Chapter 6 Data Communications. Network Collection of computers Communicate with one another over transmission line Major types of network topologies What.

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Presentation transcript:

Chapter 6 Data Communications

Network Collection of computers Communicate with one another over transmission line Major types of network topologies What Is a Computer Network? 6-2 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Categories of computer networks 6-3 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

1-4 What Are the Components of a LAN? Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 6-4

Network interface card (NIC) Transmission media – wired or wireless Network components 6-5 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

1-6 Network Components Transmission Media UTP cable: Most popular for wired Ethernet networks Types of UTP cable ―Cat 5E: Cheapest, designed for 100 Mbps ―Cat 6: Designed to support gigabit Ethernet network ―Cat 6a: Designed for ultra-fast Ethernet networks 6

UTP & RJ Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Wireless Router 6-8 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Home Network 6-9 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Network Components 10 Routers and switches facilitate and control the flow of data ―Router: Transfers packets of data between two or more networks ―Switch: Receives data packets and sends them to intended nodes on the same network

LAN Protocol 6-11 IEEE Protocol Wired LAN 10/100/1000 Mbps EthernetEthernet Protocol specifies hardware characteristics, cables, and how messages are packaged and processed Wireless LAN Most popular g (2010) Bluetooth Common wireless protocol for transmitting data over short distances—wireless mice and keyboards, cell phones Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall IEEE Protocol

Connecting to the Internet Wireless Internet Access Mobile broadband: Connect to Internet through cellular network to get 3G or 4G access. Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall 12

TCP/IP Architecture 6-13 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Hyper Text Transport Protocol (HTTP) Protocol used between browsers and web servers. Simple Mail Transfer Protocol (SMTP) Used for transmissions. File Transfer Protocol (FTP) Used to move files over Internet. Web-Internet-based network of browsers and servers that process http or https. When you use ftp or smtp, you are using Internet, not web. Application Layer Protocols 6-14 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

TCP or Transmission Control Protocol Breaks traffic up into pieces and send each piece along its way IP (Internet Protocol) Specifies routing of pieces of data communication through networks that comprise any Internet Packet is a piece of a message that is handled by programs that implement IP Router is a special purpose computer that moves packet traffic according to rules of IP protocol TCP and IP Protocols 6-15 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Public IP Addresses Identify a particular device on public Internet Public IP Addresses must be unique, worldwide Assignment controlled by ICANN (Internet Corporation for Assigned Names and Numbers)ICANN Private IP Addresses Identify a particular device on a private network, usually on a LAN IP Addressing 6-16 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

IPv4IPv4 Supports (2 32 ) or 4,294,967,296 addresses Four decimal dotted notation like IPv6IPv6 - Supports addresses Public IP Addresses and Domain Names 6-17 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall Domain name Unique name affiliated with public IP address URL (Uniform Resource Locator)

Virtual private network Uses Internet or private network to create appearance of point-to-point connections Uses public Internet to create appearance of private network How Do Organizations Benefit From Virtual Private Networks (VPNs) 6-18 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

IIUM VPN 6-19 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall