1. Chapter 2 Overview of Networking Components

2. Chapter 2 Overview Comparing unicast, broadcast, and multicast traffic
Understanding network hardware
Exploring protocols and services
Understanding basic topologies 2

3. Comparing Unicast, Broadcast, and Multicast Traffic
Data transmitted over a network
IP addresses used as addresses
For example,
Wired networks
IEEE (Ethernet)
Wireless networks
IEEE 3

4. Understanding Unicast Traffic
Traffic sent from one system to one other system
One-to-one 4

5. Data Names
Packets
Frames
Datagrams
Protocol data units (PDUs) 5

6. Understanding Broadcast Traffic
Traffic sent from one system to all other systems on a subnet
One-to-all 6

7. Routers and Broadcasts
Routers don’t pass broadcast
Routers separate subnets
Broadcasts aren’t passed from subnet to another
Some exceptions
For example DHCP (using a special type of broadcast) 7

8. Understanding Multicast Traffic
Traffic sent from one system to many other systems
One-to-many 8

9. Understanding Network Hardware
Collision domain
Broadcast domain
Switches
Create separate collision domains
Routers
Create separate broadcast domains 9

10. Understanding Hubs
Four-port hub 10

11. Understanding Switches
Four-port switch 11

12. Understanding Bridges
Four-port bridge creating four collision separate domains 12

13. Understanding Routers
Two subnets connected by a router 13

14. Understanding Routers
Network with multiple subnets separated by routers 14

15. Routers and Default Gateways
Near side of the router 15

16. Understanding Firewalls
Network-based and host-based firewalls 16

17. Understanding Media
Straight-through cable 17

18. Understanding Media
Crossover cable
Use for like devices 18

19. Exploring Protocols and Services
Provide the rules for communication
Must be configured properly
TCP/IP protocol suite
Multiple protocols
Used on the Internet
Used in Microsoft networks 19

20. Exploring Protocols and Services
Services applet 20

21. Exploring Protocols and Services
Service startup types
Automatic
Automatic (Delayed Start)
Manual
Disabled 21

22. Understanding Basic Topologies
Internet
Extranet
Intranet
Perimeter Network 22

23. Understanding Basic Topologies
Internet
Public network 23

24. Understanding Basic Topologies
Intranet
Organization's internal network 24

25. Understanding Basic Topologies
Perimeter Network (DMZ)
Between Internet and intranet 25

26. Understanding Basic Topologies
Extranet
For trusted entities 26

27. Chapter 2 Summary Comparing unicast, broadcast, and multicast traffic
Understanding network hardware
Exploring protocols and services
Understanding basic topologies 27