Chapter 6 quiz-Notes

A dial-up connection is a fixed internet connection that uses a voice band modem and telephone lines to transport data between your computer and your ISP.
Most Modems use a standard called V.90 to provide a theoretical maximum speed of 56 Kbps.
Dial-up connections are asymmetrical 44kbps is a typical downstream speed for 56 kbps modem.
ISDN, the data rate drops to about, 33, kbps or less.
DSL is a fixed, symmetric internet conection that moves data at speeds of 64 kbps or 128 kbps over ordinary telephone lines through a device called a terminal adapter, which sends digital signals.
Cable is high-speed, digital always on, interenet access technology that runs over a standard telephone line.
DISHdistributing always on broadband internet access over the same infrastructure that offers cable television service.

to be continued

Notes for Test-10-5-09

FTP=File transfer proctocol=provides a way to transfer files from one computer to another over any TCP/IP network.
The internet is not owned or operated by any single corporation or government.
The Internet backbone is a network of high capacity communications links that provides the main routes for data traffic across the Internet. Backbone links and routers are maintained by network service providers (NAPs).
An internet service provider ISP is a company that offers Internet Access to individuals, businesses, and smaller ISPs.
An ISP operates routers, communication equipment, and other network devices that handle the physical aspects of transmitting and receiving data between their subscribers and the Internet.

TCP/IP is the primary protocol suite responsible for message transmission on the Internet.
A protocol suite is a combination of protocols that work together.
TCP breaks a message or file into packets.
IP= is responsible for addressing packets so that they can be routed to their destination.
Every device on the internet has an assigned IP address, , 10 digits, called an octet.
A permanently assigned static IP address, or a
Temporary assigned IP dynamic IP address
to be continuted.

One of the most effective steps you can take to secure your computer from instrusions is to install a router.  Even if you only have one computer , a router can tie a LAN together and provide a portal to the Internet.

Routers are intented to work on LANs to monitor and direct packets being transported from one device to another, it  can also conect to the internet through DSL, cable, or satellite modem.

Routers screen IP addressed packets within the LAN so that they are delivered without traveling a circuitous route over the Internet and back.

Your router has it’s own IP address,   the key point about your router’s IP address is that it is routable.  A Routable IP address can be accessed by packets on the Internet.

A private IP address is a non-routable IP address that can be used within a LAN, but not for internet data transport.