Network Flashcards

1
Q

What type of Routing protocol predominantly is OSPF?

A

Link State

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2
Q

When does OSPF exhibit distance vector routing attributes?

A

Between Areas

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3
Q

What does OSPF stand for?

A

Open Shortest Path First

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4
Q

What Algorithm does OSPF use for path calculation?

A

Dijkstra Algorithm

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5
Q

Is OSPF an EGP or IGP protocol?

A

IGP

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6
Q

Define DR

A

Designated Router -

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7
Q

Define ABR

A

Area Border Router -

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8
Q

Define ASBR

A

Autonomous System Border Router -

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9
Q

Define NSSA

A

Not-So-Stubby-Area -

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10
Q

How do OSPF discovery neighbor rotuers?

A

Hello messages with link state information

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11
Q

Default hello interval?

A

10 Seconds

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12
Q

How often does OSPF routers flood routes and why?

A

30 mins and because all LSAs have a MaxAge where they will be removed

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13
Q

What are the differences between v2 and v3?

A
  1. v3 supports IPv6
  2. v3 uses prefix and prefix lengths
  3. v3 Link Local IPv6 for discovery
  4. v3 IPv6 RFC6506 or IPsec RFC4552 for authentication – not supported by NX-OS
  5. New LSA definitions
  6. BFD is v2 only
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14
Q

Default Dead_Interval

A

4x Hello timers

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15
Q

What happens if Dead_interval is reached?

A

Router is removed from neighbor table

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