7.4 - Backbone Design Best Practices

Question 1

For the distribution layer, either rack-mounted or using a chassis switch is the most effective architecture in terms of cost & performance

Answer 1

Switch Backbone

Question 2

For the core layer, the most effective architecture in terms of cost & performance is

Answer 2

routed backbone

Question 3

The _____________ (i.e., the LANs) uses 1000Base-T layer 2 Ethernet switches running on Caat5e or Cat6 twisted-pair cables to provide flexibility for 100Base-T or 1000Base-T

Answer 3

access layer

Question 4

The _____________ uses layer 2 or VLAN switches that uses 100Base-T or more commonly 1000Base-T/F (over fiber or Cat6) to connect the access layer

Answer 4

distribution layer

Question 5

The _____________ uses routers or VLAN Ethernet switches running 10 GbE or 40 GbE over fiber

Answer 5

core layer

Question 6

Performance Checklist:

Answer 6

1. Increase Device Performance
2. Increase Circuit Capacity
3. Reduce Network Demand

Question 7

_____________ routing is faster than dynamic routing, but can impair circuit performance in high-traffic situations

Answer 7

Distance vector

Question 8

_____________ routing is usually used in WANs because there are many possible routes through the network

Answer 8

Link state

Question 9

Most backbone devices are _____________ devices

Answer 9

store-and-read