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In computing, a virtual address space (VAS) or address space is the set of ranges of virtual addresses that an operating system makes available to a process. [1] The range of virtual addresses usually starts at a low address and can extend to the highest address allowed by the computer's instruction set architecture and supported by the operating system's pointer size implementation, which can ...
It forms part of the Virtual Square [1] project from the Italian Bologna University whose code is available on public servers using free software licenses, mostly GPLv2. Researchers at the Department of Mathematics and Computer Science, Xavier University , Cincinnati OH, US are also working on the project.
For example, in case of Openstack, network is provided by Neutron which leverages many features from the Linux kernel for networking: iptables, iproute2, L2 bridge, L3 routing or OVS. Since the Linux kernel cannot sustain the 10G packet rate [ citation needed ] , then some bypass technologies for a fast path are used.
In telecommunications networks, a node (Latin: nodus, ‘knot’) is either a redistribution point or a communication endpoint.. A physical network node is an electronic device that is attached to a network, and is capable of creating, receiving, or transmitting information over a communication channel. [1]
Nodes are created by the mknod system call. The command-line program for creating nodes is also called mknod. Nodes can be moved or deleted by the usual filesystem system calls (rename, unlink) and commands (mv, rm). Some Unix versions include a script named makedev or MAKEDEV to create all necessary devices in the directory /dev. It only makes ...
For example, a virtual session border controller could be deployed to protect a network without the typical cost and complexity of obtaining and installing physical network protection units. Other examples of NFV include virtualized load balancers , firewalls , intrusion detection devices and WAN accelerators to name a few.
RIP (Real IP address): the IP address used to connect to the cluster nodes; DIP (Directors IP address): the IP address used by the director to connect to network of real IP addresses; CIP (Client IP address): the IP address assigned to a client computer, that it uses as the source IP address for requests being sent to the cluster
A virtual IP address (VIP or VIPA) is an IP address that does not correspond to a physical network interface. Uses for VIPs include network address translation (especially, one-to-many NAT ), fault-tolerance, and mobility .