1. Network Infrastructure

2. Module Overview Network Architecture Standards Local Area Networking
Wide Area Networking
Wireless Networking
Remote Access

3. Network Architecture Standards
Network Components and Terminology
Network Architecture
Network Media Access Control Methods
IEEE 802 Standards

4. Network Components and Terminology
Data
Node
Client
Server
Peer
Network adapter
Hub
Switch
Router
Media
Transport protocol
Bandwidth

5. Network Architecture Most common network architecture types: Ethernet
FDDI
Token ring

6. 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

7. IEEE 802 Standards IEEE 802 standards: IEEE 802.3 – Ethernet networks
IEEE – Token ring networks
IEEE – Local wireless networks
IEEE – Broadband wireless networks

8. Local Area Networking What Is a LAN? How Nodes on a LAN Communicate
Physical Components of a LAN
LAN Physical Topologies

9. A LAN is the most common form of computer network
What Is a LAN?
A LAN is the most common form of computer network

10. How Nodes on a LAN Communicate
00-22-FB-8A-41-64
00-B0-D0-86-BB-F7

11. Physical Components of a LAN
Network adapter
Wiring
Hub/Switch
Termination point
Wiring cabinet

12. LAN Physical Topologies
Bus
Ring
Star
Hybrid
Mesh

13. 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

14. What Is a WAN?
LAN
LAN
LAN
LAN

15. Physical WAN Components
Bridge
Router
Leased line
Backbone

16. What Are the WAN Standards?
T-Carrier
E-Carrier
Optical Carrier (OC-X)
ISDN

17. 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

18. Optical Carrier Standards
Bandwidth
OC-1
51.84Mbps
OC-3
155.52Mbps
OC-12
622.08Mbps
OC-24
Mbps
OC-48
Mbps
OC-192
Mbps
OC-768
39,813.12Mbps

19. 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

20. Connecting to the Internet with WAN Components
Common technologies used:
DSL modem
LAN
Cable modem
Analog modem
Internet
Modem
LAN

21. Wireless Networking Wireless Networking Components
Wireless Standards and Protocols
What Is ?
Securing Wireless Networks

22. Wireless Networking Components
Ad hoc Network
Wireless network adapter
Access point
Ad Hoc network
Infrastructure network
Infrastructure Network
SSID

23. Wireless Standards and Protocols
Wireless LAN
Wireless WAN

24. What Is 802.11? Wireless LAN standards: Common versions: 802.11a
802.11b
802.11g
802.11n

25. 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

26. Remote Access What Is Remote Access? Encryption and Authentication
Virtual Private Networks
RADIUS

27. What Is Remote Access?
LAN
Internet
Remote Client
Remote Client

28. 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

29. Virtual Private Networks
VPN Server
Corporate LAN
Internet
Tunnel
VPN Client

30. RADIUS: Remote Authentication Dial In User Service
RADIUS key functions:
Authenticate
Authorize
Account

31. Summary Network Architecture Standards Local Area Networking
Wide Area Networking
Wireless Networking
Remote Access