Look through parts 7, 8 and 9 of the text and mark the statements as true (T) or false (F). If you think a statement is false, change it to make it true.
Date: 2015-10-07; view: 449.
Answer the following questions using the information from parts 7, 8 and 9 of the text.
1. What kind of network is called a mixed network? 2. What layer of the OSI Reference Model do switches usually work at? 3. What is the difference in the algorithms between switches and routers? 4. When a new computer or other device comes on to the network, what does it do to announce its presence? 5. What example does the author give to describe the work of a router? 6. What technology do LAN switches rely on? 7. What does an Ethernet frame contain in an Ethernet based LAN? 8. What three methods do packet-based switches use for routing traffic? 9. What is the difference between cut-through and store-and-forward methods of routing traffic? 10. What`s the main idea of fragment-free methods?
| 1. | □ | Most networks are not fully switched because it is rather expensive to replace all of the hubs with switches. |
| 2. | □ | Switches usually work at Layer 3 of the OSI Reference Model. |
| 3. | □ | On any network the concept of a broadcast packet is of no importance to the operability of a network. |
| 4. | □ | Whenever a device needs to send out information but doesn`t know who it should send it to, it sends out a broadcast. |
| 5. | □ | A switch will never pass along any broadcast packets it receives to all the other segments in the broadcast domain. |
| 6. | □ | LAN switches rely on packet-switching. |
| 7. | □ | Incoming packets are saved to the switch`s look-up table. |
| 8. | □ | Cut-through switches save the entire packet to the buffer and check it for CRC errors or other problems before sending. |
| 9. | □ | Many switches combine the two methods, using cut-through until a certain error level is reached and then changing over to store-and-forward. |
| 10. | □ | A switch using a fragment-free method stores the first 6 bytes of the packet before sending it on. |
| <== previous lecture | | | next lecture ==> |
| Match the words on the left with their definitions on the right. | | | The OSI Reference Model |