1. Chapter 1
NETWORKING BASICS

2. Chapter 1: NETWORKING BASICS
LANS, WANS, AND MANS
Three main networking technologies are used to connect computers and networks together:
Local area network (LAN)
Wide area network (WAN)
Metropolitan area network (MAN)

3. Chapter 1: NETWORKING BASICS
LAN
Used to network computers located in a limited geographical area such as a room, floor, or building
Has three main attributes
Topology: bus, star, and ring
Medium: copper, fiber, and wireless
Protocols

4. Chapter 1: NETWORKING BASICS
EXAMPLE OF A LAN

5. Chapter 1: NETWORKING BASICS
WAN
Spans a large geographic area
Defined as an internetwork (private or public) that connects many LANs
Uses routers and usually point-to-point links
Examples of WANs
The Internet
Private global enterprise networks

6. Chapter 1: NETWORKING BASICS
EXAMPLE OF A WAN

7. PROTOCOLS AND SERVICES
Chapter 1: NETWORKING BASICS
PROTOCOLS AND SERVICES
Facilitate communication between two networked devices
Perform data encapsulation
Provide a common language to communicating devices
Provide either connectionless or connection-oriented services

8. CONNECTIONLESS VS. CONNECTION-ORIENTED
Chapter 1: NETWORKING BASICS
CONNECTIONLESS VS. CONNECTION-ORIENTED
Connectionless protocols
Do not require a connection
Have very little overhead
Are fast and unreliable
Connection-oriented protocols
Require a connection
Require more overhead
Are slower and very reliable

9. PHYSICAL LAYER TRANSMISSION
Chapter 1: NETWORKING BASICS
PHYSICAL LAYER TRANSMISSION

10. NETWORK LAYER ADDRESSING
Chapter 1: NETWORKING BASICS
NETWORK LAYER ADDRESSING

11. Chapter 1: NETWORKING BASICS
ROUTING

12. Chapter 1: NETWORKING BASICS
SUMMARY
LANs, WANs, and MANs allow groups of computers to share information.
Signaling protocols are used to transmit data as 1s and 0s.
Protocols provide a common language for communication hosts.