单项选择题
After updating serverB’s network configurations， an administrator 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.
相关考题
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单项选择题
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. -
单项选择题
An administrator has set up serverA and serverB to use the /etc/hosts.equiv file so that applications on serverA can remotely run commands on serverB. Which command will verify if a new user from serverA is trusted on serverB？（）
A.As the root user from serverA run the command rhost serverB
B.As the root user from serverA run the command rlogin serverB
C.As the desired user from serverB run the command rhost serverA
D.As the desired user from serverA run the command rlogin serverB
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单项选择题
A system is experiencing packet routing problems，when the administrator runs ’netstat -nr’ the following default routes are displayed： default165.253.251.1UG51601304 en8-- default192.168.50.1UGH01590450 en4-- Assuming the first route is correct，how can the administrator remove the incorrect default route？（）
A.route delete default 192.168.50.1
B.access smit with the route_remove shortcut
C.chdev -l inet0 -a delroute=net，-hopcount，0，，192.168.50.1
D.flush the routing table from the console and configuring the 165.253.251.1 route
