Which daemon identifies available filesystems throughthe /etc/xtab file?（）

A.nfsd
B.biod
C.rpc.lockd
D.rpc.mountd

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A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs.
Which of the following provides greatest resiliency?（）

A.Two switch ports will be needed on a switch, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
B.Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
C.Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, two different IP addresses will be needed.
D.One switch port will be needed on one switch, a splitter will be needed to split the connection, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and two different IP addresses will be needed.

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After updating serverB's network configurations, anadministrator notices that serverA, which resides in a different subnet, is unable to communicate with serverB via ssh or telnet. As ping's to the server fail, the administrator logs onto serverB via a console and finds an available interface en0 in the 'up' state. From the console connection, en0 can communicate with other servers in the same subnet.
What is the most likely cause of the problem?（）

A.en0 has no associated ip address.
B.serverB is missing its default route.
C.serverB and serverA cannot connect due to a firewall.
D.en0 has been set up to block traffic from servers that are in different subnets.

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The ping loopback hangs with no output.Which of the following is the most likely cause?（）

A.The loopback interface is down and resolv.conf is configured.
B.The loopback is not in /etc/hosts and resolv.conf is configured.
C.The loopback interface is down and resolv.conf is not configured.
D.The loopback is not in /etc/hosts and resolv.conf is not configured.

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