An administrator is setting UP a NAT gateway. Two interfaces have been configured:

The firewall configuration has been completed:

The IP forwarding configuration parameter is:

When testing the NAT from a workstation, the administrator encounters an issue:

Which of the following is the MOST likely cause of the packet loss?

A user needs to modify the IP address of a laptop. Which of the following files can be used to configure the network interface named eth0?

Which of the following default files are typically used to contain a list of public keys from other computers? (Choose two.)

An administrator notices the HISTSIZE variable is 50, using the commands below:
HISTSIZE=50
export HISTSIZE
The administrator rechecks the HISTSIZE value using echo HISTSIZE but gets no value. Which of the following commands should the administrator use to retrieve its value?

A Linux administrator has configured a local named caching server to reduce the amount of time to resolve common DNS addresses. The server resolves using the external server, however; the administrator wants to avoid this configuration. The administrator verifies the named, conf settings to confirm the following relevant settings:
The administrator then runs dig twice to look up an external address and receives the following relevant output the second time.

Which of the following should the administrator do to correct the configuration?