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Network + > Layer 3 > Flashcards

Layer 3 Flashcards

1
Q

Purpose of Layer 3

A 
Routing
Switching
Route discovery and selection
Connection services
Bandwidth services
Multiplexing
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2
Q

Packet switching

A

Routing

Data is divided into packets and forwarded

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3
Q

Circuit switching

A

Dedicated communication link is established between 2 devices (phone call)

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4
Q

Message switching

A

Data is divided into messages (similar to packet switching)

Messages may be stored then forwarded (email)

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5
Q

ICMP

A

Internet Control Message Protocol
Used to send error messages and operational information about IP destination
Troubleshooting (ping and traceroute)

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6
Q

Examples of Layer 3 devices

A 
Routers
Multilayer switches
IPv4
IPV6
ICMP
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