Computer network: is a set of devices connected through links. A node can be a computer, printer, or any other device capable of sending or receiving the data.
OSI stands for Open System Interconnection is a reference model that describes how information from a software application in one computer moves through a physical medium to the software application in another computer.
OSI consists of Seven Layers, and each layer performs a particular network function.
Characteristics of OSI Model:
The OSI model is divided into two layers: upper layers and lower layers.
Functions of the OSI Layers
There are seven OSI layers. Each layer has different functions. A list of seven layers are given below:
Physical Layer
Data-Link Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application Layer
Physical layer: The main functionality of the physical layer is to transmit the individual bits from one node to another node. It is the lowest layer of the OSI model.
Functions of a Physical layer: Line Configuration, Data Transmission, Topology, Signals.
Functions of the Data-link layer: Physical Addressing, Flow Control, Error Control, Access Control.
Functions of Network Layer: Internetworking, Addressing, Routing, Packetizing.
Functions of Transport Layer: Service-point addressing, Segmentation, and reassembly, Connection Control, Flow control error control.
Functions of Session layer: Dialog control, Synchronization
Functions of Presentation layer: Translation, Encryption, Compression:
Functions of Application layer: File transfer, access, and management (FTAM), Mail services
WHAT'S COVERED?
In these practice tests, we've included all very important questions of 7 layers OSI model in computer Networks:
Physical Layer
Data-Link Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application Layer
✡What Makes This Course Special✡
✔ 3 FULL practice tests, 90 questions total
✔ Fast & Friendly Support in the Q&A section.
✔30 days money-back guarantee. Without any queries.
✔ Lifetime Access to course updates.
✔Lifetime support.
COURSE DETAILS:
CompTIA Network+ Certification Exam OSI Layers Practice Test: Practice Tests for all Exams. It is divided into three Tests.
↪ 7 layers OSI Model Practice Test- Set1
30 questions | 15 minutes | 70% correct required to pass | Multiple-Choice Questions
↪ 7 layers OSI Model Practice Test- Set2
30 questions | 15 minutes | 70% correct required to pass | Multiple-Choice Questions
↪ 7 layers OSI Model Practice Test- Set3
21 questions | 10 minutes | 70% correct required to pass | Multiple-Choice Questions
✡WHAT MAKES THIS COURSE SPECIAL✡
✔ Fast & Friendly Support in the Q&A section.
✔30 days money-back guarantee. Without any queries.
✔ Lifetime Access to course updates.
✔Lifetime support.
Key features of practice sections and model test:
➠You can pause the test at any time and resume later.
➠You can retake the test as many times as you would like.
➠The progress bar at the top of the screen will show your progress as well as the time remaining in the test. If you run out of time, don’t worry; you will still be able to finish the test.
➠You can skip a question to come back to at the end of the exam.
➠You can also use “Mark for Review” to come back to questions you are unsure about before you submit your test.
➠If you want to finish the test and see your results immediately, press the stop button.
!!!Best of luck!!!✍
Note: These questions are only for practice and understanding level of knowledge. It is not necessary that these questions may or may not appear for examinations and/or interview questions, but you will get Exams from these questions for sure.
