming errors in networked applications. The growing use of voice over IP (VOIP) phone technology makes these phone applications potential targets. We present a tool to perform security testing of VOIP applications to identify security vulnerabilities which can be exploited by an attacker. Session Ini...

Journal: :iranian journal of basic medical sciences 0
hua-zhong liu college of chemistry and environment, guangdong ocean university, zhanjiang 524088, china wei xiao guangxi buffalo research institute, chinese academy of agricultural sciences, nanning 530001, china college of food science & technology, guangdong ocean university, zhanjiang 524088, china yi-peng gu institute of food science & engineering technology, hezhou university, hezhou 542899, china ye-xing tao experimental center for sciences, guilin medical university, guilin 541004, china da-yan zhang college of food science & technology, guangdong ocean university, zhanjiang 524088, china

objective(s): this paper aims to investigate synergistic inhibition of polysaccharide from sepia esculenta ink (sip), a newly isolated marine polysaccharide in our laboratory, on breast cancer mda-mb-231 cells exposed to cisplatin. materials and methods: cell viability of mda-mb-231 cells was determined by cck 8 assay. median-effect concentration was analyzed using chou-talalay method that was ...

2007
Enrico Marocco Antonio Manzalini Marcello Sampò

This article provides a comparison of two of the most promising technologies which are supposed to be used for enabling communications over the Internet: IMS and P2PSIP. As their fields of adoptions are totally different – operators and mobile networks for the former, Internet and ephemeral communities for the latter – interoperability rather than competition seems to be the key for achieving a...

2014
V. Hilt H. Schulzrinne

Overload occurs in Session Initiation Protocol (SIP) networks when SIP servers have insufficient resources to handle all the SIP messages they receive. Even though the SIP protocol provides a limited overload control mechanism through its 503 (Service Unavailable) response code, SIP servers are still vulnerable to overload. This document defines the behavior of SIP servers involved in overload ...

2007
Holger Schmidt Teodora Guenkova-Luy Franz J. Hauck

The Session Initiation Protocol (SIP) is a general protocol for session setup and management, e.g., for VoIP. Current SIP networks build on a fixed infrastructure that relies on static network entities. General problems with this infrastructure, e.g., in ubiquitous ad-hoc networks, lead to a trend of integrating peer-to-peer mechanisms into SIP. We propose a generic architecture for decentralis...

2008
KyoungHee Ko Hwan-Kuk Kim JeongWook Kim Chang-Yong Lee HyunCheol Jeong

After 3GPP had selected SIP as the signaling protocol for IMS, it is expected that SIP plays an important role in IP multimedia services. But, since SIP-based services are offered over the internet, there are security threats inherited from the internet environment. There are also new security threats because new techniques have been introduced to deliver multimedia traffic over the internet. I...

Da-Yan Zhang Hua-Zhong Liu Hui Du, Jiang-Hua Shang, Wei Xiao, Ye-Xing Tao Yi-Peng Gu

Objective(s): This paper aims to investigate synergistic inhibition of polysaccharide from Sepia esculenta ink (SIP), a newly isolated marine polysaccharide in our laboratory, on breast cancer MDA-MB-231 cells exposed to cisplatin. Materials and Methods: Cell viability of MDA-MB-231 cells was determined by CCK 8 assay. Median-effect concentration was analyzed using Chou-Talalay method that was ...

Objective(s):Cyclophosphamide (CP) toxicity on testis was hampered by squid ink polysaccharide (SIP) via restoration of antioxidant ability in our previous investigations. This study investigated roles of Nrf2/ARE signal pathway in testis of treated mice. Materials and Methods: Male Kunming mice were employed to undergo treatment with SIP and/or CP. Protein levels of Nrf2, keap-1, histone deac...

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