Welcome to 273361 การจัดการเครือข่ายสำหรับ...

Welcome to

273361

การจั�ดการเครอข่�ายสำ�าหร�บระบบสำารสำนเทศ

(Network Management for Information Systems)

235032 Computer Network

Chapter 1Introduction to Networking

Welcome to

273361

การจั�ดการเครอข่�ายสำ�าหร�บระบบสำารสำนเทศ

(Network Management for Information Systems)

235032 Computer Network

Chapter 1Introduction to Networking

School of ICT, University of Phayao

Mr.Sukchatri PRASOMSUK, Ph.D.

ดร.สำ�ข่ชาตร� ประสำมสำ�ข่ (Sukchatri PRASOMSUK, Ph.D.)• PhD. (Computational Linguistics), INALCO, Paris, FR• M.Eng.(IT), & Grad.Dip. In Applied IS, RMIT, Melbourne, AU• B.Sc.(คณิ�ตศาสตร์), ม.ร์ามค�าแหง• เคยทำ�างานทำ�� :

» DATA SOLVE Co.,Ltd. & Central Trading Co.,Ltd» กร์มวิ�ทำยาศาสตร์บร์�การ์ กร์ะทำร์วิงวิ�ทำยฯ» ม.หอการ์ค�า และ ม.แม�ฟ้ าหลวิง

Contact : » [email protected] » 0804509105

• Notes/Slides Download:» http://www.ict.up.ac.th/skchatri/

Network Management for Information systems

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About me & Introduce yourself


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Course OverviewStudy time :

• Class: Mon. ICT 1419 : 15.00-17.00 • LAB : Mon. ICT 1402 : 17.00-19.00

Grading :

• Atten.& Assignments (Lec.& LAB) 10 %• Lab Test 1 30 % • Mid-Term Exam 30%• Final-Term Exam 30%


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Course OverviewText:

• 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

– 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– 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• 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, packet-switching 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, – 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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• Network structure– Interface message processor (IMP)– Point-to-point communication– Multicast communication– Broadcast communication


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– 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: – 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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• 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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• 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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• 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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• 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)

• 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 :

• IP Address• 10.5.15.100• 198.168.10,15• 191.45.30.10• 127.0.0.0

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