Transcript Network Device

Network Devices
Sritrusta Sukaridhoto
Network Devices
Media
Media
Multiplexer
PC
PC
Media on PC
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Ethernet
Modem
PC Card (WLAN)
DVB
Ethernet - Architecture
Ethernet – IEEE 802.3
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10Base5 – Thick wire coaxial
10Base2 – thin wire coaxial / cheaper
net
10BaseT – Twisted Pair
10BaseF – Fiber Optics
100BaseT – Fast Ethernet
Ethernet – 10Base5
Ethernet – 10Base2
Ethernet – 10BaseT
NIC Connector type
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Coaxial Cable
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Twisted Pair Cable
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Bayonet Nut Connector (BNC)
RJ-45 (8 wire)
Fiber Optics
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SMA connectors
Modem
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Allows modems of different vendors to
operate together
Define How modems operate:
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Modulation techniques
Data compression technique
Error detection strategy
Modem – Analog vs Digital
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Analog
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Infinite number of levels
Conform to voice pattern
Times from highest to lowest and back to the
highest point in one second is the frequency
Can be transmitted over long distance
Digital
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Only two levels (high and low)
Conforms to how computers operate
Cannot transmitted over long distance
Modem - Connection
Modem – Internal/External
PC Card – WLAN (802.11)
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Bypassing last mile
PC Card (WLAN) - 1
PC Card (WLAN) - 2
PC Card (WLAN) – Indoor
Antena
DVB – DVB/IP Tech
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The Digital Video Broadcast over Internet
Protocol (DVB/IP) system is functionally an
IP-over-Ethernet simplex satellite service
that incorporates frame-relay type traffic
management. At its core, DVB is a modemon-a-chip, plus an intelligent multiplexer.
The antenna is typically a CATV dish, 2.4 3.8 meters in diameter (for C-band), or 0.6 1.8 meters (for Ku-band).
DVB – DVB/IP Routing
DVB - Adaptability
DVB – DVB Card
Media
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Wired
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Twisted Pair – UTP
Coaxial
Fiber
Wireless
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Microwave
Satellite
Twisted Pair
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Two wired wrapped in
a twisted fashion
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Designed to reduce
cross-talk due
inductance
Still subject to
interference from stray
signal
Primarily used for local
loop connections and
LANs
Comparatively narrow
bandwidth
UTP – Unshielded Twisted
Pair
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Pair 1
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Pair 2
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White/Green
Green
Pair 4
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White/Orange
Orange
Pair 3
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White/blue
Blue
White/Brown
Brown
RJ45 Connector
UTP – Straight Cable
Wo/O Wg/B Wb/G Wbr/Br
UTP – Cross Cable
Wg/G Wo/B Wb/O Wbr/Br
UTP - Category
Category
CAT 1
Maximum Data Rate
Less than 1 Mbps
Usual Application
Analog voice (POTS),
Integrated Services Digital Network Basic Rate Interface in ISDN
Doorbell wiring
CAT 2
4 Mbps
Mainly used in the IBM Cabling System for token ring networks
CAT 3
16 Mbps
Voice and data on 10BASE-T Ethernet
CAT 4
20 Mbps
Used in 16 Mbps Token Ring
Otherwise not used much
CAT 5
100 Mbps
100 Mbps TPDDI (100BASE-T or Fast Ethernet)
1000 Mbps (4 pair)
155 Mbps ATM
Gigabit Ethernet
CAT 5E
100 Mbps
100 Mbps TPDDI (100BASE-T or Fast Ethernet)
155 Mbps ATM
CAT 6
200-250 MHz
Super-fast Broadband Applications.
Coaxial
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Center lead conducts the signal
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Protected by insulation and braded wire
Used mostly for television and connections to
antenna
Larger Bandwidth but large in size
Fiber Optical
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Signal transmitted by photos rather than electrons
Dramatically higher bandwidth
Used mostly for backbone communication
connections, very high speed LANs and fast
network connections
Microwave – Antenna (1)
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Omni
2.4GHz 8dBi
Microwave – Antenna (2)
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Sectoral
14dBi 180deg
Microwave – Antenna (3)
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Sectoral
17dBi 90deg
Microwave – Antenna (4)
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Direct (Grid)
2.4 GHz 24dB
Microwave – Power AMP
Satellite - Broadband
Media Comparison
Multiplexer
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HUB
Switch
Bridge
Router
Hub versus Switch
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Hub provide connection to all ports (i.e. in
one port and out all other ports).
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Passive hub – no signal regeneration
Active hub – provide signal regeneration
Switch direct the message from appropriate
port (directs a message from the input port
to the desired output port).
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More expensive but better bandwidth utilization
Hub versus Switch
LAN Hub device
Hub
LAN Switch device
Switch
Bridge – Access Point (WLAN)
Router
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Connecting different segment
Have different interfaces (Ethernet,
WAN-Serial, Fiber, etc)
Table Routing
Router