Networking & Telecommunications HW2 - 30 points due in 2 weeks (oct 12) Hand in the following questions and answers, neatly typed (EACH question should be listed, followed by its answer). Type it in Word or any other word processing software. Answers MUST be BOLDFACED! Make sure to read and UNDERSTAND all of the below, dont just look up the answers and hand in. Some of the following will be on your tests. (when asked to read a section, read all of it) I. v.90 modems Most analog modems today use the v.90 standard. Check out the web site: http://www.fujitsu-siemens.co.uk/rl/servicesupport/techsupport/Boards/Modems/modemdiags/General-Info/Modem-Standards.htm And answer the following questions. 1. What is the speed of a V90 modem? ____________________ 2. What newer standards is there (after v.90)? _______________ 3. Does that newer standard have a faster speed? (yes or no) _________________________ The data rates on a v90 modem are asymetrical, you have different rates for uploading and downloading. (why are they asymetrical? People download more then upload.) 4. What are the uploading (upstream) speeds? _____________________ 5. What are the downloading (downstream) speeds? __________________ 6. Good connections with v90 modems are most likely to occur within ____________ miles of the local CO (Central Office/Exchange). 7. How does a crow fly? __________________ And does your phone connection from your house to the CO follow the same path as a crow? ___________________ (yes/no) (this info is true for not only normal telephone lines, but DSL and such). II. TCP/IP TCP/IP is a very popular protocol to exchange information on a lan or a wan. The Internet is also heavily based on tcp/ip. Take a look at the following intro document to tcp/ip from Cisco..I mentioned this in a previous email: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ip.htm After you read the above, answer the following questions: 1. The TCP/IP protocol suite is made up of many different protocols, the two main ones are ______________ and _______________. 2. Name the different fields in an IP packet (datagram): What is the TTL field used for and what does the initials mean? What happens when TTL becomes 0? 3. IP supports 5 different address classes, the main ones for commercial use are ________________, ____________________ and __________________. IP networks can be divided into smaller networks called ____________. 4. What is UDP? What does it stand for? It is used as a replacement for what protocol? 5. What is TCP/IP ? What do the initials stand for? What does TCP do? What does IP do? 6. What are some of the fields in a TCP packet? 7. What does an internet address (IP address) look like? Give an example. How many bits is the number? 8. How many bits is an Ethernet address? Give an example of what an ethernet address looks like. 9. Name some tcp/ip higher layer protocols/applications (from table 30-5). III. Technical Terms. Check out: http://www.webopedia.com/ which is a web site for technical computer terms. Look up: broadband topology diskless workstation ip address ethernet tcp ip token passing CSMA/CD 5-4-3 rule Some of the above you can just "Search by keyword" others you will have to "Search by choose a category" and then pick 'networks'. DONT write down the definitions of the above for hw, just read the above definitions...then answer the below based on that info. 1. _______________ is an example of a broadband transmission. Most lans use ___________________ transmissions/communications. 2. A ______________ topology combines a linear bus and star networks. 3. The IEEE standard for Ethernet is _____________ and runs at a speed of _____________. Ethernet uses what channel access method: ________________. 4. A diskless workstation is a type of client system that simplifies ______________ and ______________ because all files are stored in one place (on the file server). 5. DOes the 5-4-3 rule apply to switches (switched ethernet network)? ______________ (yes or no) 6. Also, look up "v.92" v.90 top speed is _____________________, which is the top transmission speed for an analog modem. But there is also a new standard called v.92. Does v.92 have a faster transmissions speed then v.90? ____________ What is the difference between v.92 and v.90 ? IV. Gigabit Ethernet Visit: http://www.cisco.com/en/US/tech/tk389/tk214/tech_brief09186a0080091a8a.html a. What channel access method does gigabit ethernet use ? _________________ b. the Gigabit Ethernet Standard is IEEE ________________. c. Initially, Gigabit Ethernet is set to operate over fiber optic cable, but will also be able to use _________________. d. What is the speed of gigabit ethernet? _________________ e. In a lan, gigabit ethernet is more useful for use as a network _________ or with _______________ connectivity (rather then connecting clients). V. Next visit the following www site: http://www.ethermanage.com/ethernet a. The original diagram for Ethernet, (the hand sketch), used what form of Ethernet (thick, thin, fiber, TP, etc...)? ____________________________ (look closely at the diagram and what we learned in class) and what type of topology __________________ (bus, star, ring)? b. Who draw this diagram and on what date? ____________________________ Check out "Why is it called Ethernet" on the above page. c. In what year did Metcalfe and his staff develop the first experimental ethernet system ? _____________ d. Where did they work at ? _________________ e. What personal computer did they use? ___________________ f. Ethernet was derived from the word ____________, which was a mythical substance that people once believed filled space and propagated electro magnetic waves.