Chapter Two: Internet Fundamentals: Operations, Management, the Web, and Wireless. By: Laura Marshall, Mary Mauro, and Doug Moore. “The Internet IS for everyone- but it won't be unless WE make it so.". Quote from Vinton Cerf, co-founder of the Internet.
By: Laura Marshall, Mary Mauro, and Doug Moore
-Internet – a gigantic collection of millions of computers that allows other computers to network together and communicate. Computers are linked to the internet through ISP’s (internet service providers)
- Clients and Servers - each computer on the internet is either 1 of 2 things: a client or a server. Servers are machines that provide services to other machines. In turn, those other machines that request service are clients.
- IP Addresses - to keep all the machines straight, they are all assigned a specific unique IP (internet protocol) address. IP addresses are uniquely assigned per session – this way ISP’s can have 1 IP address per modem, not per customer.
- Domain Names – a human-worded address (i.e. www.blogger.com) that is easier to remember than an IP address (i.e. 220.127.116.11) They are broken down into three parts:
-The host name (“www”), the Domain Name (“blogger”), and the top level domain name (“.com”)
- Name Servers – a set of servers called Domain Name Servers (DNS) are simple databases that map names to IP addresses and are distributed all over the internet
- Ports –any service machine make its services available using numbered ports
- Protocols – the pre-defined way that someone who wants to use the service talks to the server.
-Fear of identity theft
-Credit Card Information, etc.