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Fast ways to reduce business costs
Do you need ways to reduce business costs?
Well, there are many ways to cut them...let me show you how to
get nice results.
Wholesale/Bulk... You'll save money buying your business
supplies in bulk quantities. You could get a membership...
Link Building for a New Web Site
Link building is such an important area of owning a business
website. It's a great way to promote your site and your
business. And it is also critical for search engine rankings.
Think of link building as networking for your site. The...
The Complete Guide To Spotting Computer Spies & Recording Devices
Can you be absolutely sure, that your activity isn't being monitored and recorded right now, while you're reading this?
The problem with many people is, because they're alone in a room with their computer, they think that no body can be watching....
Why Learning The OSI Model Is Important - And Not Just For Exams!
There's nothing I enjoy more than teaching Cisco technologies, especially CCNA candidates. Whether it's in-person or online, everyone's excited to be there. There's a sense of anticipation in the air, and everyone is ready to work hard, get their...
Wireless Alphabet Soup: What's the Difference Anyway?
At this point, you might have read a few feature lists for
wireless cards, and you're about to ask a very common question:
what's the difference anyway? Well, answering that question
requires a brief rundown of the history of wireless...
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Internetworking Overview
Internetworking:
Internetworking involves connecting two or more computer
network with some sort of routing device to exchange traffic
back and froth, and to guide traffic on the correct path across
the complete network to their destination . Connecting together
two or more networks with bridges sometimes inaccurately refer
to as internetworking ,but the resulting system is a single
subnetwork ,and users require no internetworking protocol, such
as IP,to traverse it. Briefly, I will present :Network Layers,
Tunneling technique .-which are misunderstood terms in computer
network-
Network layers:
1.physical layer (Repeaters & Hubs): They just move the bit from
one network to an identical network. these are mostly analog
devices and do not understand any thing about digital
protocols(regenerate singles)
2.Data link layer (Bridges & switches): They accept frames
,examine MAC addresses and forward the frames to different
networks ,doing minor protocol translation.
3.Network Layer (Routers): They can connect two networks and do
packet translation ,but translation is increasingly rare.
4.Transport Layer(Transport Gateways): They can interface
between two transport connection
.For example ,allow packets to
flow between a TCP network and SAN network.
5.Application Layer (Application Gateways): They translate
message semantics for the data being moved, such as parsing and
changing header fields between an Internet e-mail and X.400
e-mail.
How Network Differ?
Networks can differ in many ways: 1.They may differ in their
Physical layer :by having different modulation technologies.
2.they may differ in their data link layer by: having different
frame format. 3.they may differ in their network layer by:
having different internetworking protocols.
Networks can be connected by different devices according to the
level of connection.
Tunneling: Tunneling is a technique used for passing information
between two networks of the same type of network, but there is a
different network in between. When the router gets the frame, it
pulls the IP packet out of the frame and drops it into the
payload field of anther frame to send across the WAN. this is
undone at the other end ,allowing the data to be received on the
other end.-More about Tunneling later-
To Be Cont .. T. M . Harahsheh
About the author:
Jordan
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