Answer:
Physical layer never need the header/footer.
Explanation:
The physical layer performs the data transfer in bits through the cables. Various Interface cards like Bluetooth, RS-485, GSM, wireless options, etc., are part of the Physical layer. And in other words, the Physical layer ensures the mechanical or electrical interface between the two devices concerned. The data is being transferred in the form of electrical signals, and this implies that the Physical layer never requires a header or footer for its processing. Though, the application, internet, and transport layer all need headers/footers, as they carry important information required by them for the processing at their level.
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I hope this helps :)
<span>The length of the IPv4 header</span>
Hi there,
It is either b or d
<h3>Web site</h3>
The term “web site” is commonly used to describe <u>a collection of web pages and related content published</u> simultaneously on at least one server and identified by a common domain name. A web site is a collection of many web pages that are linked together under the domain name of the same company.
<h3>Web page</h3>
Web pages are a type of hypertext document which can be found on the World Wide Web. In a web browser, a user can view a web page that has been delivered by a web server to their computer. It is the name “web page” itself that is a metaphor for the binding of paper pages together to make a book.
<em>Hope this helps :)</em>