€h 17 Data Network Design Flashcards
17-1 network design
Functional design =
Top-down design
17–2 network design
Physical design =
Bottom-up 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 =
(2)
*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 =
(4)
* Transfer
* process
* billing
* quality
17–8 layers
Layer 3 network =
(2)
* Internetwork data transfer
* route
17–8 layers
Layer 2 datalink =
Intra-network between devices
17–8 layers
Layer 1 physical=
Over various media
ISO Layers
ISO layers
17–11 types of networks
PAN =
(3)
Personal area network individual workspace 33 ft
Fig 17.6
Personal area network
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
Fig 17.8
campus area network
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
17–16 EFM
Loops distance =
20,000 feet
Fig 17.11
Ethernet in the first mile (EFM)
17–25 EFM cabling transmission characteristics
DWDM/NZDSF =
Submarine
17–26 types of messaging
Unicast =
broadcast =
multicast =
* One receptionist
* all devices
* select group
17–36 types of addressing
Octet =
Mac addresses =
Network addresses =
* 8 bits
* 48 bits
* 32 bits
Fig 17.22
Network Address =
MAC Address =
Network address = 192.168.0.1
MAC address = 00-01-2F-C3-16-12
17–41 network architecture standards
802.11 =
Wireless
(Hint: two towers = 11)
17–41 network architecture standards
- 5 =
Token ring
(Hint: “FIVE TOKEN RINGS!!!”)
17–41 network architecture standards
802.6 =
MAN
(HINT: 6 the man)
17–41 network architecture standards
802.7 =
Broadband
17–41 network architecture standards
802.8 =
Fiber optic
17–46 stations
NIC=
Station to the network
17–46 stations
Improve performance =
Traffic prioritization
17–47 stations
Hub a NIC =
Half duplex mode
17–51 servers
Rack unit =
RU, 1RU
17–52 servers
42U =
Contains 168 servers
17–54 servers
Link aggregation =
(2)
*Multiple NICs
*Upgrade server resources incrementally
17–54 servers
Hot swap =
* Replacement server and NIC
* powering down
17–55 servers
Clustering =
Two or more servers
17–56 shared peripherals
Print servers =
Spooling
17–60 data network design
Hub =
Centralized point
17–60 data network design
Before the introduction of hubs =
LAN
17–62 hubs
Hub =
Layer one physical
17–64
Q: with an older system which is periodically slowing down and consists of layer 2 switches, what can be done to speed up the system?
Install bridges
17–67
Bridges =
Layer 2 datalink
17–68 switches
Switches =
Network access device
17–68 switches
Port on a hub =
Port on a switch =
* Shared connection
* dedicated connection
17-69 switches
Switch =
Layer 2 data link
17-72 routers
Router =
(2)
* Hardware and software, specialized devices
* Multiple broadcast domains/subnet
Fig 17.50
How many broadcast domains?
VLAN 1 = 5
- Switch A - ports 1,4,6
- Swithc B - ports 5,8
VLAN 2 = 3
- Switch A = port 3
- Swich B = ports 2,7
If no VLAN, the physical LAN would represent 1 single boardcast domain
17–88 voice communications
G.711 =
Converting speech
17–88 voice communications
IEEE 802.1p
Prioritization
17–94 video communications
Videoconferencing =
Most demanding resource
17–95 voice communications
Gateway =
gatekeeper =
Multipoint control unit MCU =
* Communications
* operations
* videoconference sessions
