Day 7 - WAN Flashcards
What are the 4 basic WAN topology options?
Point-to-Point
Hub-and-Spoke
Full mesh
Dual homed
Solve for the definition of WAN topology:
Typically uses a dedicated leased line connection, such as a T1 or E1
Point-to-Point
Solve for the definition of WAN topology:
Offers a single homed, point-to-multipoint topology in which a single interface on the hub router can be shared with multiple spoke routers through the use of virtual routers
Hub-and-Spoke
Solve for the definition of WAN topology:
Gives each router a connection to every other router. Requires a large number of virtual interfaces
Full mesh
Solve for the definition of WAN topology:
Provides redundancy for a single-homed hub-and-spoke topology by providing a second hub to connect to spoke routers
Dual-homed
Solve for the WAN topology based on the picture
Dual-homed
Solve for the WAN topology based on the picture
Full mesh
Solve for the WAN topology based on the picture
Hub-and-Spoke
Solve for the WAN topology based on the picture
Point-to-Point
What are the top level main connection options for a WAN?
Private
Public
For a private WAN link, what are the two connection category options?
Dedicated
Switched
For a public WAN link, what is the connection category option?
Internet
What is the connection option for a dedicated WAN link?
Leased Line
What are the two connection options for a Private Switched WAN link?
Circuit-Switched
Packet-Switched
What are the connection options for a Circuit-Switched Private connection?
PSTN (Analog)
ISDN
What are the connection options for a Packet-Switched Private connection?
Metro Ethernet
Frame Relay
x.25
ATM
What are the connection options for a public internet broadband or VPN connection?
DSL
Cable
Wireless
What is the standard connection for a leased line in the US?
T3
What leased line type is 1.544Mbps in speed?
T1
What leased line type is 44.736 Mbps in speed?
T3
What leased line type is 155.54 Mbps in speed?
OC-3
What are the two main types of Circuit-Switched connections?
Analog (PSTN)
ISDN
What two types of ISDN interfaces exist?
Basic rate interface (BRI)
Primary rate interface (PRI)
What are the 4 most common packet switching technologies used today?
Metro Ethernet
Frame Relay
x.25
ATM
Solve for the definition of a packet-switched technology:
This technology uses IP aware ethernet switches in the service provider’s network cloud to offer enterprises converged voice, data, and video services at ethernet speeds
Metro Ethernet
Solve for the definition of a packet-switched technology:
Can carry any payload including IPv4 and IPv6, ethernet, ATM, DSL and frame relay traffic. Used labels inside the service providers network to identify paths between distant routers instead of between endpoints. This technology actually routes IPv4 and IPv6 packets, but everything else is switched
MPLS (Multiprotocol label switching)
What does DSL stand for?
Digital subscriber line
What are 4 wireless technologies that allows users to connect to the internet from almost any location?
WiMAX
Municipal Wifi
Satellite Internet
Cellular
Solve for the description of the WAN link connection type:
Point-to-point connection between two LANs
Leased Line
Solve for the description of the WAN link connection type:
Dedicated circuit path created between two endpoints. Most notably, dial up
Circuit switching
Solve for the description of the WAN link connection type:
Devices transporting packets via a shared single point-to-point or point-to-multipoint link across a carrier internetwork
Packet switching
Solve for the description of the WAN link connection type:
Connectionless packet switching using the internet as the WAN infrastructure
Internet
What is the standard used in North America for service provider optical fiber networks?
SONET
What does PPPoE stand for and what deployments is it typically used for?
Point to Point Protocol over Ethernet normally used in DSL deployments
What does DWDM stand for and what does it do?
Dense Wavelength Division Multiplexing
Combines multiple optical signals into one signal transmitted over a single fiber strand
____________ allows more capacity to be added to existing infrastructure without expensive upgrades and allows more capacity to be added to existing infrastructure
DWDM (Dense Wavelength Division Multiplexing)
What does FTTx stand for?
Fiber to the X:
Home
Premises
Building
Neighborhood
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
Hub and Spoke
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
Redundant Hub and Spoke
Identify the topology based on the scenario:
All sites have a direct path to every other site resulting in optimal traffic flow
Full Mesh
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
Partial Mesh
Identify this internet redundancy option:
Single service provider router to a customer router
Single Homed
Identify this internet redundancy option:
Two service provider routers to two customer routers
Dual Homed
Identify this internet redundancy option:
Two separate service providers and their routers going to the same customer’s routers
Multi-homed
Identify this internet redundancy option:
Full mesh of two separate service providers going to two customer routers
Dual Multi-homed
