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Network Security Essentials > MULTI-WAN > Flashcards

MULTI-WAN Flashcards

1
Q

What kind of traffic does Multi-WAN control

A

Outbound traffic

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2
Q

What kind of interfaces does Multi-WAN control?

A

External interfaces

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3
Q

Give 3 benefits of multi-WAN.

A
  1. Redundancy
  2. Bandwidth optimization
  3. Failover
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4
Q

Is Multi-WAN automatically enabled when you configure two or more external interfaces?

A

Yes

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5
Q

What is the GLOBAL ROUTING OPTION if your Firebox has multiple external interfaces?

A

Multi-WAN

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6
Q

Is Multi-WAN enabled for modems by default?

A

No

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7
Q

Does Multi-WAN impact BOVPNs?

A

No

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8
Q

Does Multi-WAN impact inbound traffic?

A

No

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9
Q

Enumerate 4 Multi-WAN methods.

A
  1. Failover
  2. Routing table
  3. Round-robin
  4. Interface overflow
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10
Q

What Multi-WAN method sends all outgoing connections to the primary interface?

A

Failover

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11
Q

Which Multi-WAN method is the default when Multi-WAN is enabled?

A

Failover

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12
Q

Which Multi-WAN method sends outgoing connections through a backup interface only if the primary interface is not available?

A

Failover

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13
Q

Which Multi-WAN method uses ECMP to distribute outgoing connections based on the src/dst IP addresses?

A

Routing table

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14
Q

What does ECMP stand for?

A

Equal Cost Multi-Path Routing

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15
Q

Which Multi-WAN method attempts to equalize the number of connections that go out of each interface?

A

Routing table

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16
Q

Which Multi-WAN method distributes outgoing connections based on the number of connections?

A

Round robin

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17
Q

In round robin method, what happens when the weight is set to 1 for each external interface?

A

Connections sent through each interface are attempted to be equalized

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18
Q

How does a weighted round robin behave like for light traffic loads?

A

Connection-based round robin

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19
Q

How does a weighted round robin behave like for heavier traffic loads?

A

Load-based round robin

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20
Q

Which round robin behavior is depicted when the number of connections through each interface is determined?

A

Connection-based round robin

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21
Q

Which round robin behavior is depicted when the load through each external interface is determined?

A

Load-based round robin

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22
Q

Which Multi-WAN method enables you to set a bandwidth limit to restrict the amount of traffic sent over each WAN interface?

A

Interface overflow

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23
Q

Which Multi-WAN method has the algorithm of sending outgoing connections to external interface in the order you specify?

A

Interface overflow

24
Q

What does the Firebox use for the best path when all interfaces reach their bandwidth limit?

A

Routing table

25
Q

What is disabled when Multi-WAN is enabled?

A

Link Monitor

26
Q

What is disabled by default when Multi-WAN is enabled?

A

Link Monitor

27
Q

What occurs when an interface that was previously active becomes unable to send traffic to external networks?

28
Q

What occurs when an interface that was previously no able to reach external locations becomes active again?

29
Q

What occurs when Wi-Fi stops working and your computer switches to phone’s hotspot to stay connected?

30
Q

What occurs when Wi-Fi gets fixed and starts working again, and computer switches back from the phone’s hotspot to the Wi-Fi connection?

31
Q

What occurs if a Link Monitor ping probe fails?

A

A logical failure occurs

32
Q

What does the Firebox do to the external interface if an external interface goes down?

A

Removes it from all routing decisions

33
Q

What takes precedence over Multi-WAN?

34
Q

Which Multi-WAN method is configured to have only 1 active external interface at any given time?

35
Q

In what order does Failover method happen?

A

Top-down order

36
Q

Which Multi-WAN method is a good option when the backup external interface is metered?

37
Q

What does ECMP do?

A

Choose the shortest path to the destination

38
Q

How does ECMP choose the shortest path to the destination?

A

Look at hop counts

39
Q

What is needed to be configured to get accurate hop count information?

A

Dynamic routing on external interfaces

40
Q

What happens if dynamic routing is not used?

A

All interfaces are weighted equally

41
Q

Is the routing table option available in WatchGuard Cloud interface?

42
Q

Is there an order needed to be configured for Interface overflow method?

43
Q

In Interface overflow method, what happens if threshold on all interfaces are reached?

A

ECMP is used

44
Q

Is the interface overflow option available in WatchGuard Cloud interface?

45
Q

Enumerate 3 options for Failback

A
  1. Gradual
  2. Immediate
  3. No Failback
46
Q

Which failback option has existing connections remain on the failover interface but new connections go thru the primary interface?

47
Q

Which failback option is useful for voice or video traffic?

48
Q

Which failback option has connections naturally move over when they come back online?

49
Q

Is it recommended to use Gradual option for metered connections?

50
Q

Which failback option has connections terminated when the primary is available again?

51
Q

Which failback option is disruptive?

52
Q

Which failback option prevents excess charges on metered connections?

53
Q

Which failback option has connections stay on the failover interface even if the primary interface is available?

A

No failback

54
Q

Is BOVPN failover independent of Multi-WAN?

55
Q

In Policy Manager, how to configure Multi-WAN?

A

Network tab > Configuration > Multi-WAN tab

Network Security Essentials (7 decks)

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