7.1 - 7.2 - Switched and Routed Backbones Flashcards
____________________ are probably the most common type of backbone network (BN) used in distribution layer
Switched backbones
Switched BNs use a ________ topology
star
There is a switch serving each LAN (____________) that is connected to the backbone switch at the bottom of the figure (________________)
access layer…distribution layer
Most organizations now use switched backbones in which all network devices for one part of the building are physically located in the same room, often in a _______ of equipment
rack
The room containing the rack of equipment is sometimes called the ____________________ (MDF) or the ____________________ (CDF)
main distribution facility….central distribution facility
The devices in the rack are connected among themselves using very short cables called __________ cables
patch
With _______________ equipment, it becomes simple to move computers from one LAN to another
rack-mounted
Sometimes a __________ switch is used instead of a rack
chassis
A chassis switch enables users to plug __________ directly into the switch
modules
Each module is a type of __________ device
network
The key advantage of chassis switches is their _____________
flexibility
________________ move packets along the backbone on the basis of their network layer address (IP address)
Routed backbones
Routed backbones are sometimes called __________ backbones or __________ backbones
subnetted…hierarchical
Primary advantage of the routed backbone is that it clearly __________ each part of the network connected to the backbone
segments
Each segment (usually a set of ______ or switched backbone) has its own subnet addresses that can be managed by a different network manager
LANs
One disadvantage of routed backbones is that the routers in the network impose ________ delays
time
A second disadvantage is that routers are more _____________ and require more management than switches
expensive
