1. e-business and Information Systems
Computer Networks
Local Area Network (LAN)
Intranet
Internet
Extranet
3/5/2002
e-business and Information Systems

2. e-business and Information Systems
Local Area Network
Two or more computers
Connected
cable
hub/switch
Small physical area
home
office
small group of buildings
school
airport
3/5/2002
e-business and Information Systems

3. e-business and Information Systems
Networking Devices
cable
hub
switch
network interface card (NIC)
wireless
bluetooth (30 feet)
WiFi (300 feet)
WiMax (30 miles)
3/5/2002
e-business and Information Systems

4. e-business and Information Systems
Cables
Coaxial cable
Ethernet cable
3/5/2002
e-business and Information Systems

5. e-business and Information Systems
Coaxial Cable
cable TV
3/5/2002
e-business and Information Systems

6. e-business and Information Systems
Ethernet Cable
4 twisted pairs
8 pins plug
3/5/2002
e-business and Information Systems

7. e-business and Information Systems
Hub/Switch
Ports
3/5/2002
e-business and Information Systems

8. Computer Networking Topologies
Bus topology
Ring topology
Star topology
Tree topology
3/5/2002
e-business and Information Systems

9. e-business and Information Systems
Bus Topology
common backbone
interface connector
broadcast message
3/5/2002
e-business and Information Systems

10. e-business and Information Systems
Ring Topology
exactly two neighbors
same direction
3/5/2002
e-business and Information Systems

11. e-business and Information Systems
Star Topology
central connection
hub/switch
3/5/2002
e-business and Information Systems

12. e-business and Information Systems
Tree Topology
Bus topology
Star topology
3/5/2002
e-business and Information Systems

13. e-business and Information Systems
Internetworking
Two or more networks
heterogeneous
different configurations
router
two or more NIC
gateways
Hop
router
3/5/2002
e-business and Information Systems

14. e-business and Information Systems
Extranet
private network
internet protocol
Virtual Private Network (VPN)
3/5/2002
e-business and Information Systems

15. Communication Protocol
TCP/IP
MAC (Media Access Control) address
64-bit
NIC
assigned by manufacturer
stored in ROM or firmware
usually includes manufacturer's registered ID
3/5/2002
e-business and Information Systems

16. Computer Network Configuration
Terminologies
Host IP
Gateway IP
Subnet Mask
Network Related Commands (DOS/Windows)
ipconfig
ping
nslookup
tracert
3/5/2002
e-business and Information Systems

17. e-business and Information Systems
Local Area Network
Unique host IP address x
Same gateway IP address
Same network subnet mask
3/5/2002
e-business and Information Systems

18. LAN Segment A Configuration
node 1 IP:
node 2 IP:
node 3 IP:
gateway IP:
subnet mask:
3/5/2002
e-business and Information Systems

19. LAN Segment B Configuration
node 1 IP:
node 2 IP:
node 3 IP:
gateway IP:
subnet mask:
3/5/2002
e-business and Information Systems

20. Internetworking Example
3/5/2002
e-business and Information Systems

21. e-business and Information Systems
Packets Hop
at router
from one gateway to another gateway
3/5/2002
e-business and Information Systems

22. Computer Network Management Commands
Network Related Commands (DOS/Windows)
ipconfig
ping
nslookup
tracert
3/5/2002
e-business and Information Systems

23. Intranet, Internet, and Extranet
3/5/2002
e-business and Information Systems