Information technology Data creation Data maintenance Data transfer

Computer Network Network advantages

Network typs  Topology  Management method  Scale

Scale LAN MAN WAN

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  BUS  STAR  RING  MESH

Wire less topology  ad-hoc  Infrastructure

BUS

Collision Terminator Signal bounce

STAR

straight & cross cable

HUB Passive Active Smart (switch)

RING

MAU

MESH

Ad-hoc

Infrastructure (access point)

OSI open 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

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

IP Class A 0 – Class B 128 – Class C 192 – Class D 224 – 239 Class E

IP Static Dynamic ( DHCP) APIPA

Subnet & Router

Network Interface LAN Token Ring (Ring 802.5) Ethernet (Star & Bus ) 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 Ethernet IEEE Token Ring IEEE wireless IEEE WiMAX

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

Network Device Cable TP 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, 14 th Edition, 2010

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