Download - Network Dieter W. Storr
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Network
Dieter W. StorrJanuary 2002
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How can I connect two PC’s ?
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Network - Contents
BasicsKVM Switch NetworkWireless NetworkOSI Reference ModelIntranet / 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 widely-
installed 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
Ethernet10BASE-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
Ethernet100BASE-T or Fast Ethernet provides
transmission speeds up to 100 megabits per second and is typically used for LAN backbone systems, supporting workstations with 10BASE-T 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 ringA 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 token-passing 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 ringSecond 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-of-
presence. 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 LANMobilityCost SavingsDisaster RecoveryConcerns
Radio signal interference, power management, system interoperability, network security, connection problems, installation issues, health risks
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Network - Basics
NOS - Network Operating SystemArtisoft's LANtastic, Banyan VINES, Novell's NetWare, and Microsoft's LAN ManagerNetware, MS NT ServerOne 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 PlatformControl 2 and more
computers from one console. Price starts at $74.99Cable 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 RouterTwo Desktop Network
PCI CardsTwo 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
DSL Gateway RouterNAT Firewall
LAN Server
Internet
All Servers have accessto the Internet
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Network - Intranet / Internet
LAN Server
Internet
Web Server
Software:- Proxy Server- Cache Server- Gateway Server- Firewall Server- Router- Switch