Chapter 1 Course Introduction and Overview

210 views
163 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
210
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
4
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Chapter 1 Course Introduction and Overview

  1. 1. Week 1 <ul><li>Course overview </li></ul>
  2. 2. Learning objectives <ul><li>Network basics </li></ul><ul><ul><li>A classification </li></ul></ul><ul><ul><li>The component view </li></ul></ul><ul><ul><li>The layer view </li></ul></ul><ul><li>Importance of networking in organizations and related jobs </li></ul><ul><li>Network design process and challenges </li></ul><ul><li>Application exercise </li></ul>
  3. 3. Networks <ul><li>Group of computers or other devices connected by some type of transmission media </li></ul><ul><li>Can be small or large: LAN, MAN, WAN, BBN. </li></ul><ul><li>Internet, intranet and extranet </li></ul><ul><li>Two possible views: </li></ul><ul><ul><li>The component view </li></ul></ul><ul><ul><li>The layer view </li></ul></ul>
  4. 4. Components of Networks <ul><li>Hardware: </li></ul><ul><ul><li>Computers: </li></ul></ul><ul><ul><ul><li>Clients/servers; peer-to-peer networks; mainframe/terminals </li></ul></ul></ul><ul><ul><ul><li>Different types of servers and different types of clients </li></ul></ul></ul><ul><ul><li>Connectivity devices: </li></ul></ul><ul><ul><ul><li>For a LAN: NIC, repeater, hub, switch… </li></ul></ul></ul><ul><ul><ul><li>To interconnect LANs: Bridge, switch, router, gateway… </li></ul></ul></ul><ul><ul><li>Transmission media (AKA circuits): guided versus wireless </li></ul></ul><ul><ul><li>Other: Printers, connectors, storage devices, print servers… </li></ul></ul><ul><li>Software: </li></ul><ul><ul><li>Application softwares </li></ul></ul><ul><ul><li>Network Operating Systems </li></ul></ul><ul><ul><li>Protocols (See next slide) </li></ul></ul><ul><ul><ul><li>Agreed upon rules for transmitting data between 2 devices </li></ul></ul></ul><ul><ul><ul><li>Some of these rules are handled by hardware (physical layer) </li></ul></ul></ul>
  5. 5. Multi-layer view of networks <ul><li>Models that reduce the complexity of data communication between computers </li></ul><ul><li>Modular approach: </li></ul><ul><ul><li>The process of transferring data is divided into layers </li></ul></ul><ul><ul><li>Each layer handles specific sub-tasks with specific protocols </li></ul></ul><ul><li>Communication occurs: </li></ul><ul><ul><li>Between different layers on the same system </li></ul></ul><ul><ul><li>Between similar layers on different systems </li></ul></ul><ul><ul><li>See slide # 10 </li></ul></ul>
  6. 6. OSI and course overview
  7. 7. Application Layers <ul><li>Handle the user’s connection to the network </li></ul><ul><li>Include: </li></ul><ul><ul><li>7. Application : Allows 2 application programs on separate computers to work together (HTTP, SMTP, SNMP) </li></ul></ul><ul><ul><li>6. Presentation : Formats data for presentation to user (translation between data formats, encryption, compression) </li></ul></ul><ul><ul><li>5. Session : Initiates, maintains and terminates each session between sender and receiver (synchronizes transmission and restarts it in case of interruption) </li></ul></ul>
  8. 8. Internetwork Layers <ul><li>Move messages from one network to another (no direct relationship between sender and receiver) </li></ul><ul><li>Include: </li></ul><ul><ul><li>4. Transport : Segments message if necessary and ensures that all segments have been received and in sequence </li></ul></ul><ul><ul><li>3. Network : Makes routing decisions </li></ul></ul>
  9. 9. Hardware Layers <ul><li>Move messages from one computer (or device) to another </li></ul><ul><li>Include: </li></ul><ul><ul><li>2. Data Link : Deals with message delineation, error control and network medium access control </li></ul></ul><ul><ul><li>1. Physical : Defines how to represent individual bits and the connectors to be used. </li></ul></ul>
  10. 10. Message transmission using layers
  11. 11. Why do organizations need networks?
  12. 12. Networking jobs and certifications <ul><li>Network Designer (or Architect) </li></ul><ul><ul><li>Responsibilties: Architecture of networks to be built/upgraded/expanded </li></ul></ul><ul><ul><li>Knowledge: Networking basics, business needs and products available </li></ul></ul><ul><ul><li>Certifications: Cisco network designer stream </li></ul></ul><ul><li>Network (or System) Administrator </li></ul><ul><ul><li>Responsibilities: Daily operations (managing equipment & trouble shooting) </li></ul></ul><ul><ul><li>Knowledge: Networking basics, configuration of NOS & equipment, trouble shooting </li></ul></ul><ul><ul><li>Certifications: Cisco network administration stream; Network+; MCSE;CNE </li></ul></ul><ul><li>Other related jobs: Database administrator, email administrator…. </li></ul>
  13. 13. Network challenges <ul><li>Meeting users’ needs! </li></ul><ul><li>Peformance </li></ul><ul><li>Cost effectiveness </li></ul><ul><li>Compatibility between equipment from different vendors (Role of standards!) </li></ul><ul><li>Security and Maintenance </li></ul>
  14. 14. Network Design Process <ul><li>Need Analysis:Specs of user requirements </li></ul><ul><ul><li>Capacity (response time) </li></ul></ul><ul><ul><li>Applications supported </li></ul></ul><ul><ul><li>Security </li></ul></ul><ul><li>Technology Design: </li></ul><ul><ul><li>Clients and servers </li></ul></ul><ul><ul><li>Circuits and devices </li></ul></ul><ul><li>Cost assessment: </li></ul><ul><ul><li>How can this be done? </li></ul></ul>
  15. 15. Reaching a final network design
  16. 16. Thank you

×