The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The integrated manufacturing or production system is a cyber-physical system. According to the basic principle of defense in depth, the corresponding protection is carried out at different security zones. AS the key technologies of perimeter defense, industrial firewall is used between enterprise zone and manufacturing zone. By utilizing an industrial demilitarized zone in firewall, resources are...
IPv6 protocol has been widely deployed in the world. As the IANA pool of IPv4 addresses has run out, IPv6 will become increasingly important. Although the IPv6 protocol stack presents considerable advantages compared with the IPv4 protocol stack, IP source address spoofing is still exploited in IPv6 to initiate malicious attacks. Some techniques are proposed and deployed to implement source address...
In this paper, the technology of trusted boundary based on port trust value is discussed. When IP phones are connected to the existing switch-based campus area network, PC is connected to the access port of IP phone. To avoid IP phone is disconnected from the network and PC is directly into the switch port, trusted boundary based on port trust value is applied. In an IP PBX, trusted mode or untrusted...
A kind of personalization extension of Portal framework is studied. Based on the establishment of user pattern which can describe the characteristics of users' behaviors at runtime, a dynamical mechanism for Portiet composition driven by user pattern is presented, which is helpful for improving user experience. The prototypical experiments on the open-source Liferay framework verify the feasibility...
In this paper, the technology of auxiliary VLAN is discussed. When IP phones are connected to the existing switch-based campus area network, the data traffic and voice traffic are present on the VLAN at the same time. To avoid a significant reduction on the quality of the VoIP traffic, the voice traffic is separated from the data traffic on an auxiliary VLAN. In an IP PBX, there are three frame types...
The SIP-based VoIP system is build on the IP network, so it is affected by the IP network security problem. SIP-based VoIP system has many security problems because of the security mechanism of VoIP system and other external factors. These effects relate to the following three aspects: confidentiality, integrity and availability. This paper analyzed the mechanism of VoIP system and the components...
Video-on-demand service in wireless networks is one important step to achieving the goal of providing video services anywhere anytime. Typically, carrier mobile networks are used to deliver videos wirelessly. Since every video stream comes from the base station, regardless of what bandwidth sharing techniques are being utilized, the media stream system is still limited by the network capacity of the...
In this paper, the technology of MAC-based VLANs which adapts to mobile office in campus area network is discussed. VLANs offer a number of advantages over traditional LANs. There are mainly two types of VLANs used by campus area network: Port-based VLANs and MAC-based VLANs. The characteristics of MAC-based VLANs are illuminated and this type VLANs is the best choice of campus area network because...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.