You can add the MAC addresses of hosts that you want to allow the access in a database, if you are working on a large scale, and then compare the MAC address of the user in you network wall and allow th users that are allowed.
Or if you are working on a small scale then in your program you can save the MAC in an array or model class and compare when the user will access.
Answer: High-level computer languages must be translated into assembly or machine languages by a compiler before they can be executed, making them slightly slower to execute than raw assembly or machine language. The answer is D.
Answer:
The answer is False
Explanation:
IOT or Internet of things refers to the multiple devices in the world today, which are connected to the internet, they gather and share specific information. Any physical object can become an IOT device once it can be connected to the internet to control its data.
Since, the business is involved in utilities, critical infrastructure, or environmental services, it will not benefit from traffic-monitoring applications.
<span><span>1.)From the Insert tab, select the Shapes command. A drop-down menu will appear.
</span><span>2.)Select the desired shape
3.)</span></span>Click and drag<span> the slide to create the shape. You may need to move or resize the shape so it points to the desired part of the image.
4.)</span><span>f you want your callout to contain text, start typing while the shape is selected.
5.)</span><span>From the </span>Format<span> tab, you can use the options in the </span>Shape Styles<span> group to customize the appearance of the shape. You can also adjust the font from the Home tab</span>
Answer:
1. To trace an email we need to examine the header part of the email. By examine the header of an email we could extract the sender, subject and other important credentials related to that email.
2. The command to trace the email id is “whois” command.
First open the email client and find the IP address of the received email that need to be traced. The command “whois” IP address gives the registration information of that IP address.
3. Reverse address/email search is the procedure used by the experts to find the origin or the ownership of the email. Rather than tools websites are more use full in the reverse address search.
http://reverse.addresssearch.com, www.iplocation.net, etc. are good to find the ownership of an email.
4. We need to set up mail server to send, receive and to explore various activities associated with an email. The other related purpose servers like SMTP server, HTTP server , etc are also required to assist large organizations. The mail server can be a stand-alone computer or a collection of computer and servers.
5. The executable files should be examined thoroughly in the server, it can be dangerous malwares. The examination is mainly done by scanning for malicious words and sender address. Since many mail providers does not allow executable files to send, so the attackers are using other files also as a carrier of the malwares, so now every emails should be subject to deep examination using some malware scanner.
6. By the time of examination the some of the legitimate mails may also come under the suspect list so further check is needed there. At the same time the attacks can be from legitimate sources also this could be go un-noticed; this should be also a challenge to face in the stage of e-mail examination.
