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With reference to the given case study, one of the security goals requires to configure a secure connection between the Boston distribution center and the headquarters. You want to implement IP filter to fulfill the security requirements. How should you implement IP filters at the headquarters?
(Click the Exhibit button on the toolbar to see the case study.)
To implement IP filters at the headquarters, add source filters for the Boston distribution center for UDP port 1701 and IP protocol 50. Also,
add destination filters for the headquarters for UDP port 1701 and IP protocol 50.
The Windows 2000 Router service provides routing services in the LAN and WAN environments, and over the Internet, using secure virtual
private network (VPN) connections. The VPN connections are based on the Point-to-Point Tunneling Protocol (PPTP) and the Layer 2 Tunneling
Protocol (L2TP)
L2TP is very similar to PPTP but uses UDP, and therefore can be used over asynchronous transfer mode (ATM), Frame Relay, and X.25
networks as well. When L2TP is used over IP networks, it uses a UDP port 1701 packet format for both a control channel and a data channel.
L2TP can also be used with IPSec to provide a fully secured network link.
Further, IP packet filtering provides an ability to restrict the traffic into and out of each interface. Packet filtering is based on filters defined by
the values of source and destination IP addresses, TCP, and UDP port numbers, and IP protocol numbers.
Inbound filters that are applied to the receiving traffic allow the receiving computer to match the traffic with the IP Filter List for the source IP
address. Similarly, the outbound filters that are applied to the traffic leaving a computer towards a destination trigger a security negotiation
for the destination IP address.
That is why, to implement the IP filtering at the headquarters, you have to add a source address for the filters at the Boston center and a
destination address for the filters at the headquarters.
Which of the following listeners need not be configured in the deployment descriptor?
Each correct answer represents a complete solution. Choose two.
Except for the HttpSessionActivationListener and the HttpSessionBindingListener, all other listeners must be configured in the deployment
descriptor.
HttpSessionBindingListener has methods that notify the object when it is added to or removed from a session. It has methods that informs
the attributes when the session is about to be activated or passivated. These methods are related to the attributes and not to the complete
session. Hence, the container takes care of them and need not be configured in the deployment descriptor.
You want to append a tar file if the on-disk version of the tar file has a modification date more recent than its copy in the tar archive. Which of the following commands will you use to accomplish the task?
The tar -u command is used to append a tar file if the on-disk version of the tar file has a modification date more recent than its copy in the tar
archive.
Answer B is incorrect. The tar -t command is used to list the contents of an archive.
Answer D is incorrect. The tar -x command is used to extract the files from an archive.
Answer C is incorrect. The tar -c command is used to create a new archive of specified files.
You run the wc -c file1.txt command. If this command displays any error message, you want to store the error message in the error.txt file. Which of the following commands will you use to accomplish the task?
According to the scenario, you will use the wc -c file1.txt 2>error.txt command to accomplish the task. The 2> operator is an error
redirector, which, while running a command, redirects the error (if it exists) on the specified file.
Answer D and B are incorrect. The > or 1> redirector can be used to redirect the output of the wc -c file1.txt file to the error.txt file;
however, you want to write the errors in the error.txt file, not the whole output.
Answer A is incorrect. The >> operator will redirect the output of the command in the same manner as the > or 1> operator. Although
the >> operator will not overwrite the error.txt file, it will append the error.txt file.
You configure a wireless router at your home. To secure your home Wireless LAN (WLAN), you implement WEP. Now you want to connect your client computer to the WLAN. Which of the following is the required information that you will need to configure the client computer?
Each correct answer represents a part of the solution. Choose two.
In order to connect a client computer to a secured Wireless LAN (WLAN), you are required to provide the following information:
SSID of the WLAN
WEP key
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