Chapter Review

Frame relay is a circuit-switching technology where a dedicated line is allocated for transmission between two parties. True or False?

Like IP packets, ATM allows individual cells to traverse different routes through the ATM network. True or False?

A Fibre Channel Port WWN must always be unique. True or False?

By connecting a Fibre Channel private loop to a FC switch-port operating as an FL_Port, the private loop is transformed into a public loop. True or False?

When a switch supporting IEEE 802.1Q tagging receives a broadcast or multicast frame from a port, it forwards the frame to all other ports on the switch. True or False?

False. Frame Relay is a packet-switching technology.

False. When two ATM devices are communicating, ATM creates a fixed channel over which cells are transmitted. This make it easier to track and bill usage over an ATM network.

True. A Port WWN distinguishes individual FC ports from all other ports within the same node/ SAN .

True.

False. IEEE 802.1Q specifies the architecture for VLAN tagging. As such, a VLAN -aware switch will forward a broadcast or multicast frame to only those ports that belong to the same VLAN as the frame.

You require a data replication solution that will replicate data from one disk array in your main data center to a second disk array in a remote data center. This is a crucial part of your High Availability Disaster Recovery solution. The distances involved require you to implement a WAN . You are looking at ATM as a possible WAN solution. Which of the four main types of ATM service would you select and why?

You have implemented a SAN solution over an OC-3c/ STM -1 ATM link. Your business is utilizing more and more data as the days progress. You forecasted that the data usage over the ATM link will be approximately 85GB per hour . You are concerned about data getting to your destination SAN devices in a timely fashion. In particular, you are looking to improve the WAN link by upgrading the ATM link to an OC-12c/ STM -4 backbone to reduce the propagation delays in the WAN . Are your calculations correct, and will the solution meet your stated objectives?

What is the difference between data consistency and data currency in the context of data replication? Which one is more important to an individual application that needs to be able to access online customer data records regardless of which of the paired disks it uses?

What is the difference between hard and soft zoning in a Fibre Channel SAN ? Which type of zoning would you use if you were experiencing lots of HBA failures in your connected devices?

Devices in a VPN use encryption to secure the communication channel they use. Do they use symmetric or asymmetric cryptography? Explain your answer.