Q: TCP/IP Model Lingo
Most CCNA candidates do not get all that excited about reviewing the TCP/IP or OSI models, but it never hurts to review the concepts and terms while practicing for the exam. Today I’ll ask a question that makes you think about the two different versions of the TCP/IP model, to help you review the names of the layers and which layers correlate to the others.
The Question
Consider the popular five-layer version of the TCP/IP model. Which layers from that model have a matching layer, with equivalent functions and identical names, when compared to the original RFC 1122 four-layer TCP/IP model?
A) Application
B) Transport
C) Network
D) Data Link
E) Physical
Answer Post in a Few Days!
I’ll post an answer post in a few days. Watch for it! It should be the next post in chronological order as well, so watch for the link at the bottom of this page (just above the comments section).
I think the two bottom layers got combined
I’ll go with A,B,C and E
RFC 1122 from October 1989 identifies the four layers of the Internet Protocol Suite: Application Layer, Transport Layer, Internet Layer and Link Layer. While I have read that the terms “Internet Layer” and “Network Layer” are used interchangeably, I have also read that use the term “Network Layer” is incorrect as it is a carryover from the 7-layer OSI model; therefore, I would say that only the Application and Transport Layers remain the same between the 4 and 5 layer TCP/IP models
Sorry but what is the correct answer and why? I am very new to the networking world but I want to keep trying to get the CCNA before feb. Thank you.
Hi Joshua,
If you look at the bottom of the post, above the comments, you’ll see a link to the post previous to this one in time, and the post made after this post in time. As a habit, I post two posts about a question: the question post and the answer post. Any time you see a question post, one of those links at the bottom of the page will be to the matching answer post. EG, in this case, look for “A: TCP/IP Model Lingo” link on the lower right of this page, under the post, above the comments.
Same deal on your other similar question.
Application and Transport Layers
A, B
A , B The Application and Transport Layer
The answers are, A, and, B.
A, B are the only answers because C was originally called Internet and D and E comes from the Network Access or Link layer.
It’s B.
A – Application
B – Transport