You have a growing array of ISPs to choose from, offeringa wide range of services and pricing structures. An ISP canbe a commercial business or a local university, state agency,or nonprofit organization. You can find out about ISPs inyour area through the Internet, from advertisements orthe yellow pages, and from Internet books and guides.You also will find a list of Internet service providers on...
Monday, September 8, 2014
How to Connect to the Internet
How to Connect to the InternetHow to Connect to the InternetThe Internet is a global network of thousands of computers,growing by leaps and bounds each year. It allows a worldwidecommunity comprising tens of millions...
A Wide-Area Network for a Small District
A Wide-Area Network for a Small DistrictTo improve communications between campuses and their central office, the campuses decide to install a wide-area network. The upgrade economizes on Internet connectivityby offering all campuses a connection through a central high-speed line
.
A...
Tuesday, September 2, 2014
Modems vs. Routers
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Modems vs. Routers
When choosing between modems and routers for remote
access to a central network or the Internet, consider the
following pros and cons:
Modems
• Inexpensive
• Good for one user or limited remote access for a small group
• Portable, so they can be used remotely from any location...
ISDN
ISDN
ISDN is a service that operates at 128 Kbps and is available
from your phone company. Charges for ISDN connections
usually resemble those for analog lines—you pay per call
and/or per minute, usually depending on distance. ISDN
charges also can be flat rate if linked to a local Centrex...
Analog Lines
Analog Lines
Using analog lines to dial out to other networks or to
the Internet—or to allow remote users to dial into your
network—is a straightforward solution. Most ordinary
phone lines are analog lines. Connect a modem to your
computer and to a wall jack and you’re in business. You
pay for...
Remote Access and Wide-Area Networks
Remote Access and Wide-Area Networks
LANs accommodate local users—people within a building
or on a campus. WANs connect users and LANs spread
between various sites, whether in the same city, across the
country, or around the world....
Networking Technologies Overview
Networking Technologies Overview
Ethernet has been around since the late 1970s and remains
the leading network technology for local-area networks
(LANs). (A LAN is a network contained in a building or
on a single campus.) Ethernet is based on carrier sense
multiple access with collision...
Switches
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Switches
Switches are smarter
than hubs and offer
more bandwidth. A
switch forwards data
packets only to the
appropriate port for the
intended recipient, based on information in each packet’s
header. To insulate the transmission from the other ports,
the switch establishes a temporary connection...
Hubs
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Hubs
Hubs, or repeaters, are
simple devices that interconnect
groups of users.
Hubs forward any data
packets they receive over
one port from one workstation—
including e-mail, word processing documents,
spreadsheets, graphics, or print requests—to all of their
remaining ports. All users connected...
Basic Networking Components
Basic Networking Components
Clients and Servers
Often, as a network grows and more computers are
added, one computer will act as a server—a central storage
point for files or application programs shared on the network.
Servers also provide connections to shared peripherals
such as printers....
The Building Blocks: Basic Components of Networks
The Building Blocks: Basic Components of Networks
There are as many definitions for the term “network” as there are networks. However, most people would agree that networks are collections of two or more connected computers. When their computers are joined in a network, people can share files and...
Most people wouldn’t use the terms “networking” and
“basic”in the same sentence. However, while the underlying
principles of networking are somewhat complex, building
a network can be very simple given the right tools and a basic
understanding of how they work together.
With networks, starting...
hat This Guide Can Do for You
The Building Blocks: Basic Components of Networks
Clients and Servers
Wiring and Cable
Network Interface Cards
Hubs
Margin Note: Network Management
Margin Note: Modems
Switches
Routers
Margin Note: Uninterruptible...
Cisco Networking Essentials
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Cisco Networking Essentials
Cisco Systems, Inc., the worldwide leader
in networking for the Internet, has
prepared this guide to make networking
easier for your campus or district. If
you’re new to networking, it’s an ideal
introduction, starting with the most basic of components and helping...
Monday, September 1, 2014
A Virtual Private Network
A Virtual Private Network (VPN) makes protected connections called VPN tunnels between a local client and a remote server, usually over the Internet. VPNs can be difficult to set up and keep running due to the specialized technology involved. When a VPN connection fails, the client program reports...
WAN - Wide Area Network
WAN - Wide Area Network
As the term implies, a WAN spans a large physical distance. The Internet is the largest WAN, spanning the Earth.
As the term implies, a WAN spans a large physical distance. The Internet is the
A WAN is a geographically-dispersed collection of LANs. A network device called a router connects LANs to a WAN. In IP networking, the router maintains both a LAN address and...
One way to categorize the different types of computer network designs is by their scope or scale. For historical reasons, the networking industry refers to nearly every type of design as some kind of area network. Common examples of area network types are:
LAN - Local Area Network
WLAN - Wireless Local Area Network
WAN - Wide Area Network
MAN - Metropolitan Area Network
SAN - Storage Area Network,...
Saturday, August 30, 2014
Computer Networks
Computer Networks
Wireless Networks
Communications Network
Network Computing
About Network Security
Network Traffic
Network Management
Telecommunication Network
Bus, ring and star network topology diagrams
A computer network topology is the physical communication scheme used by connected devices. These pages illustrate the common computer network topologies including bus, ring and star topology...
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