Transcript Hardware - Networking Device


What is a network and how does it
function with computer systems?
It is a collection of computers and
devices that communicate with one
another over transmission lines or
wirelessly.
Layer 5 Application
VR
Layer 4
Layer 3 Internet
Layer 2
Layer 1
7 LAYER OSI
5 LAYER OSI
REAL
Physical layer is the device that governs
the transmission of data to the data link
layer, the second layer.
Example: A Computer sends data
through a network card which all contain
a physical address called the media
access control address or MAC address.
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Directs data from layer 1 including physical
address(MAC address) to layer 3 via frames.
Example: A Switch in a mid to enterprise class
company are separate devices but at home they
are built into the firewall/router/cable
modems.
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Routers on the internet layer receives the frame
with various data length and creates/fragments
the data into standard packets.
Part of the data sent contains 4byte for an IP
address.
i.e. IP address of 192.168.0.1 which is logical
address or path to the physical MAC address
Layer 4: transport layer-router provides
reliability between users during transport via
various protocols.
 Provides error correction.
 Novell, Windows, MAC, Linux and other
platforms sending data will have data sent
with compatible standard
 Notice no picture? All virtual-data is not
moving in OSI model but affects
performance such as latency, which is a
parameters we will talk about shortly.
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The application layer interfaces directly
to and performs common application
services for the application processes.
 In short how applications communicate
to each other.
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Because it give both the technician and the manager an
overview of the network and network traffic so they can make
informed decision that attain the current and future goals of
the company.
The technicians can provide the data but the CIO and others
managers can use the OSI model to help discuss the
expectations of network, cost of network equipment, location of
bottleneck or problem with the network, and most important
scalability/interoperability (growth/shrink, future/backward
compatibility)
To attain company goals ;network speed, and other
expectations and parameters (which Dan will discuss)of the
network are all variables and factors that determine network
type, cost and performance. All of which is essential for
managerial decision making.
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Type of Local Area Network(LAN),a network within
one location or building, helps identify speed within
your network.
Usually
Download and
upload speed
the same
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100BaseT network at 100Mbps is the most common
for house SOHO network companies and is sufficient
for most network operations.
Speed affects performance and is most commonly
measured in mbps= megabits per second. Not bytes
which is 8 times greater and quite often misused
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Companies, such as movie and audio editing companies,
who require large constant amount of network data transfer
may use fiber optics at 1000 mbps.
Internet and Wide Area Network(WAN),network in separate
geographic locations, determine the speed and
performance of sending/receiving information over the
internet or to another branch office.
WAN speeds are expressed in kilobits per second(kbps)and
are usually much slower than and more expensive than LAN
speeds . WAN download/upload rate are usually the same.
unlike internet Cable /DSL with fast download rates but slow
upload rates. Knowing how much information you can send
and receive is crucial not just for technicians but for
managers seeking to understand the costs associated to
data transfer.
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The # of devices and connections a network can handle
would be the capacity. An important piece of information a
manager needs.
The amount of data that can be transferred through your
network in a given period would be your available
bandwidth.
Latency (delay of data to get to a location) affects RealTime data.
Virtual private network(VPN ) can be used on Confidential
data, for secure connectivity over a VPN tunnel to another
network on the internet or WAN.
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These parameters help the manager objectively quantify
and record the statistics on the network for proper analysis.
Managers can discuss with the network technician the details
of the necessary network type, network capacity, network
speed and data type the network can handle.
The network technician does not necessarily know what the
company deems confidential or what data needs to be realtime. Managers on the other hand often have this
information available.
Usually More Bandwidth, more Capacity, Less latency, more
security =more $$$, more devices, more labor and
administration
With all parameters examined and proper collaboration the
manager can make an informed decisions to benefit the
company’s network current and future needs.
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SOHO Net Diagram
Network Snapshot
Branch #2
Firewall
Trusted LAN
Router
Backup DC
Router
Workstation
Internet
Main Office
Firewall
ISP
VPN
Private
WAN
T1 Line
Router
Trusted
LAN
MS Domain
Controller
Workstation
Main Office
QTY
1
1
1
1
1
4
4
2
1
1
Description
Cisco 1721 Router, 2 WAN Slots, 1 10/100 ETH, IP IOS
Cisco 10FT CABLE DTE V.35M
Cisco 1721, 1PT WAN SER MOD
Cisco 1721 Maintenance Contract - 3 Years
Adtran TSU100e T-1 DSU/CSU w/ 1 Exp. Slot & SNMP
XPSTM M1330
XPS Desktops
HP Printers
HP ProCurve 2512M 10/100 12-port Switch
Dell Blade Server
Main Office
Unit Price
$956.40
$85.87
$321.70
$264.93
$1,397.08
$1,499.00
$999.00
$950.00
$867.30
$1,249.00
Ext. Price
$956.40
$85.87
$321.70
$264.93
$1,397.08
$5,996.00
$3,996.00
$1,900.00
$867.30
$1,249.00
$17,034.28
Unit Price
Ext. Price
$4,900.00
$499.00
$5,399.00
Other Charges
Description
Total Configuration and/or Installation Charges
Monthly T1 Charges
Other Charges
New Branch
WAN Components
QTY
1
1
1
1
1
Description
Cisco 1721 Router, 2 WAN Slots, 1 10/100 ETH, IP IOS
Cisco 10FT CABLE DTE V.35M
Cisco 1721, 1PT WAN SER MOD
Cisco 1721 SMARTnet Maintenance Contract - 3 Years
Adtran TSU100e T-1 DSU/CSU w/ 1 Exp. Slot & SNMP
WAN Components
Unit Price
$956.40
$85.87
$321.70
$264.93
$1,397.08
Ext. Price
$956.40
$85.87
$321.70
$264.93
$1,397.08
$3,025.98
LAN Components
QTY
1
4
4
2
Description
HP ProCurve 2512M 10/100 12-port Switch
XPSTM M1330
XPS Desktops
HP Printers
LAN Components
New Branch
Unit Price
$867.30
$1,499.00
$999.00
$900.00
Ext. Price
$867.30
$5,996.00
$3,996.00
$1,800.00
$12,659.30
$15,685.28