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AU '24 > IP > Flashcards

IP Flashcards

1
Q

What service does IP provide?

A

best-effort packet delivery

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2
Q

IP provides best-effort packet delivery between _____, not necessarily _____.

A

two hosts; sharing a common LAN or subnet

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3
Q

How does IP provide best-effort packet delivery?

A

global addressing and packet forwarding

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4
Q

Global addressing is achieved via _____.

A

IP addresses

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5
Q

Packet forwarding is acheieved via _____.

A

routers and routing tables

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6
Q

What three things does IP specify?

A

packet format, addresses, packet routing

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7
Q

What are the two components of IP packet format?

A

header and payload

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8
Q

What are the components of the IP header?

A

source IP address, destination IP address, HopLimit, payload length

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9
Q

What is the payload in an IP packet?

A

the actual data

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10
Q

This set does not include…

A

Slides 11, 12

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11
Q

What is a static IP address?

A

fixed (computer always has same IP address that can’t be hidden and is easily mapped)

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12
Q

What is a dynamic IP address?

A

changes each time computer connects to a network (ISP assigns address from its pool)

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13
Q

Routers talk to each other in what ways?

A

advertising routes and querying for route availability

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14
Q

Routing dangers include…

A

long routes, circular routes, hijacking routes, and route flapping

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15
Q

hijacking routes

A

advertising a route and not delivering

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16
Q

route flapping

A

frequent updating to routing table

17
Q

HopLimit

A

how many hops a packet can make before it expires

18
Q

Why isn’t delivery guaranteed?

A

intermediate host not responding and bad routing

19
Q

Why would intermediate host not respond?

A

temporary malfunction or full queues (congestion

20
Q

bad routing

A

HopLimit reached because route was too long/circular

21
Q

What doesn’t IP do?

A

guarantee delivery, guarantee order or speed of delivery, maintain conversational context, specify a process that should handle the packet at destination

22
Q
A

AU '24 (7 decks)

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