Lecture 34 E Commerce Infrastructure The Internet Web

Lecture : 3+4 E -Commerce Infrastructure: The Internet, Web, and Mobile Platform

Figure shows: How messages are broken into packets 1 8

(2)Internet protocols ( )ﺑﺮﻭﺗﻮﻛﻮﻻﺕ ﺍﻻﻧﺘﺮﻧﺖ Protocols are the language of communication between Internet devices and networks. It is a set of rules and standards programmed to describe the language of communication and how to communicate between devices over the network. ﻭﻫﻲ ﻋﺒﺎﺭﺓ ﻋﻦ. ﺍﻟﺒﺮﻭﺗﻮﻛﻮﻻﺕ ﻫﻲ ﻟﻐﺔ ﺍﻟﺘﺨﺎﻃﺐ ﺑﻴﻦ ﺍﺟﻬﺰﺓ ﻭﺷﺒﻜﺎﺕ ﺍﻻﻧﺘﺮﻧﺖ ﻣﺠﻤﻮﻋﺔ ﻣﻦ ﺍﻟﻘﻮﺍﻧﻴﻴﻦ ﻭﺍﻟﻤﻘﺎﻳﻴﺲ ﺍﻟﻤﺒﺮﻣﺠﺔ ﻟﺘﻮﺻﻴﻒ ﻟﻐﺔ ﺍﻟﺘﺨﺎﻃﺐ ﻭﻛﻴﻔﻴﺔ ﺍﻻﺗﺼﺎﻝ . ﺑﻴﻦ ﺍﻻﺟﻬﺰﺓ ﻋﺒﺮ ﺍﻟﺸﺒﻜﺔ -Protocol: a set of rules formatting, ordering, compressing and error-checking messages. 1 9

The types of Routable Protocols (TCP/IP) protocols This group contains several protocols, the most important of which are: 1 - (TCP) : Transmission Control Protocol ﺑﺮﻭﺗﻮﻛﻮﻝ ﺍﻟﺘﺤﻜﻢ ﺑﺎﻟﻨﻘﻞ 2 - (IP) : Internet Protocol ﺑﺮﻭﺗﻮﻛﻮﻝ ﺍﻻﻧﺘﺮﻧﺖ • TCP/IP is divided into 4 layers: 1 - Network Interface Layer 2 - Internet Layer 3 - Transport Layer 4 - Application Layer 1 11

TCP/IP Architecture and Protocol Suite ﺍﻟﻤﻌﻤﺎﺭﻳﺔ ﻭﺍﻟﺘﺮﻛﻴﺒﺔ 1 13

Routing Internet Messages: TCP/IP and Packet Switching 1 14

The Client/Server Computing Model 1 16

1 - IP Address ﺍﻟﻌﻨﻮﺍﻥ ﺍﻟﺮﻗﻤﻲ Is the IP address of the Internet: it is a unique number assigned to the definition of the host device and is called (Dot Address) or (Host Address) ﻭﻫﻮ ﺭﻗﻢ ﻓﺮﻳﺪ ﻣﺤﺪﺩ ﻳﺨﺼﺺ ﻟﺘﻌﺮﻳﻒ ﺍﻟﺠﻬﺎﺯ : ﻫﻮ ﻋﻨﻮﺍﻥ ﺑﺮﻭﺗﻜﻮﻝ ﺍﻻﻧﺘﺮﻧﺖ ﺍﻟﻤﻀﻴﻒ It consists of four numbers separated by a point, and each number ranges between 0 and 255 Example : 201. 61. 186. 227 1 18

• Domain Names Server (DNS): allows numeric IP addresses to be expressed in natural language. . ﻳﺴﻤﺢ ﺑﺎﻟﺘﻌﺒﻴﺮ ﻋﻦ ﺍﻟﻌﻨﻮﺍﻧﻴﻦ ﺍﻟﺮﻗﻤﻴﺔ ﺑﺎﻟﻠﻐﺔ ﺍﻟﻄﺒﻴﻌﻴﺔ -Example: cnet. com = 216. 200. 247. 134 1 24

Root Server ------------------------------------------------ac mil Main Domain info org gov net com edu ------------------------------------------------Sub Domain ahram google yahoo ------------------------------------------------Domain Hosts www 1 mail 25

The meaning of abbreviations in the hierarchical structure of the Domain Names Abbreviation Meaning in English Meaning in Arabic mil Military 0 rg Organization gov Government net Networks com Commercial ﻫﻴﺌﺎﺕ ﺗﺠﺎﺭﻳﺔ ﺗﻬﺪﻑ ﻟﻠﺮﺑﺢ edu Educational ( ﻫﻴﺌﺎﺕ ﺗﻌﻠﻴﻤﻴﺔ )ﺍﻟﻘﻄﺎﻉ info Information ﻗﻄﺎﻉ ﺍﻟﻤﻌﻠﻮﻣﺎﺕ ac Academic 1 ﻫﻴﺌﺎﺕ ﻋﺴﻜﺮﻳﺔ ( ﻫﻴﺌﺎﺕ ﻏﻴﺮ ﺭﺑﺤﻴﺔ )ﻣﻨﻈﻤﺎﺕ ﻫﻴﺌﺎﺕ ﺣﻜﻮﻣﻴﺔ ( ﻗﻄﺎﻉ ﺍﻟﺸﺒﻜﺎﺕ )ﺍﻟﺸﺒﻜﻲ ﻣﺆﺴﺴﺎﺕ ﺍﻛﺎﺩﻳﻤﻴﺔ 26

Internet Architecture 1 33

3 -T 1 and T 3: International telephone standards for digital communication : ﺗﺼﺎﻻﺕ ﺍﻟﺮﻗﻤﻴﺔ ﻼ ﻣﻌﺎﻳﻴﺮ ﺍﻟﻬﺎﺗﻒ ﺍﻟﺪﻭﻟﻴﺔ ﻟ • T 1: 1. 54 Mbps • T 3: 43 Mbps 4 -Satellite: high-speed downloads (256 Kbps to 1 Mbps). 1 35

Wireless Internet Access: Telephone and Wi-Fi LAN Technologies Wireless is a type of computer networks which are used the infrared and radio frequency to transfer data and information through the air. Two basic types of wireless Internet access: 1 -Telephone-based 2 - Computer network-based 1 36

Wireless Internet Access Technologies 1 37

Types of ecommerce platforms There are many ways to classify or break down the different types of ecommerce platforms, but let's start with two easy distinctions: 1 -Self-hosted ecommerce platforms : require online store owners to find hosting, deal with installations, and often times perform updates to the software. ﺗﺘﻄﻠﺐ ﻣﻦ ﺃﺼﺤﺎﺏ ﺍﻟﻤﺘﺎﺟﺮ ﻋﺒﺮ : ﻣﻨﺼﺎﺕ ﺍﻟﺘﺠﺎﺭﺓ ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻤﺴﺘﻀﺎﻓﺔ ﺫﺍﺗﻴﺎ 1 ﻭﻏﺎﻟﺒﺎ ﻣﺎ ﻳﻨﻔﺬﻭﻥ ﺗﺤﺪﻳﺜﺎﺕ ، ﺍﻹﻧﺘﺮﻧﺖ ﺍﻟﻌﺜﻮﺭ ﻋﻠﻰ ﺍﻻﺳﺘﻀﺎﻓﺔ ﻭﺍﻟﺘﻌﺎﻣﻞ ﻣﻊ ﺍﻟﻤﻨﺸآﺖ . ﻟﻠﺒﺮﻧﺎﻣﺞ 1 39