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CCNA > 25 - OSPF Part 2 > Flashcards

25 - OSPF Part 2 Flashcards

1
Q

Configure all interfaces to be OSPF passive interfaces by default:
R1(config-router)# […]

A

passive-interface default

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2
Q

Configure the bandwidth of an interface:
R1(config-if)# […]

A

bandwidth <kilobits-per-second></kilobits-per-second>

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3
Q

Configure the OSPF cost of an interface:
R1(config-if)# […]

A

ip ospf cost <cost></cost>

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4
Q

Configure the OSPF reference bandwidth:
R1(config-router)# […]

A

auto-cost reference-bandwidth <megabits-per-second></megabits-per-second>

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5
Q

Does the bandwidth command change the speed at which an interface operates?

A

No
(the speed command does)

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6
Q

Enable OSPF directly on an interface:
R1(config-if)# […]

A

ip ospf <process-id> area <area-id></area-id></process-id>

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7
Q

If a router receives an OSPF Hello packet but its own router ID is not in the Hello packet, the neighbor state is […].

A

Init

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8
Q

If no Hello messages have been received, the OSPF neighbor state is […].

A

Down

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9
Q

In the OSPF […] state, routers exchange DBDs which contain a list of LSAs in their LSDB.

A

Exchange

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10
Q

In the OSPF […] state, routers send LSR messages to request LSAs from their neighbor.

A

Loading

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11
Q

In the OSPF […] state, the routers have a full OSPF adjacency and identical LSDBs.

A

Full

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12
Q

In the OSPF Exstart state, which router becomes the Master?

A

The router with the higher router ID.

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13
Q

In the OSPF Exstart state, which router becomes the Slave?

A

The router with the lower router ID

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14
Q

In which OSPF neighbor state are a Master and Slave determined?

A

Exstart

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15
Q

OSPF DR/BDRs are elected in the […] neighbor state.

A

2-way

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16
Q

OSPF Hello messages are multicast to […]

A

224.0.0.5

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17
Q

OSPF LSAs are sent in […] messages.

A

LSU

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18
Q

OSPF Message type 1 = […]

A

Hello

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19
Q

OSPF Message type 2 = […]

A

Database Description (DBD)

20
Q

OSPF Message type 3 = […]

A

Link-State Request (LSR)

21
Q

OSPF Message type 4 = […]

A

Link-State Update (LSU)

22
Q

OSPF Message type 5 = […]

A

Link-State Acknowledgement (LSAck)

23
Q

OSPF Message type […] = Database Description (DBD)

A

2

24
Q

OSPF Message type […] = Hello

A

1

25
Q

OSPF Message type […] = Link-State Acknowledgement (LSAck)

A

5

26
Q

OSPF Message type […] = Link-State Request (LSR)

A

3

27
Q

OSPF Message type […] = Link-State Update (LSU)

A

4

28
Q

OSPF neighbor states:
1. […]
2. […]
3. […]
4. Exstart
5. Exchange
6. Loading
7. Full

A

Down
Init
2-way

29
Q

OSPF neighbor states:
1. Down
2. […]
3. […]
4. […]
5. Exchange
6. Loading
7. Full

A

Init
2-way
Exstart

30
Q

OSPF neighbor states:
1. Down
2. Init
3. 2-way
4. […]
5. […]
6. […]
7. Full

A

Exstart
Exchange
Loading

31
Q

OSPF neighbor states:
1. Down
2. Init
3. 2-way
4. Exstart
5. […]
6. […]
7. […]

A

Exchange
Loading
Full

32
Q

OSPF neighbor states:
1. Down
2. Init
3. […]
4. […]
5. […]
6. Loading
7. Full

A

2-way
Exstart
Exchange

33
Q

OSPF: What does DBD stand for?

A

Database Description

34
Q

OSPF: What does LSAck stand for?

A

Link State Acknowledgement

35
Q

OSPF: What does LSR stand for?

A

Link State Request

36
Q

OSPF: What does LSU stand for?

A

Link State Update

37
Q

What is the default OSPF Dead timer on an Ethernet connection?

A

40 seconds

38
Q

What is the default OSPF Hello timer on an Ethernet connection?

A

10 seconds

39
Q

What is the default OSPF reference bandwidth?

A

100 mbps

40
Q

What is the formula to calculate OSPF interface cost?

A

Reference bandwidth / interface bandwidth = cost

41
Q

What is the multicast address for all OSPF routers?

A

224.0.0.5

42
Q

What is the OSPF cost of a 10Gig Ethernet interface with the default reference bandwidth?

A

1

43
Q

What is the OSPF cost of a FastEthernet (100 mbps) interface with the default reference bandwidth?

A

1

44
Q

What is the OSPF cost of a Gigabit Ethernet interface with the default reference bandwidth?

A

1

45
Q

What is the OSPF cost of a loopback interface?

A

1

46
Q

What is the OSPF cost of an Ethernet (10 mbps) interface with the default reference bandwidth?

A

10

47
Q

When an OSPF router receives a Hello packet with its own router ID, the OSPF neighbor state is […].

A

2-way

CCNA (24 decks)

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