How many layers are there in osi model?
multipleQAs
How many layers are there generally considered to be in the OSI model? How many layers are there in the OSI model when the user is included?
7
8
OSI model
How many layers are there in osi model?
OSI model List of network protocols (OSI model) Physical layer Abstraction layer Network layer Application layer Talk:List of network protocols (OSI model) Internet protocol suite X.25 Data link layer
Cross-<b>layer</b> functions are services that are not tied to a given <b>layer</b>, ... of two or 
more entities: <b>there</b> is a specific application-<b>layer</b> protocol, ... It can be used to 
carry <b>many</b> different kinds of traffic, including IP&nbsp;... This article lists protocols, categorized by the nearest <b>layer</b> in the Open Systems 
Interconnection <b>model</b>. This list is not exclusive to only the <b>OSI</b> protocol family. 
<b>Many</b> of these protocols are originally based on the Internet Protocol Suite ... Text 
is <b>available</b> under the Creative Commons Attribution-ShareAlike License;&nbsp;... In the seven-<b>layer OSI model</b> of computer networking, the physical <b>layer</b> or <b>layer</b> 
1 is the first and lowest <b>layer</b>. This <b>layer</b> may be implemented by a PHY chip. In computing, an abstraction <b>layer</b> or abstraction level is a way of hiding the 
working details of a subsystem, allowing the separation of concerns to facilitate 
interoperability and platform independence. Examples of software <b>models</b> that 
use <b>layers</b> of abstraction include the <b>OSI</b> ... corollary to this is, &quot;...except for the 
problem of too <b>many layers</b> of indirection. In the seven-<b>layer OSI model</b> of computer networking, the network <b>layer</b> is <b>layer</b> 3
. The network ... In <b>many</b> textbooks and other secondary references, the TCP/IP 
Internet <b>layer</b> is equated with the OSI network <b>layer</b>. ... Text is <b>available</b> under the 
Creative Commons Attribution-ShareAlike License; additional terms may apply. An application <b>layer</b> is an abstraction <b>layer</b> that specifies the shared 
communications protocols ... Although both models use the same term for <b>their</b> 
respective highest level <b>layer</b>, the detailed definitions and purposes are different. 
... In the <b>OSI model</b>, the definition of the application <b>layer</b> is narrower in scope. 
The <b>OSI model</b>&nbsp;... <b>There</b> are <b>many layers</b> not in the <b>OSI model</b>. The most used protocol stack on 
earth does not conform to the OSI stack. LTE and its <b>many</b>&nbsp;... The Internet protocol suite is the conceptual model and set of communications 
protocols used ... The Internet protocol suite predates the <b>OSI model</b>, a more 
comprehensive ... RFC 1122, titled Host Requirements, is structured in 
paragraphs referring to <b>layers</b>, but the document refers to <b>many</b> other 
architectural principles and&nbsp;... X.25 is an ITU-T standard protocol suite for packet-switched data communication 
in wide area ... It also supports functionality not found in the <b>OSI</b> network <b>layer</b>. ... 
X.25 was also <b>available</b> in niche applications such as Retronet that allow vintage 
... X.25 does not specify how the network operates internally – <b>many</b> X.25&nbsp;... The data link <b>layer</b>, or <b>layer</b> 2, is the second <b>layer</b> of the seven-<b>layer OSI model</b> of 
computer ... That transfer can be reliable or unreliable; <b>many</b> data-link protocols 
do not have acknowledgments of successful ... requests from the network <b>layer</b> 
and they perform <b>their</b> function by issuing service requests to the physical <b>layer</b>.
seven
OSI model