Welcome to
273361
การจัดการเครื อข่ ายสาหรับระบบสารสนเทศ
(Network Management for
Information Systems)
235032 Computer Network
Chapter 1
Introduction to Networking
School of ICT,
University of Phayao
Mr.Sukchatri PRASOMSUK, Ph.D.
About me & Introduce yourself
ดร.สุขชาตรี ประสมสุข
(Sukchatri PRASOMSUK, Ph.D.)
•
•
•
PhD. (Computational Linguistics), INALCO, Paris, FR
M.Eng.(IT), & Grad.Dip. In Applied IS, RMIT, Melbourne, AU
B.Sc.(คณิตศาสตร์), ม.รามคาแหง
•
เคยทางานที่ :
» DATA SOLVE Co.,Ltd. & Central Trading Co.,Ltd
» กรมวิทยาศาสตร์บริการ กระทรวงวิทย์ฯ
» ม.หอการค ้า และ ม.แม่ฟ้าหลวง
 Contact :
» skchatri@hotmail.com
» 0804509105
•
Notes/Slides Download:
» http://www.ict.up.ac.th/skchatri/
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Course Overview
Study time :
• Class: Mon. ICT 1419 :
• LAB : Mon. ICT 1402 :
15.00-17.00
17.00-19.00
Grading :
• Atten.& Assignments (Lec.& LAB)
• Lab Test 1
• Mid-Term Exam
10 %
30 %
30%
• Final-Term Exam
30%
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Course Overview
Text:
• Data Communications and networking, 2nd
Edition, Forouzan, McGrawHill, 2002
• Cisco CCNA
• Network A+
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Scope of Course
• Data Communications
• LAN (local area networks)
• Communications architecture and protocols and
wide-area networks (WAN).
• Concepts, terminology, principles and design
approaches used in data communication systems.
• Layered protocol architecture.
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Scope of Course
What are data communication systems?
• A set of devices (hosts) connected by a
communication medium that are able to
share data through transmission over the
media
• System Characteristics include (but are not
limited to)
– Physical properties of the communication
signals
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Data Communication Systems
– Physical topology of the communication medium
and logical topology of the data transmission
– Format and timing of the signals
– Error and Flow control, connection management,
recovery, security
– be able to quickly find protocol descriptions and
problem solutions/discussions
– be able to discuss data communication systems
with supervisors and coworkers on the job
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Introduction
– Why do we use data communication
systems?
• To facilitate the sharing of resources
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Printers
Disk/Tape drives
Computational Power
Data Sets
• To permit the distribution of workload
– Concurrent/parallel computing
– Client-server computing
– Fault tolerance
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Networks and standardization
• Network goals
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information sharing
resource sharing
global environment
Interconnectivity
cost of network equipment, training
Microsoft, Novell, Unix
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Network Evolution
• Network evolution
– Local Area network (LAN), Metropolitan
Area Network (MAN), Wide Area
Network (WAN)
• Local Area network (LAN)
– single building
– internal data rates are higher
– data rates of 10Mbps - 1 Gbps (1Mbps= 106bps)
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Network Evolution
• Copper Distributed Data Interface (CDDI)
• Fiber Distributed Data Interface (FDDI)
• Low speed LANs--Ethernet, token ring,
token bus and some Non-OSI LANs
• High speed LANs--Switched Ethernet,
FDDI, 100 Mbps voice grade, Gigabit
Ethernet
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Network Evolution
• Metropolitan Area Network (MAN)
– metropolitan area, optical; fiber, financial
transaction
• Wide Area Network (WAN)
• Wide area networks
– long distance > 800 miles, Govt. agencies own it
– Data rates of 1Mbps-100Gbps
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•
Circuit switching
Packet switching
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Network Evolution
• Integrated Services Digital Networks(ISDN)->Public telecommunication networks, digital switches
and paths, broad range of traffic
• Narrowband ISDN --> 64-kbps channel, circuit
switching operations
• Broadband ISDNs--> 100s of Mbps, packetswitching operation
• Frame relay-->high data rates (2 Mbps) and low
error rate
• Asynchronous Transfer Mode(ATM)-->Cell relay,
fixed length, 10s and 100s of Mbps
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Network Evolution
• Public analog telephone networks
– Private line network
• offers a fixed bandwidth
• slow speed modem
• digital line--56 Kbps-1.544 Mbps
– Circuit-switched network
• slower data rate
– Packet-switched network
• X.25--widely used standard protocol
• slower and limited to 56 Kbps
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Network Evolution
• Public switched data networks
– low-speed asynchronous terminal
interfaces, X.25 synchronous terminal
interface
• Value-added networks
– communication processors-- nodes,
minicomputer--engine
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Components of computer networks
• Hardware--telephone lines,
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coaxial cables (1860, 10,800, 13200 voice channels,
MOdulation/DEModulation, Coder/decoder,
acoustic coupler,
line interface, terminals, input/output devices,
internetworking devices
• Software--user application,
– network operating system,
– network control module,
– line control module, I/O driver, other library functions
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Components of computer networks
• Network structure
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Interface message processor (IMP)
Point-to-point communication
Multicast communication
Broadcast communication
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Components of computer networks
– How do data communication systems work?
• Systems communicate over a shared
communication medium according to an agreed
upon convention (standard).
• Several sets of standards currently exist:
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TCP/IP
OSI model
Commercial: SNA, IPX, X.25, ...
Proprietary
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LAN evolution
• Ethernet-based LANs: 10 Base-2, 10 Base-5, 10
Base1-T, 10 Base-FL, 100 Base-T, 100 Base-FX
• Gigabit Ethernet-- high speed packet switching
• 100/1000 switches
• ATM-- LAN-to WAN migration
• LANs--higher data rates for integrated traffic
• Virtual LAN-- LAN switching, uses a look up table
for routing the frames
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Basic Networking Knowledge
• Bus Topology
• Star Topology
• Ring Topology
• Mesh Topology (for WAN)
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Basic Networking Knowledge
• Bus Topology : IEEE 802.3 , use a process called Carrier
Sense Multiple Access/Collision Detection (CSMA/CD) prevents
the occurrence of another collision.
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Basic Networking Knowledge
• Star topology : can have a maximum of 1,024 nodes
on a LAN and is commonly used for 10BASE-T (IEEE 802.3)
and 100BASE-TX (IEEE 802.12) Ethernet
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Basic Networking Knowledge
• Ring topology : IEEE 802.5, There is no beginning
or end of the cable. This particular topology forms a
complete ring. The devices on this network use a
transceiver to communicate with their neighbors.
Transceivers also act like repeaters to regenerate each
signal as it is passed through the device.
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Basic Networking Knowledge
• Mesh topology : used for WANs, a mesh topology
connects every device on the network together and provides
a path to and from each device
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Segments and backbones
• Segments : - a trunk (main line) of cabling (concentration
device (hubs or switches)
- a logical grouping of devices (subnet) by
bridges, switches, or routers.
- collision and/or broadcast domain
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Segments and backbones
• Backbones : -main cable (or trunk)
-are the foundations of both LANs and
WANs where servers, routers, and
concentrating devices (such as switches and
hubs) are connected by a high bandwidth
connection.
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Network Operating Systems (NOS)
• Microsoft Windows NT, 2000 : New Technology File
System (NTFS) or File Allocation Table (FAT).
• Novell Netware :uses the NetWare Directory Services
(NDS). NetWare's primary file system is a combination of
FAT (File Allocation Table) and DET (Directory Entry
Table). Layer 3 protocols, which are used in this OS are the
Internetwork Package Exchange (IPX) protocol and the
Internet Protocol (IP).
• Unix : key features include multitasking, multi-users, and
networking capabilities. Multiple versions of UNIX exist,
including Sun Microsystems' Solaris, IBM's AIX, Silicon
Graphics' IRIX, Linux, or Hewlett-Packard's HP-UX
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Protocol
• IP (Internet protocol)
• IPX (Internetwork Packet Exchange)
• NetBEUI (NetBIOS Extended User
Interface)
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RAID Overview
(Redundant Array of Inexpensive Disks)
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Mirroring : RAID 1 : 2 Disk 1 controller
Duplexing : RAID 1 : 2 Disk 2 controller
Stripping : RAID 2,5 : 3 Disks 1 controller with (no)parity.
Volumes : logical structure on the same physical disk
Tape Backup : to store data, Quarter Inch Tape (QIC),
Digital Audio Tape (DAT), and Digital Linear Tapes (DLT).
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The OSI model
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Cabling
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Cabling
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Cabling
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Cabling
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Ethernet
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LAN Symbol
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WAN & Devices
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IP Addressing Format
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IP Address Component Fields
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IP Address Classes
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IP Address Bit Patterns
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IP Address Classes
0--------126
128------------------------191
192----------------------------------------254
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Questions :
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IP Address
10.5.15.100
198.168.10,15
191.45.30.10
127.0.0.0
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