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Which three statements are true concerning the IPTABLES Oracle Linux firewall?
A: You need to specify the table and the chain for each firewall rule you create. There is an exception: Most rules are related to filtering, so iptables assumes that any chain that's defined without an associated table will be a part of the filter table. The filter table is therefore the default.
D: Nat Network Address Translation
PREROUTING
Address translation occurs before routing. Facilitates the transformation of the destination IP address to be compatible with the firewall's routing table. Used with NAT of the destination IP address, also known as destination NAT or DNAT.
POSTROUTING
Address translation occurs after routing. This implies that there was no need to modify the destination IP address of the packet as in pre-routing. Used with NAT of the source IP address using either one-to-one or many-to-one NAT. This is known as source NAT, or SNAT.
OUTPUT
Network address translation for packets generated by the firewall. (Rarely used in SOHO environments)
F: There are three tables in total. The first is the mangle table which is responsible for the alteration of quality of service bits in the TCP header.
The second table is the filter queue which is responsible for packet filtering. It has three built-in chains in which you can place your firewall policy rules.
The third table is the nat queue which is responsible for network address translation.
During the setup of additional swap space on an ext2 files system, you encounter an error as shown below:
Which action must you perform to add additional swap space?
Consider the output shown:
#rpm --i sendmail-cf-8.14.4-8.e16.noarch.rpm
Error: Failed dependencies:
Sendmail = 7.14.4-8.e16 is needed by sendmail-cf-8.e16.noarch
# rpm --i sendmail-8.14.4-8.e16.x86_64.rpm
# rpm --i sendmail-cf-8.14.4-8.e16.noarch.rpm
# rpm -q sendmail sendmail-cf
Sendmail-8.14.4-8.e16.x86_64
Sendmail-cf-8.e16_64
Sendmail-cf-8.14.4-8.e16.noarch
# rpm --e sendmail
Which statement is true about the execution of the rpm -e sendmail command?
Which two statements are true about the installation of certain components of asmlib in Oracle Linux 6?
B: The oracleasm kernel driver is built into the Unbreakable Enterprise Kernel for Oracle Linux 6 and does not need to be installed manually.
F: All ASMLib installations require the oracleasmlib and oracleasm-support packages appropriate for their machine.
Incorrect:
not A: The oracleasm kernel driver for the 64-bit (x86_64) Red Hat Compatible Kernel for Oracle Linux 6 can be installed manually.
Which two statements are true concerning OpenSSH configuration files? (Choose two.)
