Discover Top Posts Tagged with #network layer

Explore the Seven Layers of Connectivity in the OSI Model

Unlock the mysteries of the OSI Model! Beginner-friendly guide to understand the layers and functions. Dive into networking fundamentals effortlessly.

Unraveling the OSI model: A symphony of 7 layers that harmonize digital communication. Discover the grand performance. 🎵 #OSIModel

#osi model #network communication #osi model in practice #layered model #data link #network layer #osi layers #internet protocol #data transmission #transport layer #session layer #presentation layer #application layer

OSI Model

OSI Model stands for the Open System Interconnection Model. This model is the model that was published by the ISO "International organization for Standardization" in the 1984. This Model is published just for communication purposes of the different vendors. There were the different devices that manufacturing were different and their pattern of the commination mismatch to each other. So OSI model published for the communication of the different vendors because it is open source so that is the reason this model called the

Open System Interconnection Model.

This Model is known as the theoretical model. This model is classify into the seven layers just for the easy understanding of the networking how the data propagate from sender to the receiver. So following are the seven layers of Open System Interconnection Model:

Fig: OSI Model

Application Layer

Presentation Layer

Session Layer

Transport Layer

Network Layer

Data Link Layer

Physical layer

Application Layer

Application layer is the 7th layer of the OSI Model and if we start the top to bottom then then it will make the 1st layer. So the mainly sequence that mostly common is bottom to top. Application layer is the layer that provide the user interface for user to interact. There are many applications in the computer field and if we see applications are divided into the two types: 1)Computer Application 2)Network Application. We need the network application for the communication and communication is necessary for the resources sharing. There are the multiple protocols that operate on this layer that are the following:

Http that use the port number 80.

Https that use the port number 443.

FTP that use the port number 20-21.

SSH that use the port number 22.

Telnet that use the port number 23.

SMTP that use the port number 25.

TFTP that use the port number 69.

Presentation Layer

Presentation layer is the layer that is the 6th layer of the OSI model and this layer concerns with the presentation of the data. presentation layer is the layer at which encoding of the data and decoding of the data occur and that layers also concerns with the encryption and decryption of the data. Compression and decompression of the data also a part of the presentation layer .

Session Layer

Session layer is the 5th layer of the OSI model and that layer is play an important role for the checking the availability of the destination. That layer is very important layer which is use to establish the session, maintain the session, and the terminating of session. The other main role of this layer is data synchronization of the session streams that are the multiple. This layer work as the dialog controller. This layer is the layer that can directly communicate with presentation layer and the transport layer.

Transport Layer

Transport layer is the layer that is known as the 4th layer of the Open Systems Interconnection Model. This is the layer that concern with the identifying of the service. The main functionality of this layer is Multiplexing and Demultiplexing. The process of segmentation of data also concerns with that layer. Sequencing and reassembling of the data happen on that layer. Flow Control and error correction are also occurring on that layer. TCP transmission control protocol and UDP user datagram protocol work on this layer.

TCP {Reliable, Connection Oriented, Slower than UDP}

UDP{Unreliable, Connectionless, Faster}

Network Layer

Network layer is the 3rd layer of the OSI model and that layer is most common and important layer of the OSI model. That layer is the layer on which our most important and effective device router works. Network layer is the layer that concern with the following :

Logical Addressing

Path Determination

Routing Protocols{RIP, RIPv2, OSPF, BGP, EIGRP}

Routed Protocols {IP, IPX, AppleTalk}

Datalink link Layer

Datalink link layer is the 2nd layer of the OSI model and here switch that is the networking device operate on this layer. Data link layer is the layer that concerns with the local delivery of the frames in between the devices. Here we see the most important protocols that are the following :

HDLC

HDLC stands for the Higher Level Datalink Control Protocol.

Cisco Proprietary.

No support Authentication, compression, and error correction.

PPP

PPP stands for the point to point protocol.

Standard Protocol.

Support Authentication, compression, and error correction.

Physical layer

This layer is the first layer of the OSI model. Physical layer is the layer that concern with the bits transfer of the from one medium to other medium. Hybrid Universal Broadcast device is the device that work on that layer. This layer concerning with how the bit converted into the signals.

#OSI Model #Physical layer #Datalink link Layer #Network Layer #Transport Layer #Session Layer #Presentation Layer #Application Layer

Demystifying the Network Layer: A Core Element of the OSI Model

Explore the critical role of the network layer within the OSI model. This guide breaks down its primary functions, including routing, logical addressing, and packet forwarding, to help you understand how data moves efficiently across interconnected networks. This guide is perfect for individuals new to networking and IT professionals seeking to enhance their fundamental understanding.

#network layer

網路架構與簡介

現在這個時代不管是電腦也好，

手機也好都在使用網路，

何謂區域網路LAN呢？

國際電機電子工程師協會(IEEE, Institute of Electrical ,Electronics, and Engineering)曾經對區域網路給過定義：

區域網路是一個通訊系統，它允許適量彼此無關的電腦在適當的範圍內以適當的傳輸速率進行直接的通訊

常見的網路架構有：

星狀架構

匯流排架構

環狀架構

星狀架構

在星狀架構下有一個中央控制器，所有電腦都直接與它連接，任意兩台電腦的通訊都需經過中央控制器，由於中央集權的緣故，擁有較佳的管理特性，而中央處理器損壞也代表所有電腦間的通訊都將中斷。星狀架構能擴充為雪花狀架構(snowflake)。

匯流排架構

在匯流排架構下所有電腦都經過一條電纜線連接起來，訊號以廣播方式傳送，任意兩台電腦若損壞都不影響…

View On WordPress

#Application Layer #Data Link Layer #Network Layer #OSI七層 #Physical Layer #Presentation Layer #Session Layer #Transport Layer #匯流排架構 #區域網路 #星狀架構 #環狀架構

After data link layer,next layer is network layer.This layer control the operation of sub net.The main task of this layer is to deliver packets from source to destination using multiple networks or links.

What is Network Layer of OSI model?

There are many layers of OSI model as given below

Application Layer

Presentation Layer

Session Layer

Transport Layer

Network Layer

Data-link Layer

Physical Layer

Network Layer:

Suppose two computers/system are connected on the same link,there is no need for a this layer.It control the signal through different medium/channels.It also act as network controller.

#Network Layer #layer #am7s #Physical Layer #computers/system #Data-link Layer

OSI Model (Open Systems Interconnection model)

OSI Model

OSI Model (Open Systems Interconnection model) को ISO (International Organization for Standardization) ने 1984 में Develop किया था। यह एक reference model है, अर्थात real life में इसका कोई उपयोग नहीं होता है। Real life में हम OSI Model के आधार पर बने हुए TCP/IP Model का प्रयोग करते है।

OSI Model यह describe करता है कि किसी नेटवर्क में डेटा या सूचना कैसे send तथा receive होती है। OSI मॉडल…

View On WordPress

#Layer 1 Physical #Layer 2 Data Link #Layer 3 Network #Network Layer #OSI Model (Open Systems Interconnection model)#session Layer – Session Layer OSI Model

7 Networking Layers

The 7 layer burrito of #networking in terms for #developers

Open System Interconnection (OSI) model is a conceptual framework that defines how to implement network protocols. It was developed by the International Standards Organization (ISO) in order to standardize communication functions. The goal is interoperability of different systems through a standard protocol. The concept is based on the work of Charles Bachman at Honeywell Information Services.

View On WordPress

#data frames #data link layer #data packets #internet protocol #network layer #networking #OSI model #packets #PDU #protocol data unit #routing #SDU #service data unit #TCP/IP

CCNA 1 Chapter 6 Network Layer Exam Answers 2017 (v5.1 + v6.0) 1. Which characteristic of the network layer in the OSI model allows carrying packets for multiple types of communications among many hosts? the de-encapsulation of headers from lower layers the selection of paths for and direct packets toward the destination the ability to …

which field in the ipv4 header is used to prevent a packet from traversing a network endlessly?

#network layer