Information technology

Data creationData maintenance

Data transfer

Computer NetworkNetwork advantages

Network typsTopologyManagement methodScale

Scale

LANMANWAN

LAN concept

LAN specification High Performance High security High speed Low cost Easy expansion Limited

MAN Concept

WAN Specification Performance Security Speed Cost Expansion limited

WAN Concept

WAN Specification Performance Security Speed Cost Easy Expansion limited

Bandwidth concept

The data transfer capacity of a digital communications system as measured in bits per second (bps).

Topology

Wired topology

Wireless topology

Wired topology BUSSTARRINGMESH

Wire less topology ad-hoc Infrastructure

BUS

BUS

• Collision • Terminator• Signal bounce

STAR

straight & cross cable

HUB

• Passive• Active• Smart (switch)

RING

MAU

MESH

Ad-hoc

Infrastructure(access point)

OSIopen system interaction

TCP/IP

Application

• Outlook• Yahoo! Messenger • Google talk• Browser • ...

Transport

• Operation systems• Error detection• Flow control power flow Idle

OUTCOM : segment

Internet

INCOME : segment

OUTCOM : packet

IP

0-255 0-255 0-255 0-255 . . .

IP

• Net ID : common in the Network• Host ID : exclusive for computers• Subnet : All of them have same Net ID

IP

• Class A 0 – 127 255.0.0.0• Class B 128 – 191 255.255.0.0• Class C 192 – 223 255.255.255.0• Class D 224 – 239 • Class E

IP

• Static• Dynamic ( DHCP)• APIPA

Subnet & Router

Network Interface LAN

• Token Ring (Ring 802.5)• Ethernet (Star & Bus 802.3 )• Wireless • .• .• .

OUTCOM : FRAM

Ethernet

• Access method • Ethernet algorithm is CSMA/CD• CS carrier sense • MA multiple access• CD collision detect Result : CSMA/CD is Demand priority star & bus have Demand priority by HUB

IEEE 802

IEEE 802.3 EthernetIEEE 802.5 Token RingIEEE 802.11 wirelessIEEE 802.16 WiMAX

Network Interface WAN• ATM• DSL• Frame Relay• ISDN• Dial-up• Loadsed lined• soNet• CATV• .• .• .

Network Device

CableTP Stp Utp Ftp

UTP : CAT1,CAT2,CAT3,CAT4,CAT5,CAT6,CAT7

Cable- coaxial

Reference for more detail

CompTIA Network+ MC Graw Hill Fourth edition 2010 CompTIA Network+ Sybex 2009 introduction to information system o’Brein , 14th Edition , 2010

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