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Xen Virtualization by Prabhakar Chaganti

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Routed Networking

Routing is a technique that uses IP forwarding to relay network traffic from one segment to another. In this case, dom0 in Xen acts as a conduit for the guest domains to communicate with the outside world. All network traffic sent to and received by the guest domains goes through and is forwarded by dom0. Routing uses the IP addresses to figure out where to send the network packets.

Routing acts at a higher level than the bridging technique, which only looked at the MAC address to find out the destination. Routing and bridging accomplish the same task, but use different methods to move information from source to destination. IP forwarding relays packets from one network segment to another if the proper routing entries exist in ...

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