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TCP /IP Model

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Questions and Answers

What is the primary concern at the Internet layer of the TCP/IP model?

Formatting data and setting up sessions

Getting bits on the wire with network cabling

Mac addresses and Ethernet switches

IP addressing and routers (correct)

What is the main function of the transport layer in the TCP/IP model?

Formatting data for application use

Getting data on the wire with network cabling

Routing data between networks

Providing reliable data transfer through protocols like TCP and UDP (correct)

What is the term used to describe the layer of the TCP/IP model where Mac addresses and Ethernet switches are used?

Internet layer

Application layer

Data link layer

Network interface layer (correct)

What is the primary function of the physical layer of the TCP/IP model?

Getting bits on the wire with network cabling or fiber optic cabling Signup and view all the answers

What is the term used to describe the layer of the TCP/IP model where DNS, Http, and Smtp operate?

Application layer Signup and view all the answers

What is the main reason why there are different versions of the TCP/IP model?

The model is still evolving and being refined Signup and view all the answers

What was the primary contender for IP addresses when the OSI model was first developed?

Other protocols Signup and view all the answers

What is the main difference between the OSI model and the TCP IP model?

The OSI model groups the top three layers together Signup and view all the answers

What is the name of the layer in the TCP IP model that combines the physical and data link layers of the OSI model?

Network access layer Signup and view all the answers

What is the name of the layer in the TCP IP model that is similar to the transport layer in the OSI model?

Transport layer Signup and view all the answers

What is a common variation of the TCP IP model?

A 5-layer model Signup and view all the answers

What is the name of the layer in some variants of the 5-layer TCP IP model that is similar to the data link layer in the OSI model?

Link layer Signup and view all the answers

What is the main challenge with the TCP IP model?

Literature has different takes on it Signup and view all the answers

What is the name of the layer in the TCP IP model that combines the session, presentation, and application layers of the OSI model?

Application layer Signup and view all the answers

Study Notes

OSI Model vs TCP/IP Model

The OSI model categorizes network functions and devices into 7 layers
The TCP/IP model groups the top 3 layers of the OSI model (session, presentation, and application) into a single application layer

Key Features of the TCP/IP Model

Combines physical and data link layers of the OSI model into a single network access layer
Renames the network layer as the Internet layer
Transport layer keeps its name
Application layer groups together session, presentation, and application layers

Variants of the TCP/IP Model

4-layer model: combines physical and data link layers into a single network access layer
5-layer model: keeps physical and data link layer names from the OSI model
Alternative names for layers: network interface layer, link layer, network access layer

Key Concepts

Physical layer: concerns getting bits on the wire with network cabling or fiber optic cabling
Internet layer: concerns IP addressing, where routers live
Transport layer: concerns TCP and UDP protocols
Application layer: concerns formatting data, setting up/maintaining/tearing down sessions, and applications themselves (e.g. DNS, HTTP, SMTP)

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