CS101

Network Basics

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

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

What is a ______?

• ________ = Devices connected together so that they can exchange information

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

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

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

• ___/__ = ________ _______ ________/ ________ _______– About 100 protocols

• Example = http = Hyper Text Transfer Protocol to move web pages around in an agreed upon way

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

Home network connection options

• Wired– ________ cables

• Fast ______ 10Mbps/100Mbps• Gigabit ______ 10Mbps/100Mbps/1000Mbps

– _______ _____ Networking (electrical system)

– ______ _____ Networking (phone system)

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.

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