TDC 363 Spring 2008 Final Exam Study Guide and Pratice Exam John Kristoff Exam Format The final exam will consist of multiple choice, fill in the blank and short essay questions. The exam will take you about 1 to 2 hours to complete, but you have as much time as you need. If you are having an unreasonably difficult time with the exam, chances are others are as well. Do the questions you know best first and go back to the hard ones later. There is a grading curve for the final grade to correct any problems in the exam or my instruction that led up to the exam. You MAY bring a single 8.5" x 11" sheet of paper with crib notes and use that for reference on the exam. Whatever you can write or print on a single sheet, both sides OK, you can use. The exam is closed book, closed notes other than that one sheet, no calculators, computers, phones, or any devices of the sort. Only basic math skills that can be solved with pencil/pen and paper are required. You should have plenty of paper to work with, but if you need more blank sheets, ask. A final word of caution, DO NOT CHEAT. Topics Covered: Cumulative from 1st week of the quarter. The midterm study guide, midterm exam and everything from the first half of the class will make a good reference. All assigned reading, lecture topics and lab exercises is fair game for the exam. Be sure to study your book and review the lectures. Make sure you have gone through the lab exercises and undstand them. Sample Exam Match the best answer on the right with the term on the left. __i__ Netflow a. Windows command shows interface/IP configuration __h__ shell b. command needed to make changes to Cisco device __g__ 127.0.0.1 c. Windows or UNIX command shows network connections __e__ ifconfig d. MAC (layer 2) / IP address mapping protocol __a__ ipconfig e. UNIX command shows interface/IP configuration __c__ netstat f. communication in both directions at the same time __f__ full-duplex g. commonly referred to as the loopback interface __d__ ARP h. UNIX command line interpreter __b__ conf t i. technology for summarizing network traffic data The Cisco command we used to display the active device configuration was (select the best answer): _x_ sh run / show running / show running-configuration ___ display settings ___ g conf / get config / get configuration ___ run show Examine the following input from a "show interfaces" command on a Cisco device and answer the following questions: FastEthernet0/2 is down, line protocol is down (notconnect) Hardware is Fast Ethernet, address is 000d.bd36.0302 (bia 000d.bd36.0302) MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Auto-duplex, Auto-speed input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 13:53:20 Last input 9w6d, output 3d00h, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute ouxtput rate 0 bits/sec, 0 packets/sec 56033665 packets input, 1395351422 bytes, 0 no buffer Received 3795563 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 2695316 multicast, 0 pause input 0 input packets with dribble condition detected 113292333 packets output, 767659551 bytes, 0 underruns 0 output errors, 0 collisions, 5 interface resets What is the Cisco name of the interface? FastEthernet0/2 Is anything connected to this interface? No, it is "down" and in the "(notconnect)" state. What is the interface's MAC address? 000d.bd36.0303 Discuss some of the issues involving in building a network such as DePaul's, where you have multiple LANs per building, have to connect buildings together, install wireless LANs and so forth. One of the first considerations for LANs is physical wiring. Where do you expect to need wired ports? One per room, more? What about common workspaces such as labs? What type of cable? Probably will use at least category five, but sometimes the best cable is worth it to avoid deficiencies in other areas later. Where will the wiring closets be located. Ensure maximum cable run distances are not exceeding standard specs. Ensure wiring closets are dedicated to LAN equipment (do not share it with the janitor if at all possible). Cables must be tested and certified. Much of the initial investment in a network install comes from cabling installation. No so much the physical cable itself per se, but the labor charges and any physical changes you need to make to install cable in an existing building. Typically you install fiber between floors and buildings, but practically it doesn't make sense to install fiber to end stations in most institutions, because all end hosts only come with copper network adapters and don't need fiber. Plus, fiber termination and equipment is even more expensive. There are different types of network gear, such as stackable switches and chassis systems. Each has some advantages and disadvantages. The stackables tend to be cheaper and simpler, but may lack some power redundancy, upgrade capability and features. You have to decide the physical LAN segment size and IP subnet size for you networks. Too small may waste ports or addresses and too large may result in excessive broadcast storms or heavily loaded networks. [ etc. ] Downloading, building and installing UNIX software from source code is often done using steps like those listed below, true or false: wget http://example.org/software-1.0.tar.gz tar zxvf software-1.0.tar.gz cd software-1.0 ./configure make make install Answer: True Which is not a common UNIX shell command? ___ cd ___ ls ___ mkdir _x_ inetconfig ________________ is a network packet capture utility. (fill in the blank). Answer: Wireshark (or tcpdump or Ethereal) Which is popular OS virtualization software we used in the lab? ___ VMer _x_ VMWare ___ Wine ___ FakeOS Describe in your own terms the core differences between a LAN switch and a LAN repeater. A LAN switch, aka LAN bridge, separates two or more layer 2 networks such as Ethernet segments. It isolates the collision domains between each network and forwards layer 2 frames between segments as needed. The LAN switch makes a forwarding decision based on the destination address, flooding if its unknown, and learning the source address to build its bridge address table. A LAN repeater, also known as a LAN hub, is a simpler device that simple retransmits the physical signal from an incoming port onto all other ports. It simply regenerates the LAN signals onto all ports. It doesn't examine any protocol details or separate collision domains nor makes any forwarding decision nor learns where sources are. [ in progress ] $Header: final-guide.txt,v 1.1 2008/06/09 15:26:38 jkristof Exp $