Network Infrastructure
Module Overview Network Architecture Standards Local Area Networking Wide Area Networking Wireless Networking Remote Access
Network Architecture Standards Network Components and Terminology Network Architecture Network Media Access Control Methods IEEE 802 Standards
Network Components and Terminology Data Node Client Server Peer Network adapter Hub Switch Router Media Transport protocol Bandwidth
Network Architecture Most common network architecture types: Ethernet FDDI Token ring
Network Media Access Control Methods Action CSMA/CD Checks for media availability Sends data Resolves collisions CSMA/CA Monitors media availability constantly Advertises intent to send Token passing Listens for token Packages data with token Confirms delivery when token returns
IEEE 802 Standards IEEE 802 standards: IEEE 802.3 – Ethernet networks IEEE 802.5 – Token ring networks IEEE 802.11 – Local wireless networks IEEE 802.16 – Broadband wireless networks
Local Area Networking What Is a LAN? How Nodes on a LAN Communicate Physical Components of a LAN LAN Physical Topologies
A LAN is the most common form of computer network What Is a LAN? A LAN is the most common form of computer network
How Nodes on a LAN Communicate 00-22-FB-8A-41-64 00-B0-D0-86-BB-F7
Physical Components of a LAN Network adapter Wiring Hub/Switch Termination point Wiring cabinet
LAN Physical Topologies Bus Ring Star Hybrid Mesh
Wide Area Networking What Is a WAN? Physical WAN Components What Are the WAN Standards? What Are the T-Carrier and E-Carrier Standards? Optical Carrier Standards What Is ISDN? Connecting to the Internet with WAN Components
What Is a WAN? LAN LAN LAN LAN
Physical WAN Components Bridge Router Leased line Backbone
What Are the WAN Standards? T-Carrier E-Carrier Optical Carrier (OC-X) ISDN
What Are the T-Carrier and E-Carrier Standards? T-Carrier standards are: E-Carrier standards are: Used in North America Used globally except North America Standard Bandwidth Typical Media T1 1.544Mbps Copper T3 44.736Mbps Fiber E1 2.048Mbps E3 34.368Mbps
Optical Carrier Standards Bandwidth OC-1 51.84Mbps OC-3 155.52Mbps OC-12 622.08Mbps OC-24 1244.16Mbps OC-48 2488.32Mbps OC-192 9953.28Mbps OC-768 39,813.12Mbps
What Is ISDN? ISDN is: 128Kbps BRI Dial-on-demand 1.536Mbps PRI Typically used as a backup connection Standard Bandwidth BRI 128Kbps PRI 1.536Mbps
Connecting to the Internet with WAN Components Common technologies used: DSL modem LAN Cable modem Analog modem Internet Modem LAN
Wireless Networking Wireless Networking Components Wireless Standards and Protocols What Is 802.11? Securing Wireless Networks
Wireless Networking Components Ad hoc Network Wireless network adapter Access point Ad Hoc network Infrastructure network Infrastructure Network SSID
Wireless Standards and Protocols 802.11 - Wireless LAN 802.16 - Wireless WAN
What Is 802.11? Wireless LAN standards: Common versions: 802.11a 802.11b 802.11g 802.11n
Securing Wireless Networks Common encryption methods: WEP WiFi Protected Access (WPAv1 and WPAv2) WPA-PSK (Shared key) WPA-Enterprise (Per-user keys) Other methods: MAC filtering Smart cards and USB tokens Hidden SSID
Remote Access What Is Remote Access? Encryption and Authentication Virtual Private Networks RADIUS
What Is Remote Access? LAN Internet Remote Client Remote Client
Encryption and Authentication Encryption is: Scrambling data to prevent unauthorized access Authentication is: Providing a means of verifying the identity of a user or node
Virtual Private Networks VPN Server Corporate LAN Internet Tunnel VPN Client
RADIUS: Remote Authentication Dial In User Service RADIUS key functions: Authenticate Authorize Account
Summary Network Architecture Standards Local Area Networking Wide Area Networking Wireless Networking Remote Access