Network Layer Flashcards

1
Q

How does routing work?

A

Each router has a forwarding table (maps destination address to outgoing interfaces)
Upon receiving the packet:
- inspects destination IP address in header
- determines outgoing interface
- forward the packet out that interface
(next router in path repeats the process)

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2
Q

What does routing algorithm do?

A

Decides which output line and incoming packet should be transmitted

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3
Q

What are some examples of routing algorithms?

A

Non adaptive: static decision making process

Adaptive: dynamic decision making process

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4
Q

What is hierarchical routing?

A

As networks grow in size, routing tables expand - impacts on performance and memory requirements.
Dividing routers into regions allows efficiencies: each router knows

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5
Q

Routing tables are based around triple

A

IP address
Subnet mask
Outgoing line (physical or virtual)

(longest mask always used when choosing route)

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