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Computer Networking Basics

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Basic

An example of protocol: http(protocol)://www.website.org(server name)/index.php(file name).

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Topology

When setting up network, there are a few Topology(the layout of a network) to choose from.

  1. Bus topology required a terminator and is cheap but easy to break.
  2. Ring topology is more expensive than bus but “stronger” as well.
  3. Star is the most common topology as it costs less and is easy to expand, device are independent in terms of sending signal but once the router/switch breaks, the whole things went down.
  4. Mesh on the other hand, handles the problem but is much more expansive to set up and expand. Mesh is often use in MAN and WAN.

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OSI model

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Devices

INTERNET-connect-modem-connect-(Home Network)router-connect-devices

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IP Address

A short hand of IP address and subnet mask is 108.2.2.74/20(CIDR, means write 1 for 20 times in subnet).

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DHCP and DNS

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Other topic in the tutorial

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