What
is a Network
Network is a collection of devices that can
communicate together.
Internet
Most people use it as backup;
it’s not secure, not even so fast as compared to WAN service provider such
AT&T setup. So a lot of agencies use
dedicated WAN and buy a private WAN link. Here we get a fast link, guaranteed
services; we have a maintained link that never really goes down. The only
problem in this case is cost.
Due to this cost some
people prefer internet, while other prefer private WAN.
Applications
that use Network
Web browsers and
FTP
(Companies
also have intranet, rather than internet. Intranet is just like an internet
sort of system inside the Organization that has private data such as corporate
financial information like information of shipping that is coming in and out of
the company, employee phones list, we can access our organization own web pages
from internal web server and can download all that into a web browsers.)
Database
Application
Instant
messengers.
Email
Online
games.
Considerations for
network application are
Speed
Delay
Availability
LAN
links Speed
10
Mbps
100
Mbps
1000
Mbps (1Gbps)
WAN
links Speed (are
usually slow than LAN connection)
56
Kbps (still in some parts of the world).
T1
line (1.544 Mbps)
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