Network and Protocol

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Network and Protocol

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Network and Protocol

  1. 1. NETWORKS AND PROTOCOLS Prepared by Saif Muttair Duhaim saifmtter@yahoo.com
  2. 2. AGENDA • BASICS ABOUT NETWORKS • THREE TYPES OF NETWORK TOPOLOGIES • BASICS ABOUT PROTOCOL • TOW TYPES OF NETWORK PROTOCOLS • ORGANIZATIONS FOR COMMUNICATION STANDARDS
  3. 3. NETWORKS COMPUTER NETWORK A COLLECTION OF COMPUTING DEVICES THAT ARE CONNECTED IN VARIOUS WAYS IN ORDER TO COMMUNICATE AND SHARE RESOURCES USUALLY, THE CONNECTIONS BETWEEN COMPUTERS IN A NETWORK ARE MADE USING PHYSICAL WIRES OR CABLES HOWEVER, SOME CONNECTIONS ARE WIRELESS, USING RADIO WAVES OR INFRARED SIGNALS
  4. 4. Network Topologies There are 3 main types of network topologies: The Ring Network The Bus Network The Star Network
  5. 5. Network Topologies The Ring Network: Computers are connected together to form a ring shape so that none of them is more important than any of the others.
  6. 6. Network Topologies The Bus (or line) Network: Computers are connected like bus stops on a main road. None of them is more important than any of the others.
  7. 7. Network Topologies The Star Network: In a Star topology every node is connected through a central device such as a Hub, Switch or Router
  8. 8. Protocol - Protocol is a set of rules that govern all aspect of data communication between computers on a network. - These rules include guidelines that regulate the following characteristics of a network: access method, allowed physical topologies, types of cabling, and speed of data transfer. A protocol defines what, how, when it communicated.
  9. 9. Common protocol used
  10. 10. Standard Protocol Architectures • Two approaches (standard) 1- OSI Reference model • never used widely • but well known 2- TCP/IP protocol suite • Most widely used
  11. 11. 11 OSI vs. TCP/IP TCP, UDP IP HTTP, SMTP, …
  12. 12. THE OPEN SYSTEMS INTERCONNECTION • THE OSI MODEL DEFINES THE COMMUNICATIONS PROCESS INTO 7 LAYERS, DIVIDING THE TASKS INVOLVED WITH MOVING INFORMATION BETWEEN NETWORKED COMPUTERS INTO SEVEN SMALLER, MORE MANAGEABLE TASK GROUPS.
  13. 13. TCP/IP protocol suite • THE TCP/IP REPRESENTS A SET OF PUBLIC STANDARDS THAT SATISFY HOW PACKETS OF INFORMATION ARE EXCHANGED BETWEEN COMPUTERS OVER ONE AND MORE NETWORKS.
  14. 14. TCP/IP TRANSMISSION CONTROL PROTOCOL (TCP) SOFTWARE THAT BREAKS MESSAGES INTO PACKETS, HANDS THEM OFF TO THE IP SOFTWARE FOR DELIVERY, AND THEN ORDERS AND REASSEMBLES THE PACKETS AT THEIR DESTINATION INTERNET PROTOCOL (IP) SOFTWARE THAT DEALS WITH THE ROUTING OF PACKETS THROUGH THE MAZE OF INTERCONNECTED NETWORKS TO THEIR FINAL DESTINATION
  15. 15. OTHER PROTOCOLS BUILD ON TCP/IP PROTOCOL SUITE SIMPLE MAIL TRANSFER PROTOCOL (SMTP): USED TO SPECIFY TRANSFER OF ELECTRONIC MAIL FILE TRANSFER PROTOCOL (FTP) :ALLOWS A USER TO TRANSFER FILES TO AND FROM ANOTHER COMPUTER TELNET :USED TO LOG ONTO ONE COMPUTER FROM ANOTHER HYPER TEXT TRANSFER PROTOCOL (HTTP): ALLOWS EXCHANGE OF WEB DOCUMENTS
  16. 16. STANDARDS STANDARDS ARE DEVELOPED BY COOPERATION AMONG STANDARDS CREATION COMMITTEES, FORUMS, AND GOVERNMENT REGULATORY AGENCIES.
  17. 17. ORGANIZATIONS FOR COMMUNICATION STANDARDS STANDARDS CREATION COMMITTEES a) INTERNATIONAL STANDARDS ORGANIZATION (ISO) b) INTERNATIONAL TELECOMMUNICATIONS UNION (ITU) c) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) d) INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE) e) ELECTRONIC INDUSTRIES ASSOCIATION (EIA) f) INTERNET ENGINEERING TASK FORCE (IETF)
  18. 18. RESOURCES 1-COMPUTER NETWORKING PRINCIPLES ,PROTOCOLS AND PRACTICE “OLIVIER BONAVENTURE 2011” 2- NETWORK PROTOCOLS HANDBOOK 3- COMMON PROTOCOLS:- HTTP://EN.WIKIBOOKS.ORG/WIKI/NETWORK_PLUS_CERTIFICA TION/TECHNOLOGIES/COMMON_PROTOCOLS

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