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Chapter 1
NETWORKING BASICS
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)
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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
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Chapter 1: NETWORKING BASICS
EXAMPLE OF A LAN
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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
Chapter 1: NETWORKING BASICS
EXAMPLE OF A WAN
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PROTOCOLS AND SERVICES

Facilitate communication between two networked
devices

Perform data encapsulation

Provide a common language to communicating
devices

Provide either connectionless or connectionoriented services
Chapter 1: NETWORKING BASICS
CONNECTIONLESS VS. CONNECTIONORIENTED


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
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Chapter 1: NETWORKING BASICS
PHYSICAL LAYER TRANSMISSION
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Chapter 1: NETWORKING BASICS
NETWORK LAYER ADDRESSING
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Chapter 1: NETWORKING BASICS
ROUTING
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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.