information technology data creation data maintenance data transfer
TRANSCRIPT
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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