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Beer:30 - Network Architecture Review
Beer:30 - Network Architecture Review
Published: 2015/11/13
Channel: SecureState
Lecture 35 Network Architecture
Lecture 35 Network Architecture
Published: 2014/04/19
Channel: thefoainc
What is NETWORK ARCHITECTURE? What does NETWORK ARCHITECTURE mean?
What is NETWORK ARCHITECTURE? What does NETWORK ARCHITECTURE mean?
Published: 2017/03/16
Channel: The Audiopedia
Difference between Network Topology and Architecture
Difference between Network Topology and Architecture
Published: 2016/02/17
Channel: Jain Coaching
Career Connections (2015)  Network Architect
Career Connections (2015) Network Architect
Published: 2015/09/02
Channel: woubpbs
Computer Networking Tutorial - 4 - OSI Model  Physical Layer
Computer Networking Tutorial - 4 - OSI Model Physical Layer
Published: 2009/02/14
Channel: thenewboston
Cisco Digital Network Architecture Overview
Cisco Digital Network Architecture Overview
Published: 2016/03/02
Channel: Cisco
Computer Network Architect
Computer Network Architect
Published: 2016/04/25
Channel: Richie Mercedes
TechWiseTV: Digital Network Architecture, Part I: The Design
TechWiseTV: Digital Network Architecture, Part I: The Design
Published: 2016/03/08
Channel: Cisco
Hierarchical Network Design
Hierarchical Network Design
Published: 2016/03/15
Channel: ciscoKim
Enterprise Network Overview
Enterprise Network Overview
Published: 2013/05/30
Channel: Ed Gastle
005 - ICND1 - 100 - 105 - IP Fundamentals - Network Architecture - Three Tier vs Collapsed Core
005 - ICND1 - 100 - 105 - IP Fundamentals - Network Architecture - Three Tier vs Collapsed Core
Published: 2017/02/07
Channel: Rob Riker
3G vs. LTE Network Architecture - SixtySec
3G vs. LTE Network Architecture - SixtySec
Published: 2012/05/04
Channel: ExploreGate
Cisco UCS Networking, Physical network architecture
Cisco UCS Networking, Physical network architecture
Published: 2011/03/08
Channel: Brad Hedlund
Module 4 - 4G LTE & EPC Network Architecture
Module 4 - 4G LTE & EPC Network Architecture
Published: 2013/06/13
Channel: ClearModule
Network Security Architecture - Part 1
Network Security Architecture - Part 1
Published: 2012/07/31
Channel: DSMSYSTEMS
SS7 Network Architecture
SS7 Network Architecture
Published: 2016/09/18
Channel: TELCOMA Training
5G - Network Architecture in the Networked Society
5G - Network Architecture in the Networked Society
Published: 2015/02/27
Channel: Ericsson
Cisco Digital Network Architecture
Cisco Digital Network Architecture
Published: 2016/10/31
Channel: Cisco
Cisco Digital Network Architecture (DNA)
Cisco Digital Network Architecture (DNA)
Published: 2016/11/15
Channel: Cisco
Application Layer: Network Application Architecture
Application Layer: Network Application Architecture
Published: 2013/06/24
Channel: Scholartica Channel
3-2-1 Data Center Network Architecture
3-2-1 Data Center Network Architecture
Published: 2010/11/12
Channel: JuniperNetworks
LAYERED NETWORK ARCHITECTURE,PROTOCOL ARCHITECTURE,TRANSMISSION MODE
LAYERED NETWORK ARCHITECTURE,PROTOCOL ARCHITECTURE,TRANSMISSION MODE
Published: 2017/02/24
Channel: IP University CSE/IT
Cisco Digital Network Architecture Security
Cisco Digital Network Architecture Security
Published: 2017/03/07
Channel: Cisco
NAF Comparing Types of Network Architecture
NAF Comparing Types of Network Architecture
Published: 2015/10/05
Channel: Elaine Vallery
Cisco Digital Network Architecture (DNA)
Cisco Digital Network Architecture (DNA)
Published: 2017/04/12
Channel: Cisco
11 - Network architecture of CCTV IP systems - Dallmeier CCTV IP Academy
11 - Network architecture of CCTV IP systems - Dallmeier CCTV IP Academy
Published: 2011/03/16
Channel: Dallmeier Electronic GmbH & Co. KG
Cisco Digital Network Architecture (DNA) for Retail
Cisco Digital Network Architecture (DNA) for Retail
Published: 2017/04/27
Channel: Cisco
Rob Soderbery on the Cisco Digital Network (DNA) Architecture
Rob Soderbery on the Cisco Digital Network (DNA) Architecture
Published: 2016/03/01
Channel: Cisco
Online Course - Networking Protocols - Episode3 - Network Protocol Stack Design and Architecture
Online Course - Networking Protocols - Episode3 - Network Protocol Stack Design and Architecture
Published: 2016/02/07
Channel: The Linux Channel
Cisco Digital Network Architecture Introduction with Liad Ofek
Cisco Digital Network Architecture Introduction with Liad Ofek
Published: 2017/02/23
Channel: Tech Field Day
Zero Trust Network Architecture with John Kindervag
Zero Trust Network Architecture with John Kindervag
Published: 2012/07/30
Channel: Palo Alto Networks
Paper presentation on 5G Network Architecture
Paper presentation on 5G Network Architecture
Published: 2015/10/23
Channel: Chetan Rathi
2-Tier vs 3-Tier Campus Network Architecture
2-Tier vs 3-Tier Campus Network Architecture
Published: 2017/01/13
Channel: Stratus Networks
Cisco Digital Network Architecture (DNA) for Education
Cisco Digital Network Architecture (DNA) for Education
Published: 2017/01/31
Channel: Cisco
The Intelligent Information Network and Cisco Service-Oriented Network Architecture - Part 1
The Intelligent Information Network and Cisco Service-Oriented Network Architecture - Part 1
Published: 2016/09/12
Channel: The Cisco Learning Network
How to Manage a Cisco internetwork? | What is Network Architecture? | CCNA Routing and Switching
How to Manage a Cisco internetwork? | What is Network Architecture? | CCNA Routing and Switching
Published: 2014/11/14
Channel: Simplilearn
Cisco Digital Network Architecture Introduction with Jeff Reed
Cisco Digital Network Architecture Introduction with Jeff Reed
Published: 2016/05/09
Channel: Tech Field Day
Cisco Digital Network Architecture Virtualization
Cisco Digital Network Architecture Virtualization
Published: 2017/03/07
Channel: Cisco
Sigfox  Network  Architecture
Sigfox Network Architecture
Published: 2016/11/18
Channel: SIGFOX
LTE Network Architecture Webinar - AIRCOM International
LTE Network Architecture Webinar - AIRCOM International
Published: 2013/09/24
Channel: TEOCO
Linux Kernel Networking Sub-system - part1 - Intro, Architecture
Linux Kernel Networking Sub-system - part1 - Intro, Architecture
Published: 2015/09/25
Channel: The Linux Channel
Network Architecture 101 - Expert Knowledge Series
Network Architecture 101 - Expert Knowledge Series
Published: 2015/08/05
Channel: Citizen Academy
Avaya Virtual Enterprise Network Architecture
Avaya Virtual Enterprise Network Architecture
Published: 2012/07/19
Channel: Avaya
Tactical Undersea Network Architecture (TUNA) - Phase 1 Completed
Tactical Undersea Network Architecture (TUNA) - Phase 1 Completed
Published: 2017/01/05
Channel: DARPAtv
Lecture 17: Network Architecture [Android 2016]
Lecture 17: Network Architecture [Android 2016]
Published: 2016/11/04
Channel: CS 4530 - Mobile Application Programming
SDN/NFV: Presentation by BT
SDN/NFV: Presentation by BT's Chief Network Architect Neil McRae
Published: 2014/12/15
Channel: European Communications
learn computer in hindi- networking architecture-1
learn computer in hindi- networking architecture-1
Published: 2017/04/03
Channel: neeta sharma
APJ Cisco Digital Network Architecture (DNA) - Deakin University
APJ Cisco Digital Network Architecture (DNA) - Deakin University
Published: 2016/04/07
Channel: Cisco
Virtualization for 5G Network Architecture
Virtualization for 5G Network Architecture
Published: 2016/05/31
Channel: MetanoiaInc
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Network architecture is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats use. This concept was brought by Shreyas Dhakal In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.

The network architecture of the Internet is predominantly expressed by its use of the Internet Protocol Suite, rather than a specific model for interconnecting networks or nodes in the network, or the usage of specific types of hardware links.

OSI network model[edit]

 The Open Systems Interconnection model (OSI model) is a product of the Open Systems Interconnection effort at the International Organization for Standardisation (ISO) . It is a way of sub-dividing a communications system further into smaller parts called layers. A layer is a collection of similar functions that provide services to the layer above it and receives services from the layer below it. On each layer, an instance provides services to the instances at the layer above and requests service from the layer below.

Physical layer[edit]

The physical layer defines the electrical and physical specifications for devices. In particular, it defines the relationship between a device and a transmission medium, such as a copper or optical cable. This includes the layout of pins, voltages, cable specifications, hubs, repeaters, network adapters, host bus adapters (HBA used in storage area networks) and more. Its main task is the transmission of a stream of bits over a communication channel.

Data-linking layer[edit]

The data link layer provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the physical layer. Originally, this layer was intended for point-to-point and point-to-multipoint media, characteristic of wide area media in the telephone system. Local area network architecture, which included broadcast-capable multi-access media, was developed independently of the ISO work in IEEE Project 802. IEEE work assumed sublayering and management functions not required for WAN use. In modern practice, only error detection, not flow control using sliding window, is present in data link protocols such as Point-to-Point Protocol (PPP), and, on local area networks, the IEEE 802.2 LLC layer is not used for most protocols on the Ethernet, and on other local area networks, its flow control and acknowledgment mechanisms are rarely used. Sliding-window flow control and acknowledgment is used at the transport layer by protocols such as TCP, but is still used in niches where X.25 offers performance advantages. Simply, its main job is to create and recognize the frame boundary. This can be done by attaching special bit patterns to the beginning and the end of the frame. The input data is broken up into frames.

Network layer[edit]

The network layer provides the functional and procedural means of transferring variable length data sequences from a source host on one network to a destination host on a different network, while maintaining the quality of service requested by the transport layer (in contrast to the data link layer which connects hosts within the same network). The network layer performs network routing functions, and might also perform fragmentation and reassembly, and report delivery errors. Routers operate at this layer—sending data throughout the extended network and making the Internet possible. This is a logical addressing scheme; values are chosen by the network engineer. The addressing scheme is not hierarchical. It controls the operation of the subnet and determine the routing strategies between IMP and ensures that all the packs are correctly received at the destination in the proper order.

Transport layer[edit]

The transport layer provides transparent transfer of data between end users, providing reliable data transfer services to the upper layers. The transport layer controls the reliability of a given link through flow control, segmentation/desegmentation, and error control. Some protocols are state and connection oriented. This means that the transport layer can keep track of the segments and re-transmit those that fail. The transport layer also provides the acknowledgement of the successful data transmission and sends the next data if no errors occurred. Some transport layer protocols (such as TCP, but not UDP) support virtual circuits that provide connection-oriented communication over an underlying packet-oriented data-gram network, where it assures the delivery of packets in the order in which they were sent and that they are free of errors. The data-gram transportation deliver the packets randomly and broadcast it to multiple nodes.

The transport layer multiplexes several streams on to one physical channel. The transport headers indicate which message belongs to which connection.

Session layer[edit]

This layer provides a user interface to the network where the user negotiates to establish a connection. The user must provide the remote address to be contacted. The operation of setting up a session between two processes is known as "binding". In some protocols, it is merged with the transport layer. Its main work is to transfer data from the other application to this application so this application is mainly used for transferred layer.

Presentation layer[edit]

The presentation layer establishes context between entities on the application layer, in which the higher-layer entities may use different syntax and semantics if the presentation service provides a mapping between them. If a mapping is available, presentation service data units are encapsulated into session protocol data units, and passed down the stack. This layer provides independence from data representation (e.g. encryption) by translating between application and network formats. The presentation layer transforms data into the form that the application accepts. This layer formats and encrypts data to be sent across a network. It is sometimes called the syntax layer.[citation needed] The original presentation structure used the basic encoding rules of Abstract Syntax Notation One (ASSN), with capabilities such as converting an BODICE-coded text file to an ASCII-coded file, or serialization of objects and other data structures from and to XML.

Application layer[edit]

The application layer is the OSI layer closest to the end user, which means that both the OSI application layer and the user interact directly with the software application. This layer interacts with software applications that implement a communicating component. Such application programs fall outside the scope of the OSI model. Application layer functions typically include identifying communication partners, determining resource availability, and synchronizing communication. When identifying communication partners, the application layer determines the identity and availability of communication partners for an application with data to transmit.

Distributed computing[edit]

In distinct usage in distributed computing, the term "network architecture" often describes the structure and classification of a distributed application architecture, as the participating nodes in a distributed application are often referred to as a "network". For example, the applications architecture of the public switched telephone network (PSTN) has been termed the Advanced Intelligent Network. There are any number of specific classifications but all lie on a continuum between the dumb network (e.g. Internet) and the intelligent computer network (e.g. the telephone network). Other networks contain various elements of these two classical types to make them suitable for various types of applications. Recently the context aware network, which is a synthesis of two, has gained much interest with its ability to combine the best elements of both.

A popular example of such usage of the term in distributed applications, as well as PVCs (permanent virtual circuits), is the organization of nodes in peer-to-peer (P2P) services and networks. P2P networks usually implement overlay networks running over an underlying physical or logical network. These overlay network may implement certain organizational structures of the nodes according to several distinct models, the network architecture of the system.

Network architecture is a broad plan that specifies everything necessary for two application programs on different networks on an Internet to be able to work together effectively.

References[edit]

External links[edit]

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