201-400 試験問題を無料オンラインアクセス

CORRECT TEXT
You wish to notify all users that you have to take down a service on which they rely.
What command will allow you to send a message to all currently logged on users?(Enter the command not the path.)

CORRECT TEXT
Running tcpdump -nli eth1 icmp shows the following output:

What command, without options, parameters or arguments, was used on the host 192.168.123.5 to generate this output?

Which of the following filter keywords for tcpdump specify the transfer direction for network packets? (Choose TWO correct answers.)

• A.both
• B.src
• C.dest
• D.source
• E.src or dst

You have been asked to block network access to an NFS sever. You need to block all access except NFS access. Which of the following actions would you take to achieve this?

• A.Ensure that the nfs-access.o module is configured into the kernel and use the command
  "nfs-ctl-allow <your IP range>" to provide the required access
• B.Place "ALL: ALL" in /etc/hosts.deny and "portmap: ALL" in /etc/hosts.allow
• C.Make sure that xinetd is switched off.
• D.Add IPChains rules to deny all incoming packets except for portmapper
• E.Place "ALL: ALL" in /etc/hosts.deny and "NFS: ALL" in /etc/hosts.allow

What should be done to ensure a client machine uses the recursive nameserver running on the IP address 192.168.0.1? (Choose TWO correct answers.)

• A.Run route add nameserver 192.168.0.1.
• B.Run ifconfig eth0 nameserver 192.168.0.1.
• C.Run bind add nameserver 192.168.0.1.
• D.Add nameserver 192.168.0.1 to /etc/resolv.conf.
• E.Ensure that the dns service is listed in the hosts entry in the /etc/nsswitch.conf file.