The reason why computers has the need to periodically check
for the DNS of websites that an individual has already visited because certain
websites can change its IP address and that the individual using it can be
directed to a different website that he or she does not know of.
Answer:
The Transport Layer Security (TLS) protocol adds a layer of security on top of the TCP/IP transport protocols. TLS uses both symmetric encryption and public key encryption for securely sending private data, and adds additional security features, such as authentication and message tampering detection
Metatags provide information about web-sites. They are invisible on the page, and can contain for example a page description that google picks up for showing in the search results. A list of keywords is also commonly added using a meta tag.
Here is an example:
<span><meta<span> name="description" content="My very cool webpage on pets."</span>></span>
<span> </span><span><meta<span> name="keywords" content="dogs, cats"</span>></span>
<span> </span><span><meta<span> name="author" content="John Doe"</span><span>></span></span>
Answer:
In Worksheet the row are represented in 1, 2, 3, form in sequence No. of rows in one work sheet is 1048576.
And Column represented in A, B, C form. Column A mean 1st Column, B means 2nd this sequence goes on up to XFD means 16384th column
Naming sequence is A, B, C, ...XFD