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CCNA 200-301 > WANs > Flashcards

WANs Flashcards

1
Q

What is a network that connects computers and other devices in a relatively small area, typically a single building or a group of buildings called?

A

LAN (Local Area Network)

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2
Q

What is a geographically distributed network that connects multiple Local Area Networks together called?

A

WAN (Wide Area Network)

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3
Q

What is a network that connects computers and other devices in a geographic area larger than a LAN but smaller than a WAN called?

A

MAN (Metropolitan Area Network)

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4
Q

This provides a virtual tunnel between private networks across a share public network such as the internet

A

VPN

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5
Q

True or False: Traffic travelling over VPN tunnels is unencrypted

A

False. It’s encrypted

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6
Q

Site to Site VPNs typically use what type of encryption?

A

IPSec

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7
Q

Connections between a router or firewall in the office and VPN software installed on an individual user’s device is called what?

A

Remote Access VPN

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8
Q

What type of encryption do Remote Access VPNs typically use?

A

SSL but sometimes they use IPSec

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9
Q

This is an open standard configuration for a site to site VPN and it does not support multicast

A

IPSec Tunnel

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10
Q

This type of VPN configuration added support for multicast but doesn’t support encryption on it’s own so it has to be paired with IPSec Tunnel

A

GRE (Generic Routing Encapsulation) over IPSec Tunnel

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11
Q

This type of VPN configuration is used between Cisco devices, often site to site VPNs and is Cisco proprietary and supports multicast

A

IPSec VTI (Virtual Tunnel Interface)

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12
Q

This type of VPN configuration is a simple and scalable hub and spoke style that enables direct full mesh connectivity between all offices

A

DMVPN (Dynamic Multipoint VPN)

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13
Q

Very similar to DMVPN. Newer technology and it’s Cisco proprietary

A

FlexVPN

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14
Q

This configuration has centralized policy for VPN over non-public infrastructure (not the internet)

A

GETVPN (Group Encrypted Transport VPN)

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15
Q

This is a dedicated physical connection between two locations with fixed, reserved bandwidth which is not shared by anyone else.

A

Leased Line

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16
Q

This type of WAN connection uses a serial connection requiring the correct physical interface card on the router

A

Leased Line

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17
Q

This type of WAN connection share the same characteristics as a leased line, typically more expensive and low bandwidth. May be the only option is hard to reach areas

A

Satellite

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18
Q

This type of WAN connection has T1, T2, T3 and T4

A

Leased Line

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19
Q

What does MPLS stand for?

A

Multi Protocol Label Switching

20
Q

This type of WAN connection is where traffic from multiple customers can travel over the provider’s shared network, so this is considered a VPN service

A

MPLS

21
Q

MPLS VPNs provide this type of topology by default

A

Full Mesh

22
Q

Leased Lines use what kind of link?

A

Point to Point

23
Q

In regards to MPLS what do these stand for?

CE
PE
P

A

CE - Customer Edge Device
PE - Provider Edge Device
P - Provider Core Device

24
Q

True or False: Customer Edge devices run MPLS

A

False. Only the Provider Edge and Provider Core devices run MPLS

25
Q

With MPLS, what devices do static routes and routing protocols run on?

A

Customer Edge device and the Provider Edge Device

26
Q

With MPLS, are the customer’s devices oblivious to the providers core devices?

A

Yes. They only see the Providers edge device but not their core device

27
Q

What is different about Layer 3 MPLS vs. Layer 2 MPLS?

A

The CE devices do not peer with the PE devices. The entire provider network is transparent to the customer

28
Q

What does VPLS stand for and how many sites can it support and what layer does it run at?

A
  • Virtual Private LAN Service
  • 2 or more sites
  • Layer 2
29
Q

What does VPWS stand for and how many sites can it support and what layer does it reside at?

A

Virtual PsuedoWire Service
2 sites point to point
Layer 2

30
Q

What does PPPoE stand for and what deployments is it typically used for?

A

Point to Point Protocol over Ethernet normally used in DSL deployments

31
Q

What does DSL stand for?

A

Digital Subscriber Line

32
Q

What is the standard used in North America for service provider optical fiber networks?

A

SONET (Synchronous Optical Network)

33
Q

What is the standard used in the rest of the world for service provider optical fiber networks?

A

SDH

34
Q

What does DWDM stand for and what does it do?

A

Dense Wavelength Division Multiplexing

Combines multiple optical signals into one signal transmitted over a single fiber strand

35
Q

____________ allows more capacity to be added to existing infrastructure without expensive upgrades and allows more capacity to be added to existing infrastructure

A

DWDM (Dense Wavelength Division Multiplexing)

36
Q

What are three backup solutions for corporate offices that might be typically aimed at home internet users?

A

DSL
Cable
Wireless (4G, LTE, 5G)

37
Q

This type of WAN connection is more suitable for longer distance rathe than using copper wire

A

Optical Fiber

38
Q

What does FTTx stand for?

A

Fiber to the X:

Home
Premises
Building
Neighborhood

39
Q

Identify the topology based on the scenario:

Simplistic, centralized security policy with one router being the hub that all traffic flows through for other sites

A

Hub and Spoke

40
Q

What are the disadvantages of a hub and spoke?

A

Single point of failure and suboptimal traffic flow

41
Q

Identify the topology based on the scenario:

Removes the single point of failure by adding another hub to the topology, yet all traffic from other sites still flow these centralized hubs

A

Redundant Hub and Spoke

42
Q

Identify the topology based on the scenario:

All sites have a direct path to every other site resulting in optimal traffic flow

A

Full Mesh

43
Q

Identify the topology based on the scenario:

Similar to Hub and Spoke but one spoke site has connectivity to another through a leased line rather than having to go to the hub to get where it needs to go

A

Partial Mesh

44
Q

Identify this internet redundancy option:

Single service provider router to a customer router

A

Single Homed

45
Q

Identify this internet redundancy option:

Two service provider routers to two customer routers

A

Dual Homed

46
Q

Identify this internet redundancy option:

Two separate service providers and their routers going to the same customer’s routers

A

Multi-homed

47
Q

Identify this internet redundancy option:

Full mesh of two separate service providers going to two customer routers

A

Dual Multi-homed

CCNA 200-301 (25 decks)

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