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CS 101 Attendance

CS 101 Attendance. 3 /6/2013. Asychronous communication. is a bad connection means the recipient and sender to NOT have to be online at the same time is how email works is how an Instant Messager works 2 and 3. Are there more servers or clients on the Net?. client machines

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CS 101 Attendance

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  1. CS 101 Attendance 3/6/2013

  2. Asychronous communication • is a bad connection • means the recipient and sender to NOT have to be online at the same time • is how email works • is how an Instant Messager works • 2 and 3

  3. Are there more servers or clients on the Net? • client machines • server machines • impossible to tell • depends on which domain you are considering

  4. Which one is a valid IPv4 number? • 74.125.73.99 • 500.234.91.33 • 150-234-91-11 • 57.98.132

  5. .com, .net, .edu – these are • Low-level domain names • Root-level domain names • Top level domain names • Browser names

  6. Connections to the Internet • Can be done with a regular phone line • Can be done with a cable modem • Can be done with a satellite modem • Usually go through an ISP • All of the above

  7. Choosing an ISP involves considering • Their cost • Their choice of connections • Their space allowances • Their support • All of the above

  8. .ca, .de, .ie are • Country codes • Top level domains • Low-level domains • 1 and 2

  9. ICANN • Controls content of all web pages on the Net • Controls top-level domains • Manages the registrars for the DNS • Approves new IP standards • All choices but 1

  10. Ethernet is • The same as the DNS system • The same as IP • Used on LANs • Uses broadcast techniques • 3 and 4

  11. Domain names go from • More specific to less as you read left to right • Closer to the user to farther away • Shorter to longer names from left to right • Larger IP numbers to smaller ones

  12. Cybersquatting • Doesn’t happen these days, it used to • Involves someone registering a domain name • Involves coercion / blackmail • 2 and 3

  13. A protocol • Prevents communication • Governs how a conversation happens • Has been superseded by Ethernet • Will cost more but improves bandwidth • Is only used by computers

  14. In a domain name like rose.cs.uky.edu • Rose is the most general part of the name • Edu means that it is a temporary address • Cs is a subdomain of uky • None of the answers

  15. ICANN is • The Internet political committee • The corporation which makes rules about domain names • The sole registrar of the Internet domain name system • A branch of the US government

  16. IP designed around packets because • Easier to get small amounts of data through a line with bad connection • Cheaper to use low-quality lines • Packets can be routed to take advantage of changing traffic patterns • All of the answers

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