This document discusses different types of computer networks. It describes local area networks (LANs) that connect devices within a small geographic area like a home or office using technologies like Ethernet or WiFi. Wide area networks (WANs) are discussed as covering a larger geographic area using technologies like MPLS, ATM, or Frame Relay. The document also summarizes wireless networks including personal (PAN), local (LAN), and metropolitan/wide area networks. The Internet is introduced as a worldwide system of interconnected computer networks that allows users to access information from any computer.

1. Introduction
Master Class 2
Network types & Internet
Josep Bardallo - 2012

2. 29 / 10 / 2012Josep Bardallo
Network
 “A computer network, or simply a network, is a collection of
computers and other hardware components interconnected by
communication channels that allow sharing of resources and
information”

3. 39 / 10 / 2012Josep Bardallo
Network Types. By geographical scope.
 Local Area Networks (LAN)
 Personal Area Networks (PAN)
 Home Area Networks (HAN)
 Wide Area Networks (WAN)
 Campus Networks
 Metropolitan Area Networks (MAN)
 Enterprise Private Networks
 Backbone Networks (BBN)
 Global Area Networks (GAN)
 NFC
 Internet
 ……………

4. 49 / 10 / 2012Josep Bardallo
Network types: Public or dedicated networks.
Remote Workers
HeadQuarters
Mobile
Workers
Business Sites
?
Home workers
Regional
offices
Branch offices
Remote office
?
Privates lines
?
IP Network
(i.e Internet)

5. 5
 “Private Network” using Public Networks. There are a lot of encryption technologies
used. Most common today: VPN-SSL
9 / 10 / 2012Josep Bardallo
Network types: VPN (Virtual private Network).
Internet
TunnelingTunneling
L2FL2F
L2TPL2TP
PPTPPPTP
GRE (L3)GRE (L3)
IPSECIPSEC
SSLSSL
EncriptedEncripted
RC4RC4
DESDES
AESAES

6. 69 / 10 / 2012Josep Bardallo
Network types: Wireless Networks.
 Not connected by cables.
 Types:
 PAN (personal) : Bluetooth,
NFC, etc.
 LAN : Wi-Fi (IEEE 802.11
standard)
 MAN and WAN: Wi-Max
(802.16) and others
technologies
 Cellular: GSM, etc

7. 79 / 10 / 2012Josep Bardallo
Network types: Wireless Networks capacity.

8. 89 / 10 / 2012Josep Bardallo
Network types: Wireless Networks evolution.

9. 99 / 10 / 2012Josep Bardallo
Wide area network (WAN).
 Covering a large geographical Area. A large variety of technologies
Mobile Users
Telecommuters
Branch
Sites
Partners
Customers
MPLS
ATM
Frame Relay
Leased
Lines
IP-VPN
Internet

10. 109 / 10 / 2012Josep Bardallo
LAN: Local Area Networks.
 Higher data transfer rates, smaller geographic range, and no need for leased
telecommunication lines
 Ethernet (wired) or Wi-fi technologies used

11. 119 / 10 / 2012Josep Bardallo
LAN: Local Area Networks. Ethernet.
 Up to 100 Gb/s rates
 Devices used: Switches, network cards, hubs (obsolete)

12. 129 / 10 / 2012Josep Bardallo
Intranet / Extranet / Internet
 Intranet is the generic term for a collection of private computer networks within an
organization.
 Extranet is a computer network that allows controlled access from the outside for
specific business or educational purposes.

13. 139 / 10 / 2012Josep Bardallo
Internet
 Internet is a worldwide system of computer networks - a network of networks - in which
users at any one computer can get information from any other computer. The most used
services is Web (www), but there also other services like ftp, email, news, etc.
 Created in 1969 in USA based on ARPANET

14. 149 / 10 / 2012Josep Bardallo
Internet: Networks and basic systems
 Internet is based in interconnected networks and core systems

15. 159 / 10 / 2012Josep Bardallo
Internet: new …. But fast growing
The commercial Internet is now about 20 years old

16. 169 / 10 / 2012Josep Bardallo
Internet Devices : Is a fact, mobile is the present

17. 179 / 10 / 2012Josep Bardallo
Internet devices: mobile networks are growing

18. 189 / 10 / 2012Josep Bardallo
Internet access in the future: Wireless

19. 199 / 10 / 2012Josep Bardallo
Mobile growing faster in Asia (India) & Africa

20. 209 / 10 / 2012Josep Bardallo
Mobile, Internet & new business
Growth of mobile
more applications
New Business opportunities

21. 219 / 10 / 2012Josep Bardallo
Network convergence
 Network convergence refers to the provision of telephone, video and data
communication services within a single network.