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Chapter 2 Overview of Networking Components
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Chapter 2 Overview Comparing unicast, broadcast, and multicast traffic
Understanding network hardware Exploring protocols and services Understanding basic topologies 2
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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
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Understanding Unicast Traffic
Traffic sent from one system to one other system One-to-one 4
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Data Names Packets Frames Datagrams Protocol data units (PDUs) 5
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Understanding Broadcast Traffic
Traffic sent from one system to all other systems on a subnet One-to-all 6
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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
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Understanding Multicast Traffic
Traffic sent from one system to many other systems One-to-many 8
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Understanding Network Hardware
Collision domain Broadcast domain Switches Create separate collision domains Routers Create separate broadcast domains 9
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Understanding Hubs Four-port hub 10
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Understanding Switches
Four-port switch 11
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Understanding Bridges
Four-port bridge creating four collision separate domains 12
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Understanding Routers
Two subnets connected by a router 13
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Understanding Routers
Network with multiple subnets separated by routers 14
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Routers and Default Gateways
Near side of the router 15
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Understanding Firewalls
Network-based and host-based firewalls 16
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Understanding Media Straight-through cable 17
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Understanding Media Crossover cable Use for like devices 18
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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
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Exploring Protocols and Services
Services applet 20
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Exploring Protocols and Services
Service startup types Automatic Automatic (Delayed Start) Manual Disabled 21
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Understanding Basic Topologies
Internet Extranet Intranet Perimeter Network 22
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Understanding Basic Topologies
Internet Public network 23
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Understanding Basic Topologies
Intranet Organization's internal network 24
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Understanding Basic Topologies
Perimeter Network (DMZ) Between Internet and intranet 25
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Understanding Basic Topologies
Extranet For trusted entities 26
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Chapter 2 Summary Comparing unicast, broadcast, and multicast traffic
Understanding network hardware Exploring protocols and services Understanding basic topologies 27
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