Unit 4- Networks

 Identify what a network is.  Describe the benefits of a network.  Identify ways to connect to a network.  Compare & contrast a client-server network and a peer to peer network.  Describe a LAN.  Describe a WAN.  Describe the Internet  Compare & contrast an Intranet & Extranet.

 Computers need to communicate with each other  2 or more connected devices ◦ Share files & resources  Standards allowed them to “speak the same language”

 Central Storage of files  Share files, resources, printers  Maintain network centrally  Secure  Backup

 Unauthorized shared data  Network failure  Easy to spread malicious programs & viruses  Loss of privacy

 NIC  Ethernet Cable  Wireless NIC  Router  Cable/DSL/FiOS Modem

 Used in business/schools  Computers & devices connect to a server

 Used at home (NO SERVER)  Router allows devices to connect to each other  Also allows shared Internet connection

 Comcast Cable Modem ◦ Through cable TV wire ◦ High Speed Broadband  Verizon DSL ◦ Over phone line ◦ High Speed Broadband ◦ Limited distance  Verizon FiOS ◦ Over fiber cable line ◦ High Speed Broadband ◦ Limited areas

 Look at Modem’s WAN or INTERNET port  Comcast ◦ Coax Cable Wire  Verizon DSL ◦ DSL Modem connects to Phone Jack ◦ Filters on phones  Verizon FiOS ◦ Cable Wire  Dial-Up ◦ Computer modem to phone jack

 What Do You Have at Home?  Identify your Internet connection  Add a diagram to your “My Computer” PPT ◦ Use pictures of your devices ◦ Show wired & wireless connections ◦ Show modems/routers and how they connect ◦ Don’t forget cell phones, TV’s, video games, tablets, thermostats, etc.

 LAN ◦ Local Area Network ◦ Devices connected in small area ◦ This classroom, this school, your house

 WAN ◦ Wide Area Network ◦ Connects LANs ◦ Over a large geographic area

 Originally for government  Largest network  What’s the most commonly used feature on the Internet? ◦ ◦ is stored on a server  NOT ON PC

 What device allows the sharing of Internet access? ◦ Router  What is the purpose of a network? ◦ Sharing files & resources  How many wires are in an Ethernet cable? ◦8◦8  What does LAN stand for? ◦ Local Area Network

 Looks like Internet  Private ◦ Only works w/in company network ◦ Great security  Handbooks, forms, news, policies

 Private ◦ Allows outside organization to access internal info ◦ Extension of intranet  Outside suppliers  Employees  Strict security ◦ Username & password

End of Day Two  A room of 5 connected computers describes a… ◦ LAN  To connect to a network, your PC must have a… ◦ NIC  This type of “Internet” is for internal use only within a business. ◦ Intranet

Unit 4- Networks