241-206: Chapter 2 Networking Fundamentals touch@coe.psu.ac.th Wednesday, June 10, 2009
Chapter Outline
Chapter Outline Network Terminology Wednesday, June 10, 2009
Chapter Outline Network Terminology Bandwidth Wednesday, June 10, 2009
Chapter Outline Network Terminology Bandwidth Networking Models Wednesday, June 10, 2009
Network Terminology
Physical Network Topology Wednesday, June 10, 2009
Computer Communication Protocol data representation signaling authentication error detection Wednesday, June 10, 2009
Standard Organization IETF, IEEE, ISO for internet communication ITU-T for telecommunications and PSTN ITU-R for radio communications NMEA for marine electronics etc. Wednesday, June 10, 2009
Proprietary Standards AppleTalk DECnet IPX/SPX Server Message Block (SMB) and CIFS Systems Network Architecture (SNA) Apple Filing Protocol (AFP) Wednesday, June 10, 2009
Local Area Network (LAN) Operate within a limited geographical area Usually required high data rate transmission Control the network privately under local administration Provide full-time connectivity to local services Connect physically adjacent devices Wednesday, June 10, 2009
LAN Devices
LAN Devices Repeater Wednesday, June 10, 2009
LAN Devices Repeater HUB Wednesday, June 10, 2009
LAN Devices Repeater HUB Bridge Wednesday, June 10, 2009
LAN Devices Repeater HUB Bridge Ethernet Switch Wednesday, June 10, 2009
LAN Devices Repeater HUB Bridge Ethernet Switch Router Wednesday, June 10, 2009
Wide Area Network (WAN) Operate over a large geographical area Allow access over serial interfaces operating at lower speeds Provide full-time and part-time connectivity Connect devices separated over wide, even global areas Wednesday, June 10, 2009
WAN Devices
WAN Devices Router Wednesday, June 10, 2009
WAN Devices Router Modem, DSU/CSU, TA/NT Wednesday, June 10, 2009
WAN Devices Router Modem, DSU/CSU, TA/NT Communication Switch Wednesday, June 10, 2009
Metropolitan Area Network (MAN)
Storage Area Network (SAN) Wednesday, June 10, 2009
Virtual Private Network (VPN)
VPN Technologies
Intranet and Extranet
Bandwidth
Why bandwidth is so important? Bandwidth is limited by physics and technology Bandwidth is not free Bandwidth requirement are growing at a rapid rate Bandwidth is critical to network performance Wednesday, June 10, 2009
Pipe Analogy for Bandwidth Wednesday, June 10, 2009
Highway Analogy for Bandwidth
Units of Bandwidth
Units of Bandwidth Unit of Bandwidth Abbreviation Equivalence Wednesday, June 10, 2009
Units of Bandwidth Unit of Bandwidth Abbreviation Equivalence Bits per second bps 1 bps = fundamental unit of bandwidth Wednesday, June 10, 2009
Units of Bandwidth Unit of Bandwidth Abbreviation Equivalence Bits per second bps 1 bps = fundamental unit of bandwidth Kilobits per second kbps 1 kbps = ~1,000 bps Wednesday, June 10, 2009
Units of Bandwidth Unit of Bandwidth Abbreviation Equivalence Bits per second bps 1 bps = fundamental unit of bandwidth Kilobits per second kbps 1 kbps = ~1,000 bps Megabits per second Mbps 1 Mbps = ~1,000 kbps Wednesday, June 10, 2009
Units of Bandwidth Unit of Bandwidth Abbreviation Equivalence Bits per second bps 1 bps = fundamental unit of bandwidth Kilobits per second kbps 1 kbps = ~1,000 bps Megabits per second Mbps 1 Mbps = ~1,000 kbps Gigabits per second Gbps 1Gbps = ~1,000 Mbps Wednesday, June 10, 2009
Units of Bandwidth Unit of Bandwidth Abbreviation Equivalence Bits per second bps 1 bps = fundamental unit of bandwidth Kilobits per second kbps 1 kbps = ~1,000 bps Megabits per second Mbps 1 Mbps = ~1,000 kbps Gigabits per second Gbps 1Gbps = ~1,000 Mbps Terabits per second Tbps 1 Tbps = ~1,000 Gbps Wednesday, June 10, 2009
Maximum Bandwidths and Length Limitations Wednesday, June 10, 2009
WAN Services and Bandwidth
Throughput Actual measured bandwidth throughput <= Digital Bandwidth of a medium Wednesday, June 10, 2009
Variables that May Affect Throughput PC (client) The server Other users on the LAN Routing within the Cloud The design (topology) of all networks involved Type of data being transferred Times of day Wednesday, June 10, 2009
Transfer Time Calculation
Audio Analogy of Bandwidth Wednesday, June 10, 2009
Networking Models
Analyzing Network in Layers
Network Comparisons
Network Communications
Layer Communications
OSI Model
Benefits of the OSI Model Reduces complexity Standardizes interfaces Facilitates modular engineering Ensures interoperate technology Accelerates evolution Simplifies teaching and learning Wednesday, June 10, 2009
Physical Layer
Datalink Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application Layer
Peer-to-Peer Communications
Peer-to-Peer Communications
TCP/IP Model
Common TCP/IP Protocols
Comparing TCP/IP with OSI Model
Data Encapsulation 010101010101010101 Wednesday, June 10, 2009
Data Encapsulation Example Wednesday, June 10, 2009