(OLD) €h 17 Data Network Design Flashcards
17–2 network design
Physical design =
Bottom-up design
17-1 network design
Functional design =
Top-down design
17–3 networking history
1970s =
Ethernet is developed
17–5
OSI =
Open systems interconnection
17–5 OSI
ISO =
2
International organization for standardization
1978
17-5 OSI
objective OSI model =
Structured approach
17–5 OSI
OSI model =
2
Seven layers
Layer above
17–6 OSI
Layers OSI model =
Protocol stack
17–6 OSI
Protocol stack =
3
- Services
- lower layers to upper layers
- SAP’s connection point between layers
17–8 layers
7 layers =
All People Seem To Need Domino's Pizza
17–8 layers
All people seem to need dominos pizza =
A= 7 Application P= 6 presentation S= 5 session T= 4 transport N= 3 network D= 2 datalink P= 1physical
17–8 layers
Layer 7 application =
Applications
file transfer
17–8 layers
Layer 6 presentation =
Encryption
17–8 players
Layer 5 session =
Synchronizing
start, stop, restart
17–8 layers
Layer 4 transport =
Transfer
process
billing
quality
17–8 layers
Layer 3 network =
Internetwork data transfer
route
17–8 layers
Layer 2 datalink =
Intra-network
between devices
17–8 layers
Layer 1 physical=
Over various media
17–11 types of networks
PAN =
3
Personal area network
individual workspace
33 ft
17–12 types of networks
LAN =
2
Local area network
within a building
17–13 types of networks
CAN =
2
Campus area network
two or more buildings
17–14 types of networks
MAN =
2
Metropolitan area network
within a city
17–15 types of networks
WAN =
2
Wide area network
geographic distances
17–16 Ethernet in the first mile
EFM =
IEEE 802.3ah
