WAN For Enterprise

Question 1

What is Dynamic Multipoint VPN (DMVPN)?

Answer 1

hub and spoke topology with multiple sites that use DMVPN to configure multiple sites dynamically

Question 2

What is GetVPN and two things does it used to transport data securely over a private WAN?

Answer 2

Tunnel-less VPN uses group member routers that communicate to a key server over a private WAN

Question 3

What is a MPLS VPN?

Answer 3

uses labels in the service provider network to interconnect to set of sites for the transport and routing of network traffic

Question 4

What is a Virtual Private LAN Service (VPLS)?

Answer 4

connect multiple local area networks (LANs) over the Internet into a single bridged domain using a IP/MPLS network

Question 5

What are the two protocols used for Virtual Private LAN Service (VPLS)?

Answer 5

IP/MPLS

Question 6

What type of router would you use to connect customers or subscribers to a VPLS network?

Answer 6

vEdge router

Question 7

What would be the purpose of using a demilitarized zone (DMZ) in a network?

Answer 7

divide and secure a network into two parts from inside the same LAN

Question 8

What is the difference in virtualization between a Layer 2 vs a Layer 3 VPN?

Answer 8

Layer 2 VPN virtualizes the data link layer for remote sites so they operate on the same LAN

Layer 3 VPN virtualizes the network layer in order to route customer networks over a public infrastructure

Question 9

What is the difference in connectivity between a Layer 2 vs Layer 3 VPN?

Answer 9

Layer 2 VPN makes Layer 3 IP connectivity with remote customer sites not the service provider

Layer 3 VPN makes Layer 3 IP connectivity with provider sites edge devices

Question 10

Are service providers involved in the routing of customer subnets using a Layer 2 VPN? True/False

Answer 10

False

Question 11

Are service providers involved in the routing of customer subnets using a Layer 3 VPN? True/False

Answer 11

True

Question 12

What are two types of L2 VPNs?

Answer 12

VPLS & Tunneling

Question 13

What are three types of L3 VPNs?

Answer 13

MPLS VPN, P2P IPSec

Question 14

What is dark fiber and the benefit of using it?

Answer 14

unused optical fiber separate from a main network that’s controller by the client rather than a network provider

Question 15

What is Dense Wavelength Division Multiplexing (DWDM)?

Answer 15

Fiber-optic transmission technique for processing multiple digital signals for many different wavelengths into a single optical fiber