Look through the seventh part of text 2 once more and mark the statements as true (T) or false (F).
Date: 2015-10-07; view: 527.
Answer the following questions using the information from the seventh part of text 2.
1. What do we use when we use the Web or send an e-mail message? 2. What translates the human-readable domain name into the machine-readable IP address? 3. How are the top-level domain names also called? 4. How do we call the left-most word, like www? What is its function? 5. What four things can the DNS server do when a request comes in? 6. What do the root servers know? 7. What are the keys to making this work? 8. How many requests do DNS servers handle every day?
| 1. | □ | Every time we use a domain name, we use the Internet`s DNS servers to translate the human-readable domain name into the machine-readable IP address. |
| 2. | □ | The list of second-level domain names include .COM, .ORG, .NET, .EDU and .GOV. |
| 3. | □ | It is not essential for every name in the .COM top-level domain to be unique. |
| 4. | □ | DNS servers accept requests to convert domain names into IP addresses. |
| 5. | □ | The DNS server can return an error message if the requested domain name is invalid or doesn`t exist. |
| 6. | □ | A DNS server would start its search for an IP address by contacting one of the minor DNS servers. |
| 7. | □ | There is only one single DNS server at every level, so that if it fails, there is no other to handle the requests. |
| 8. | □ | Caching helps to keep things from bogging down. |
| <== previous lecture | | | next lecture ==> |
| Match the words on the left with their definitions on the right. | | | Could the Internet collapse? |