Chapter 8 CIS 3230

2. Q: How does a layer-2 switch differ from a VLAN?

A: A VLAN is a combination of layer-2 switches and routers. They are used in large networks that have special requirements.

1. Q: How does a layer-2 switch differ from a router?

A: A layer-2 switch operates at the data link layer. Routers operate at the network layer.

17. Q: How can you improve the performance of a BN?

A: BN performance can be improved by choosing the best network layer protocols, upgrading to faster circuits, adding additional circuits on busy backbones, and by moving servers closer to end users.

10. Q: What are the key advantages and disadvantages of routed and switched backbones?

A: Routed backbones segment each part of a network connected to the backbone, but this method takes more time than switching. Switches are more common and allow single placement of equipment.

7. Q: Explain how routed backbones work.

A: Routed backbones work by moving packets along the backbone. This is determined by the network layer address. The most common form uses a bus topology.

14. Q: Explain how multiswitch VLANs work.

A: Sever switches are used to build the VLANs. This allows the subnet to span buildings.

16. Q: What are the advantages and disadvantages of VLANs?

A: VLANs allow computers in different locations to be in the same subnet while managing the flow of traffic on the LAN and backbone. Disadvantage is very pricey as well as difficult to manage.

6. Q: Under what circumstances would you use a VLAN backbone?

A: You would want to use a VLAN backbone for servers or large-scale organizations.

19. Q: What are the preferred architectures used in each part of the backbone?

For Access layer, switched backbones. For distribution layer, VLAN. For core layer, routed backbones.