1. CS101 Lecture 9 Network Basics

2. Computers love bytes and a factor of ____ Up to now we have been using bytes as our main unit of measurement with a factor of ____ For instance storage measured in bytes –1 bit = 0 or 1 –1 bit * 8 = 8 bits = one byte –1 byte * 1024 = 1024 bytes = 1 Kilobyte –1 byte * 1024 * 1024 = 1,048,576 bytes = 1 Megabyte –1 byte * 1024 * 1024 * 1024 = 1,073,741,824 bytes = 1 Gigabyte –1 byte * 1024 * 1024 * 1024 * 1024 = 1,099,511,627,776 bytes = 1 Terabyte

3. Networks Love Bits and a Factor of 1000 Movement measured in: ____ ___ _____ (bps) –bps = How many bits go by a point in one second –Also called Data Transmission Rate 1 bps = 1 ___ per second 1bps*1000 = 1000bps = 1 ___ bit per second = 1 kbps 1bps*1000*1000 = 1,000,000bps = 1 ___ bit per second = 1 Mbps 1bps*1000 *1000*1000 = 1,000,000,000bps = 1 ___ bit per second = 1 Gbps etc

4. What is a ______? ________ = Devices connected together so that they can exchange information

5. A network needs 3 things ________ –Instructions to move information between devices Standalone software or built into most operating systems ___________ –Agree upon way to do things TCP/IP = Transmission Control Protocol/Internet Protocol __________ –Way to move information between devices Wired or Wireless

6. Home Network Software Built into the operating system since everyone wants to network related things with their computer –Windows = Control Panels > Network and Internet –Macintosh = Apple menu > System Preferences > Network

7. Home Network Protocols Handled by the networking software Since everyone wants their computer to be able to communicate with everyone else's computer we all want to use the same protocols ___/__ = ________ _______ ________/ ________ _______ –Suite of communication protocols Example = http = Hyper Text Transfer Protocol to move web pages around in an agreed upon way

8. To have a connection you need a NIC NIC = ________ _________ _____ A ___ allows a device like a computer, printer, scanner, etc, to connect to a network A ____ has a ___ address –Media Access Control address –Unique address for each item on a network Can be found in System Information under Network Adapter

9. Home network connection options Wired –________ cables Fast ______ 10Mbps/100Mbps Gigabit ______ 10Mbps/100Mbps/1000Mbps –_______ _____ Networking (electrical system) –______ _____ Networking (phone system)

10. Home network connection options Wireless –______ either _, _, _, _, _ A wireless router radios the information to devices on the network. Each device on the wireless network needs a wireless NIC card to receive and send signals.

11. If you go wireless… _________ usually is off by default Password Protect _______ –Change default password of router Turn on wireless ________ and create very long password WEP = Not quite as bad as nothing WPA = Better WPA2 = Best Think about ___ address filtering and other options. –Ready wireless router manual