問題文
An operator must verify basic reachability between two InfiniBand nodes. Which statement about the appropriate tool is correct?
選択肢
- It runs as a single command with no counterpart on the other node, because the reachability check is answered by the switching silicon on the path rather than by software on the destination host, which is what makes it usable against a node whose operating system has stopped responding.
- It runs as a client and a server, with the client role as the default, and it uses vendor management messages rather than the internet protocol.
- It can only be run from the host that holds the management entity, because the check is issued as part of the entity's own sweep of the fabric and any other host has to ask that host to run it on its behalf.
- It requires the internet protocol interface over the fabric to be configured on both nodes, and the check is carried inside ordinary packets of that protocol, and a node with that interface down stays unreachable.