Transcript Network - Storr Consulting

Network
Dieter W. Storr
January 2002
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How can I connect two PC’s ?
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Network - Contents
Basics
KVM Switch
Network
Wireless Network
OSI Reference Model
Intranet / Internet
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Network - Basics
SNA - Systems Network Architecture
 Proprietary IBM architecture and set of implementing
products for their network computing within an
enterprise.
 It became part of IBM’s System Application Architecture
(SAA) and it is currently part of IBM’s Open Blueprint.
 IBM is finding ways to combine its own SNA within the
enterprise with TCP/IP in a larger network
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Network - Basics
LAN - Local Area Networks
 It’s a group of computers and associated devices that
share a common communications line and typically
share the resources of a single processor or server
within a small geographic area (for example, within an
office building).
 A local area network may serve as few as two or three
users (for example, in a home network) or many as
thousands of users (for example, in an FDDI network).
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Network - Basics
LAN - Local Area Networks
The main local area network architectures are:
Ethernet
Token Ring
ARCnet (Attached Resource Computer Network)
FDDI (Fiber Distributed Data Interface)
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Network - Basics
Ethernet
IEEE 802.3: Ethernet is the most widelyinstalled local area network (LAN) protocol.
Specified in a standard, IEEE 802.3, Ethernet
was originally developed by Xerox and then
developed further by Xerox, DEC, and Intel. An
Ethernet LAN typically uses coaxial cable or
special grades of twisted pair wires.
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Network - Basics
Ethernet
10BASE-T: The most commonly installed
Ethernet systems are called 10BASE-T and
provide transmission speeds up to 10 Mbit/s.
Devices are connected to the cable and
compete for access using a Carrier Sense
Multiple Access with Collision Detection
(CSMA/CD) protocol.
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Network - Basics
Ethernet
100BASE-T or Fast Ethernet provides
transmission speeds up to 100 megabits per
second and is typically used for LAN backbone
systems, supporting workstations with 10BASET cards.
Gigabit Ethernet provides an even higher level
of backbone support at 1000 megabits per
second (1 gigabit or 1 billion bits per second).
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Network - Basics
token ring
A token ring network is a local area network
(LAN) in which all computers are connected in a
ring or star topology and a binary digit- or tokenpassing scheme is used in order to prevent the
collision of data between two computers that
want to send messages at the same time.
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Network - Basics
token ring
Second most widely-used protocol on LAN’s
after Ethernet. The IBM Token Ring protocol led
to a standard version, specified as IEEE 802.5.
Data transfer rates of either 4 or 16 megabits
per second.
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Network - Basics
ARCnet (Attached Resource Computer network)
 ARCnet is a widely-installed local area network (LAN)
technology that uses a token-bus scheme for managing
line sharing among the workstations and other devices
connected on the LAN.
 The LAN server continuously circulates empty message
frames on a bus (a line in which every message goes
through every device on the line and a device uses only
those with its address).
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Network - Basics
FDDI
 FDDI (Fiber Distributed Data Interface) is a standard for
data transmission on fiber optic lines in a local area
network (LAN) that can extend in range up to 200 km
(124 miles).
 The FDDI protocol is based on the token ring protocol.
In addition to being large geographically, an FDDI local
area network can support thousands of users.
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Network - Basics
FDDI
 An FDDI network contains two token rings, one for
possible backup in case the primary ring fails.
 The primary ring offers up to 100 Mbps capacity. If the
secondary ring is not needed for backup, it can also
carry data, extending capacity to 200 Mbps.
 The single ring can extend the maximum distance; a
dual ring can extend 100 km (62 miles).
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Network - Basics
Hub / Switch / Bridge / Router
 In data communications, a hub is a place of
convergence where data arrives from one or more
directions and is forwarded out in one or more other
directions. A hub usually includes a switch of some kind.
See USB 7-Port Hub
To connect several
USB devices
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Network - Basics
Hub / Switch / Bridge / Router
 In telecommunications, a switch is a network device
that selects a path or circuit for sending a unit of data to
its next destination.
See 8-Port Network Switch
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Network - Basics
Hub / Switch / Bridge / Router
 A switch may also include the function of the router, a
device or program that can determine the route and
specifically what adjacent network point the data should
be sent to.
 In general, a switch is a simpler and faster mechanism
than a router, which requires knowledge about the
network and how to determine the route
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Network - Basics
Hub / Switch / Bridge / Router
 In telecommunication networks, a bridge is a product
that connects a local area network (LAN) to another
local area network that uses the same protocol (for
example, Ethernet or token ring).
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Network - Basics
Hub / Switch / Bridge / Router
 On the Internet, a router is a device or, in some cases,
software in a computer, that determines the next
network point to which a concept of packet should be
forwarded toward its destination.
See 4-Port Cable/DSL Router
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Network - Basics
Hub / Switch / Bridge / Router
 The router is connected to at least two networks and
decides which way to send each information packet
based on its current understanding of the state of the
networks it is connected to.
 A router is located at any gateway (where one network
meets another), including each Internet point-ofpresence. A router is often included as part of a network
switch.
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Network - Basics
LAN Server
 Typically, a suite of application programs can be kept on
the LAN server. Users who need an application
frequently can download it once and then run it from
their local hard disk. Users can order printing and other
services as needed through applications run on the LAN
server. Read and write access is maintained by a LAN
administrator.
 A LAN server may also be used as a Web server if
safeguards are taken to secure internal applications and
data from outside access.
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Network - Basics
Wireless LAN
Mobility
Cost Savings
Disaster Recovery
Concerns
Radio signal interference, power management, system
interoperability, network security, connection problems,
installation issues, health risks
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Network - Basics
NOS - Network Operating System
Artisoft's LANtastic, Banyan VINES, Novell's
NetWare, and Microsoft's LAN ManagerNetware,
MS NT Server
One thing comes through loud and clear in the year
2000 State of the VAR Market survey data about
network operating systems (NOS). The NOS race seems
to be over. Windows has won, and Netware is slowly just
going away.
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Network - KVM Switch
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Network - KVM Switch
KVM Switch PS/2 Platform
Control 2 and more
computers from one console.
Price starts at $74.99
Cable Kit starts at $19.99
per Computer
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Network
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Networking Starting Kit
One 4-Port Cable/DSL Gateway Router
Two Desktop Network
PCI Cards
Two 14' Snagless
Molded RJ45 CAT-5e
Patch Cables
Price saw at Belkin:
$83.99
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Network Switch
8-Port Network Switch (10/100Mbps)
Package
 One 8-Port Network Switch
(10/100Mbps)
 One Power Supply
 One CD-Rom (Belkin SOHO
Networking Software)
 Compatible with Windows® 98,
Windows® 2000, Windows® Me, Windows® XP.
 Price: $87.99
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Network Switch
8-Port Network Switch (10/100Mbps)
Features
 Share your Internet connection
 Exchange data quickly between connected PCs and notebooks,
share printers and other peripherals, and communicate via e-mail
 Auto-sensing feature offers future scalability of 10Base-T Networks
into 100Base-T Networks
 Add computers to your network at anytime with the uplink port(s).
 Use the dedicated bandwidth provided for each port to enjoy an
efficient and error-free network
 Compliant with Ethernet IEEE 802.3 and 802.3u standards
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Network
Ethernet Card
($24.99 per PC) already installed in most PC’s
Router - 8 port Network Switch
($87.99, e.g. Belkin)
RJ45 CAT-5e Patch Cable
(starts at $6.99 per PC)
Software
Windows NT or free Belkin SOHO Networking Software
included w/ router
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Wireless Local Area Network
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Wireless Local Area Network
Wireless Desktop PCI Network Card ($164.99)
Wireless Desktop PCI Network Adapter ($49.99)
Wireless Network Access Point ($199.99)
Wireless Notebook Network Card ($109.99)
Wireless Cable/DSL Gateway Router ($249.99)
Wireless USB Network Adapter ($109.99)
Networking Software ($?.??)
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Network - Internet Access
KVM Switch
Internet
DSL Gateway Router
NAT Firewall
LAN Server
All Servers have access
to the Internet
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Network - Intranet / Internet
Internet
LAN Server
Web Server
Software:
- Proxy Server
- Cache Server
- Gateway Server
- Firewall Server
- Router
- Switch
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