Hi admin, one of my friend has referred you guys, i got exam on 22nd June 2020 from 10:00 am to 11:30 am. i will be sending you the direct exam file on 22nd @ 10:00 am. and i want the file to be completed by 11:30 am. i have attached the description of subject and all lecture slides. please have look and get back to be.Thanks and RegardsSalman Khan.
ITNE3006.pdf Lesson_01 Lecture.pdf ITNE3006 Session 1 1Copyright © 2018 VIT, All Rights Reserved Copyright © 2015 - 2018, Victorian Institute of Technology. The contents contained in this document may not be reproduced in any form or by any means, without the written permission of VIT, other than for the purpose for which it has been supplied. VIT and its logo are trademarks of Victorian Institute of Technology. ITNE3006 Design Network Infrastructure ITNE3006 Session 1 2Copyright © 2018 VIT, All Rights Reserved Copyright © 2015 - 2018, Victorian Institute of Technology. The contents contained in this document may not be reproduced in any form or by any means, without the written permission of VIT, other than for the purpose for which it has been supplied. VIT and its logo are trademarks of Victorian Institute of Technology. Lesson 1 Network Design ITNE3006 Session 1 3Copyright © 2018 VIT, All Rights Reserved Overview • Introduction to Network • A Good Network Design • Design Principles • Network Designing Tasks • Modular Network Design ITNE3006 Session 1 4Copyright © 2018 VIT, All Rights Reserved Introduction To Network Network provide the ability for people or devices to communicate with each other. Data Network: Network that allows computers to exchange data. Eg. Two PCs connected through a cable. Internetwork: A collection of individual networks that are connected by networking devices and that function as a single large network. E.g. Internet The first networks were LANS: Multiple users in relatively small geographical area to exchange files and messages and to access shared resources.WANs were introduced to interconnect these LANS so that geographically dispersed users could also share information. ITNE3006 Session 1 5Copyright © 2018 VIT, All Rights Reserved A Good Network Design Design: The plan of creating something. DESIGN→ Creativity & Skills+ Existing Structure and Use + Requirements. A Good Network Design includes • Understanding the requirements • Understanding the existing structure • Understanding how the features operate • Understanding the operational constraints • Understanding the alternative approaches ITNE3006 Session 1 6Copyright © 2018 VIT, All Rights Reserved Design Principles PDIOO Network Life Cycle: Network Lifecycle to describe the multiple phases through which a network passes. P Plan D Design I Implement O Operate O Optimize R Retirement ITNE3006 Session 1 7Copyright © 2018 VIT, All Rights Reserved Design Principles • Plan Phase- The detailed network requirements are identified, and the existing network is reviewed. • Design Phase- The network is designed according to the initial requirements and additional data gathered during analysis of the existing network. • Implement Phase- The network is built according to the approved design. • Operate Phase- The network is operational and is being monitored. This phase is the ultimate test of the design. ITNE3006 Session 1 8Copyright © 2018 VIT, All Rights Reserved Design Principles - Continued • Optimize phase- During this phase, issues are detected and corrected , either before problems arise or, if no problems are found, after a failure has occurred. Redesign must be required if so many problems exists. • Retirement Phase- Although not part of the PDIOO acronym, this phase is necessary when part of the network is outdated or is no longer required. ITNE3006 Session 1 9Copyright © 2018 VIT, All Rights Reserved Design Principles Network Designing should include the following tasks. • Determine Requirements • Analyze the existing network, if one exists • Prepare the preliminary design • Complete the final design development • Deploy the network • Monitor and Redesign if necessary • Maintain Documentation ITNE3006 Session 1 10Copyright © 2018 VIT, All Rights Reserved Design Principles Figure. Network Design is an Ongoing Process ITNE3006 Session 1 11Copyright © 2018 VIT, All Rights Reserved Network Designing Tasks 1. Determining Requirements Many types of requirements must be considered, including the Technical and Business issues. Technical Requirements • Applications that are to run on the network • Internet connections required • Addressing restrictions • Support for IPv6 • Other protocols that are to run on the network • Cabling Requirements ITNE3006 Session 1 12Copyright © 2018 VIT, All Rights Reserved • Redundancy Requirements • Use of proprietary equipment protocols • Existing equipment that must be supported • Network services required (QoS, Wireless etc.) • Integration of security • Solutions required for voice traffic, content networking, storage networking etc. • Network Management • Support for existing applications • Bandwidth Availability Network Designing Tasks 1 ITNE3006 Session 1 13Copyright © 2018 VIT, All Rights Reserved Network Designing Tasks - 1 Business Requirements • Budget • Schedule • People • Legal • History • Policies Extracting Requirements is a difficult task. At the end of the project, you should easily be able to determine whether a requirement has been met. ITNE3006 Session 1 14Copyright © 2018 VIT, All Rights Reserved Network Designing Task - 2 2. Analyzing the Existing Network An existing network may restrict the network design in some manner Because • Existing cabling might not be optimal, but have to be kept for cost reasons • VPN portion might not have to be changed Network information can be obtained through • Commands (e.g. show version in Cisco IOS) • Protocol Analyzers • Network Analyzers ITNE3006 Session 1 15Copyright © 2018 VIT, All Rights Reserved Network Designing Task - 3 3. Preparing the Preliminary Design • Preliminary design involves considering all the network requirements and constraints, and determining the viable alternative solution. • After alternative solutions have been developed, the optimal solution must be chosen. • A top down approach is recommended for the network design. Top down approach: Requirement are considered first, with the applications and network solutions that will run on the network driving the design. Bottom up approach: First select devices, features, cabling and so on and then try to fit the applications onto this network. ITNE3006 Session 1 16Copyright © 2018 VIT, All Rights Reserved Network Designing Tasks - 4 4. Completing the Final Design Development Developing final design involves • Producing detailed drawings • Configuration Specification Costing • Addressing Plans • Other required information for implementation. ITNE3006 Session 1 17Copyright © 2018 VIT, All Rights Reserved Network Designing Tasks - 5 5. Deploying the Network The deployment plan should include • Details of what is to be done • Details of how is to be done • Scheduling • Contingency Plans • Testing • Any training for the personnel if required • Negotiate any contracts • Documentation ITNE3006 Session 1 18Copyright © 2018 VIT, All Rights Reserved Network Designing Tasks - 6 6. Monitoring And Redesigning • Gather operational statistics • Monitor for anomalies and problems • Redesign if required for the entire portion of the network • Monitoring and redesign occur at the OO phase of PDIOO ITNE3006 Session 1 19Copyright © 2018 VIT, All Rights Reserved Network Designing Tasks - 7 7. Maintaining Design Documentation The design should be documented throughout the process. Documentation should include • All the agreed to requirements and constraints • The state of existing network, if any • Preliminary design options and brief review of why final design was chosen • Final design details • Results of any pilot or prototype testing • Deplyment plans, schedules, and other implementation details • Monitoring requirements • Any other pertinent information ITNE3006 Session 1 20Copyright © 2018 VIT, All Rights Reserved Modular Network Design A module is a component of a composite structure. Modular Network Design involves creating modules that can then put together to meet the requirements of the entire network. Modular Network- Benefits • It is easier to understand and design smaller, simpler modules rather than an entire network. • Easier to troubleshoot smaller elements compared to the entire network • The reuse of blocks saves design time and effort, as well as implementation time and effort. • The reuse of blocks allows the network to grow more easily, providing network scalability. ITNE3006 Session 1 21Copyright © 2018 VIT, All Rights Reserved Modular Network Design Modular Network- Benefits – Cont. • It is easier to change modules rather than the entire network, providing flexibility of design. Examples of Modular Network Designs are 1. Hierarchical Network Design 2. Cisco Enterprise Composite Network Model. ITNE3006 Session 1 22Copyright © 2018 VIT, All Rights Reserved Hierarchical Network Design The Hierarchical Network Design model separates the network into three functions. Access Layer: Provides user and workgroup access to the resources of the network. Distribution Layer: Implements the organizations policies and provides connections between workgroups and between workgroups and the core. Core Layer: Provides high speed transport between distribution- layer devices and to core resources. ITNE3006 Session 1 23Copyright © 2018 VIT, All Rights Reserved Hierarchical Network Design Figure. Hierarchial Network Design Model as Mapped to a Simple Network ITNE3006 Session 1 24Copyright © 2018 VIT, All Rights Reserved Hierarchical Network Design - Distribution Layer The distribution layer interfaces between the core and access layers, and between access layer workgroups. The distribution layer functions and characteristics include the following: • Implementing policies by filtering, and prioritizing and queuing traffic. • Routing between the access and core layers. If different routing protocols are implemented at these other two layers, the distribution layer is responsible for redistributing among the routing protocols, and filtering if necessary. • Performing route summarization. When routes are summarized, routers have only summary routes in their routing tables, instead of unnecessary detailed routes. ITNE3006 Session 1 25Copyright © 2018 VIT, All Rights Reserved Hierarchical Network Design - Distribution Layer • Providing redundant connections, both to access devices and to core devices. • Aggregating multiple lower-speed access connections into higher- speed core connections and converting between different media types (for example, between Ethernet and Frame Relay connections), if necessary. ITNE3006 Session 1 26Copyright © 2018 VIT, All Rights Reserved Hierarchical Network Design - Access Layer The access layer is where users access the network. • Users can be local or remote. • Local users typically access the network through connections to a hub or a switch. • Switches operate at Layer 2, and each port on a switch is its own collision domain, meaning that multiple conversations between devices connected through the switch can be happening simultaneously. • Using a LAN switch rather than a hub has a performance advantage. • Remote users might access the network through the Internet, using VPN connections, for example • The access layer must also ensure that only users who are authorized to access the network are admitted. ITNE3006 Session 1 27Copyright © 2018 VIT, All Rights Reserved Hierarchical Network Design - Core Layer The core layer provides a high-speed backbone. Functions and attributes of the core layer include the following: • Providing high-speed, low-latency links and devices for quick transport of data across the backbone. • Providing a highly reliable and available backbone. This is accomplished by implementing redundancy in both devices and links so that