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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
What is disabled when Multi-WAN is enabled?
Link Monitor
26
What is disabled by default when Multi-WAN is enabled?
Link Monitor
27
What occurs when an interface that was previously active becomes unable to send traffic to external networks?
Failover
28
What occurs when an interface that was previously no able to reach external locations becomes active again?
Failback
29
What occurs when Wi-Fi stops working and your computer switches to phone's hotspot to stay connected?
Failover
30
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?
Failback
31
What occurs if a Link Monitor ping probe fails?
A logical failure occurs
32
What does the Firebox do to the external interface if an external interface goes down?
Removes it from all routing decisions
33
What takes precedence over Multi-WAN?
SD-WAN
34
Which Multi-WAN method is configured to have only 1 active external interface at any given time?
Failover
35
In what order does Failover method happen?
Top-down order
36
Which Multi-WAN method is a good option when the backup external interface is metered?
Failover
37
What does ECMP do?
Choose the shortest path to the destination
38
How does ECMP choose the shortest path to the destination?
Look at hop counts
39
What is needed to be configured to get accurate hop count information?
Dynamic routing on external interfaces
40
What happens if dynamic routing is not used?
All interfaces are weighted equally
41
Is the routing table option available in WatchGuard Cloud interface?
No
42
Is there an order needed to be configured for Interface overflow method?
Yes
43
In Interface overflow method, what happens if threshold on all interfaces are reached?
ECMP is used
44
Is the interface overflow option available in WatchGuard Cloud interface?
No
45
Enumerate 3 options for Failback
1. Gradual 2. Immediate 3. No Failback
46
Which failback option has existing connections remain on the failover interface but new connections go thru the primary interface?
Gradual
47
Which failback option is useful for voice or video traffic?
Gradual
48
Which failback option has connections naturally move over when they come back online?
Gradual
49
Is it recommended to use Gradual option for metered connections?
No
50
Which failback option has connections terminated when the primary is available again?
Immediate
51
Which failback option is disruptive?
Immediate
52
Which failback option prevents excess charges on metered connections?
Immediate
53
Which failback option has connections stay on the failover interface even if the primary interface is available?
No failback
54
Is BOVPN failover independent of Multi-WAN?
Yes
55
In Policy Manager, how to configure Multi-WAN?
Network tab > Configuration > Multi-WAN tab

Network Security Essentials (7 decks)

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