Lpi 202-400 問題集

質問 1：

A. If the server doesn't know the answer to a query, it sends a query to a root DNS server.
B. Any host, from any network, may use this server as its main DNS server.
C. If the server doesn't know the answer to a query, it sends a recursive query to 192.168.0.4 and, if this fails, it returns a failure.
D. If the server doesn't know the answer to a query, it sends a recursive query to 192.168.0.4.
E. Hosts in the network 10.0.0.0/24 will be able to ask for zone transfers.
正解：D

質問 2：
Which setting in the Courier IMAP configuration file will tell the IMAP daemon to only listen on the local host interface?
A. LOCALHOST_ONLY=1
B. Listen 127.0.0.1
C. INTERFACE=127.0.0.1
D. ADDRES5=127.0.0.1
正解：D

質問 3：
A web server is expected to handle approximately 200 simultaneous requests during normal use with an occasional spike in activity and is performing slowly. Which directives in httpd.conf need to be adjusted?
A. MinSpareServers & MaxSpareServers.
B. MinServers, MaxServers & MaxClients.
C. MinSpareServers, MaxSpareServers, StartServers, MaxClients & KeepAlive.
D. MinSpareServers, MaxSpareServers, StartServers & MaxClients.
正解：D

質問 4：
An iptables firewall was configured to use the target MASQUERADE to share a dedicated wireless connection to the Internet with a few hosts on the local network.
The Internet connection becomes very unstable in rainy days and users complain their connections drop when downloading e-mail or large files, while web browsing seems to be working fine.
Which change to your iptables rules could alleviate the problem?
A. Change the target MASQUERADE to SNAT
B. Change the target MASQUERADE to BALANCE and provide a backup Internet connection
C. Change the target MASQUERADE to BNAT
D. Change the target MASQUERADE to DNAT
E. Change the target MASQUERADE to REDIRECT and provide a backup Internet connection
正解：A

質問 5：
Specify the command to create a SSH key-pair. (Specify ONLY the command without any path or parameters.)
正解：
ssh-keygen