Networking is not working for several guests on a particular host. Which two commands can help troubleshoot the networki

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Networking is not working for several guests on a particular host. Which two commands can help troubleshoot the networking?

A. xm list -1 will show all of the network interfaces for all of the virtual machines, which can be used to see which bridge is having problems.
B. config_network.py -l will show which network interfaces are in use, and which are having problems.
C. brctl show will show the status of each bridge, and which VIFs are connected to it. This canthen be used to determine which bridge is having problems.
D. System-config-network will list the virtual interfaces, which can be inspected to see which are having problems. E. ifconfig -a will show a list of all network interfaces and their current status, which will help determine which bridge is having problems.