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Networks and mobile devices

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Presentation on theme: "Networks and mobile devices"— Presentation transcript:

1 Networks and mobile devices
Unit 9b 2-3 days.

2 Objectives Understand the benefits of networking
How to obtain Internet service LAN hardware and addressing WiFi connections and security How to obtain cellular service How smartphones and tablets connect to the Internet

3 Networks 2 or more connected devices Share files
Share resources like printers Share Internet connection

4 Internet Connection Sharing
Small hone network benefits Stream audio/video to devices, share stored media, share and backup files, play games online Downloading Copying a file from the Internet to you in one process Have access to file when you have no Internet connection Can take time to download & you need enough storage Streaming File delivered to you in a constant stream File NOT copied to your computer Need Internet connection

5 Basic Networks When sending data across a network:
Data sent in small packets Packets can take different “roads” to get to destination Packets reassembled at destination This process is TCP/IP A set of rules to transmit data & communicate

6 Network Types- LAN Local Area Network WLAN In a small area
Office, school, house Is a private network WLAN Wireless Need Wi-Fi card WLAN was also displayed as WAN (Wireless Area Network) on the certification test. WLAN is the correct initials.

7 Network Types- WAN Wide Area Network Large geographic area
Two or more LANs connected by routers Big businesses with office around country or world Internet is biggest WAN Connected by fiber, satellites, telephone WANs are public networks

8 IP Addresses Each device has a unique IP Address to communicate on a network A web site name is actually an IP address IPv4 & IPv6

9 Finding Your IP Address
Command Prompt, type ipconfig Control Panel, View Network Status, Click Connection, Click Details Do this on the classroom computer.

10 Obtaining Internet Service
Internet Service Provider (ISP) Phone company (Verizon) Cable company (Comcast) Satellite company (HughesNet) Broadband connection Always on Can carry other signals on cable Types of broadband connections DSL, Cable, FiOS, Satellite Broadband- cable carries phone, TV and Internet on one cable Obviously costs money

11 Which Should You Choose?
Upload & Download speeds What will you be doing? Gaming, Videos What’s available? For Home Use: Download speeds are usually MUCH HIGHER than upload speeds. Some other ISPs have data caps. Watch for overages. Watch for contracts.

12 What Affects Internet Speed?
Connection type Peak time usage Wireless interference Microwaves, older cordless phones, walls, other Wi-Fi devices Type of equipment Old, outdated modem or router

13 Activity- Test Your Internet Speeds
Always test from a wired connection Speedtest.net Testmy.net Speedtest.xfinity.com What are your download & upload speeds?

14 Review- 3Q Every computer needs an ___ & ____ to communicate on a network. IP address & MAC address How would you describe Broadband Internet? High speed, always on What household devices can interfere with Wi-Fi signals? Microwaves, cordless phones, other Wi-Fi devices What protocol sets the rules for network communication? TCP/IP

15 Review- 3Q At Starbucks, you can access the Internet with your laptop & no wires. What type of network is this? WLAN A _______ is confined to a limited geographical area. LAN A _______ is made up of several local area networks connected together. WAN

16 Modems Modulate-Demodulate DSL, Cable Modems, Combo Modem/Router
Digital to analog/analog to digital Allows data to be transmitted over a line and changed from one signal to another Connects LAN to a WAN DSL, Cable Modems, Combo Modem/Router

17 Broadband Cable Modem Data over Coaxial (Coax) cable
High speed, always on Broadband 20Mbps (Megabits per second) & up FiOS also connects via coaxial cable.

18 Cable Modem Hookup

19 DSL Modem Digital Subscriber Line High speed, always on
Broadband Through phone lines 1.5-3Mbps Can use phone & Internet at same time Filters on phones

20 DSL Modem Hookup

21 Switch, Router, Multipurpose Device
Better & faster than a hub Built into back of these routers Router/Multipurpose Device Connects computers Shares one Internet connection May allows wireless access Firewall Wireless Adapters or NIC Mention Switch on back. Also show/talk about hub.

22 How They Connect

23 Public & Private IP Addresses
Private IP used within a LAN Unique within LAN Public IP is connected to Internet Unique everywhere IP Addresses are NOT permanent. You get them for a limited time but they renew.

24 Review- 4Q Which Internet connection sends high speed broadband over analog phone lines? DSL If a coax cable connects to your modem, which Internet service do you have? Cable modem or FiOS Every computer needs an ___ & ____ to communicate on a network. IP address & MAC address The 4 LAN ports on the back of a home router is really what device? Switch

25 Wired Ethernet Connections
Fastest & most secure in LAN Gigabit Ethernet- 1Gbps (1000Mbps) Fast Ethernet- 100 Mbps Cables Cat 5, 5e, 6, 6a 100m max distance Faster speeds as you go up Connects to NIC Best reliability & fastest connection Check your wired LAN speed in Network & Sharing Center. Check NIC speed capability. Can only go as fast as slowest connection between the two.

26 Wireless Connections- WiFi
Need a WiFi adapter Built-in or USB port 2.4GHz or 5GHz Signal weakens farther away you are

27 Wireless Standards & Security
WiFi Standard Top Speed Frequency A 54Mbps 5GHz B 11Mbps 2.4GHz G N 450Mbps 2.4GHz & 5GHz (Dual Band) AC 1.3Gbps 5GHz (Dual Band available) Wireless authentication is the passphrase/password you use to connect to the wireless network. The encryption scrambles the data between the wireless device and the wireless router. Wireless Encryption Information WEP Oldest & weakest WPA Old but better than WEP WPA2 Current & strongest

28 Connect to WiFi Click on icon, select connection, enter passphrase
PC & handheld devices WiFi Protected Setup (WPS) button Press button on router, then device Sets connection automatically Benefits of connecting to WiFI: Ability to connect & communicate with other devices on the same and other networks Can remember the WiFi connection so you can connect automatically

29 Review- 4Q What wireless standard is the fastest & the max speed?
AC, 1.3Gbps What is the most secure wireless encryption? WPA2 What is the weakest wireless encryption? WEP What are the two wireless frequencies used? 2.4GHz & 5GHz

30 Cellular Networks Sends voice, text, data through towers
Hubs connect to landline & Internet Cell Networks Information 3G Up to 2Mbps speed 4G Very high speeds but none exist LTE Current; up to 100Mbps Newer phone usually support both GSM & CDMA Watch out for roaming costs or no service areas Cell Carriers Information GSM Use SIM card with phone # & account holder information CMDA Use phone’s ESN to identify phone Pre-Paid Rents some towers off of major carriers

31 Getting Cell Service Talk, Text, Data Plans Contract- 24 months
Per line ETF if you cancel Pre-Paid Good if you have no credit or bad credit No activation fee Pay month to month Disadvantage of cellular Tablet: tablet costs more than wifi tablet and you have to pay data A cellular Tablet CAN connect to any wifi network without paying extra for data.

32 Activity Teknimedia A2.8- Networks A2.16- Networks
A2.17- Phones & tablets A2.19- Quiz A2.21- Security A2.22- Trubleshooting A3.22- Connecting to Wireless

33 Networks and mobile devices
Unit 9b 2-3 days.

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