Combo with Troubleshooting Physical Connectivity and 5 others
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Upon conducting a visual inspection of the server room, you see that a switch displays LED collision lights that are continually lit. You check the LED on the corresponding workstation and see that it is flashing rapidly even though it is not sending or receiving network traffic at that time. What is the cause of the network collision?
answer
Faulty network card.
question
You have been asked to document the wiring in the building. You would like to identify the length of each Cat5 cable to verify that it meets Ethernet standards. You need to identify the length of the cables, but most cables run through walls and ceilings, making them difficult to trace. Which tool should you use?
answer
TDR.
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Users report that the Internet is no longer accessible. You suspect that the line connecting your building to the Internet is not working properly. Which of the following allows the service provider to remotely test the local loop?
answer
Smart jack.
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The phone line to one office is not working. You have identified the location of the phone line in a 66 block in the wiring closet. Which tool would you use to connect to the phone line at the punchdown block to see if you can make or receive calls?
answer
Butt set.
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You want to create a loopback plug using a single RJ-45 connector. How should you connect the wires in the connector?
answer
Connect pin 1 to pin 3 and pin 2 to pin 6.
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You are working with an existing fiber optic installation in your building. You want to know how long each length of cable is that runs through walls. Which tool should you use?
answer
OTDR
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You want to measure the voltage, amps, and ohms of various devices. Which tool should you use?
answer
Multimeter.
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During a network infrastructure upgrade, you have replaced two 10 Mbps hubs with switches and upgraded from Category 3 UTP cable to Category 5e. During the process, you accidentally cut the Cat 5e patch cable that stretches from the network printer to the upgraded switch. What is the impact on the network?
answer
All network nodes, with exception of the printer, will be available.
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You are creating an Ethernet network for your company. The shipping department is located in a different building that is located 150 meters from the main wiring closet. You connect a single Cat 6e cable to connect the wiring closet to the shipping building. Which of the following should you include in your plan?
answer
Repeater.
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Which of the following best describes the condition where a signal sent on one wire is received on another wire within the same connector?
answer
NEXT.
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You have a network connected using a physical bus topology. One of the cables connecting a workstation to the bus breaks. Which of the following best describes what happens to network communications?
answer
No device is able to communicate.
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You're responsible for implementing network cabling in a new network installation. The cabling will be installed in a manufacturing environment where there is a great deal of electromagnetic interface (EMI). Which type of cabling would operate best in this environment?
answer
Shielded twisted pair cable. Fiber-optic cable.
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You are creating an Ethernet network for your company. The shipping department is located in a different building that is located 150 meters from the main wiring closet. You connect a single Cat6e cable to connect the wiring closet to the shipping building. Which of the following are you most likely to experience?
answer
Attenuation.
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You have a cable Internet connection at home. The installer had connected the router near the outside wall of your house with RG-6 cable. You move the cable router a distance of 50 meters using RG-8 cables and special connector adapters. Which condition are you most likely to experience?
answer
Echo.
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You are troubleshooting a client connectivity problem on an Ethernet network. The client system has intermittent connectivity to the network. You discover that the UTP patch cable is run 75 feet from the wall outlet, passes through the ceiling and over several florescent light fixtures before reaching the client system. Which of the following may be a cause of the connectivity problem?
answer
EMI interfaace.
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You manage a network that uses 1000BaseT Ethernet. You find that one device communicates on the network at only 100 Mbps. Which tool should you use to test the drop cable and the connection to the network?
answer
Certifier.
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A user from the Sales department calls to report that he is experiencing problems connecting to the Sales file server. All users in the Sales department connect to the Sales server through a single Ethernet switch. No other users have reported problems connecting to the Sales server. Which of the following troubleshooting actions are you most likely to perform first?
answer
Replace the network card in the user's computer.
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You have a network connected using a physical star topology. One of the drop cables connecting a workstation is removed. Which of the following best describes what happens to network communications?
answer
All devices except the device connected to the drop cable will be able to communicate.
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You have a network using a full physical mesh topology. The link between device A and device B is broken. Which of the following best describes what happens to network communications?
answer
Device A will be able to communicate with all other devices.
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You have decided to implement Gigabit Ethernet on your network. Each switch port is connected to a single device. Following the installation, you find one device connected to a switch that is only running at 100 Mbps. Which of the following are likely causes?
answer
Crosstalk.
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Which of the following tests can be performed by a TDR?
answer
Measure the length of a cable. Identify the location of a fault on a cable.
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You have just connected four new computer systems to an Ethernet switch using spare patch cables. After the installation only three systems are able to access the network. You verify all client network settings and replace the network card in the failed system. The client is still unable to access the network. Which of the following might you suspect as the real cause of the problem?
answer
Failed patch cable.
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You are moving a client to a new location within an Ethernet network. Previous to the move, the client system did not have any difficulty accessing the network. During the relocation, you attach a patch cable from the client system to the wall jack and from the patch panel to the switch. Once connected you do not get a link light on the network card or the switch. You swap out the cable running between the patch panel and the switch with a known working one but you can still not connect. Which of the following might you suspect as the problem?
answer
Failed patch cable between the client system and the wall jack.
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You are troubleshooting a connectivity problem in which one client system is unable to connect to a server. Both the server and the client system are connected to the same Ethernet network switch. No other users have complained of a problem, and you suspect that faulty network cabling might be to blame. Which of the following troubleshooting steps are you most likely to perform first?
answer
Use a media tester to test the cable between the computer and the network switch.
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You have just been hired as a network administrator. A user has just changed offices and needs you to activate the network and telephone communications in his office. However, the wiring at the punch down block is labeled poorly and you are unable to tell which wires go to the user's office. What should you do?
answer
Use a tone generator to locate the correct wiring.
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You use Cat5e twisted pair cable on your network. Cables are routed through walls and the ceiling. A user puts a screw in the wall to hang a picture and pierces the cable such that a signal sent on pin 1 arrives on the cable connected to pin 7. What term describes this condition?
answer
Short circuit.
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You are a network administrator for your company. A user calls and tells you that after stepping on the network cable in her office, that she can no longer access the network. You go to the office and see that one of the user's stiletto heels has broken and exposed some of the wiring in the Cat 5 network cable. You make another cable and attach it from the wall plate to the user's computer. What should you do next in your troubleshooting strategy?
answer
Test the solution.
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Users report that the network is down. After some investigation, you determine that a specific router is configured such that a routing loop exists. What should you do next?
answer
Determine if escalation is needed.
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A user reports that he cant connect to a specific Web site. You go to the user's computer and reproduce the problem. What should you do next?
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Identify the affected areas of the network.
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You are a network administrator for your computer. A frantic user calls you one morning exclaiming that "nothing is working." What should you do next in your troubleshooting strategy?
answer
Establish the symptoms.
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A router periodically goes offline. Once it goes offline, you find that a simple reboot puts the router back online. After doing some research you find that the most likely cause of the problem is a bug in the router's software. A new patch is available from the manufacturer that is supposed to eliminate the problem. What should you do next?
answer
Identify possible effects of the solution.
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A user is unable to connect to the network. You investigate the problem and determine that the network adapter is defective. You replace the network adapter and verity that it works. What should you do next?
answer
Identify the results and effects of the solution
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A user reports that she cant connect to a server on your network. You check the problem and find out that all users are having the same problem. What should you do next?
answer
Determine what has changed.
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A user reports that she cant connect to the internet. After some investigation, you find the wireless router has been misconfigured. You are responsible for managing and maintaining the wireless access point. What should you do next?
answer
Create an action plan.
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While working on a Linux server, you are unable to connect to Windows Server 2003 system across the Internet. You are able to ping the default gateway on your own network, so you suspect the problem lies outside the local network. Which utility would you use to trace the route a packet takes as it crosses the network?
answer
traceroute.
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You want to be able to view the DNS server address that a computer is using. Which of the following utilities would you use?
answer
ipconfig. ifconfig.
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Examine the following output: Active Connections Proto Local Address Foreign Address State TCP SERVER1:1036 localhost:4832 TIME_WAIT TCP SERVER1:4798 localhost:1032 TIME_WAIT TCP SERVER1:1258 pool-141-150-16-231.mad.east.ttr:24076 CLOSE_WAIT TCP SERVER1:2150 cpe-66-67-255-118.roc.res.rr.com:14100 ESTABLISHED TCP SERVER1:268 C872c-032.cpe.net.cale.rers.com:46360 ESTABLISHED TCP SERVER1:2995 ip68-97-96-186.ok.ok.cox.net:23135 ESTABLISHED Which of the following utilities produced this output?
answer
Netstat
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Which TCP/IP utility gives you the following output?
answer
nbtstat -c.
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Which TCP/IP utility gives you the following output? Interface: 192.168.4.101 on Interface 0x3 Internet Address Physical Address Type 192.168.1.23 00-d1-b6-b7-c2-af dynamic
answer
arp.
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You are troubleshooting a connectivity problem on a Linux server. You are unable to connect to another system on the local network, but are not able to connect to a server on a remote network. You suspect that a default gateway information for the system may be configured incorrectly. Which of the following commands would you use to view the default gateway information on a Linux server?
answer
ifconfig.
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Which TCP/IP utility gives you the following output? Reply from 192.168.1.68: bytes=32 time<10ms ttl=128 reply from 192.168.1.68: bytes=32 time<10ms packets: sent =4, received =4, lost=0 , Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms
answer
ping.
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While troubleshooting a problem on a Linux system, you run a utility that generates the following output:
answer
traceroute
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You manage a local area network with several switches. A new employee has started today so you connect her workstation to a switch port. After connecting the workstation, you find that the workstation cannot get an IP address from the DHCP server. You check the link and status lights and the connection is working properly. A ping to the local loopback address on the workstation succeeds. No other computers seem to have a problem. Which of the following is the most likely cause of the problem?
answer
Incorrect VLAN assignment.
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A user reports that network access from her workstation is very slow. The problem does not seem to be affecting any other ways. Which of the following conditions is the most likely cause?
answer
Duplex mismatch.
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You manage a network with multiple switches. You find that your switches are experiencing heavy broadcast storms. Which of the following will help reduce the effects of a broadcast storm?
answer
Enable spanning tree on the switches.
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Select the statement that best describes a broadcast storm.
answer
A broadcast storm occurs where there are many broadcast messages on the network that they approach or exceed the network bandwidth.
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Which of the following solutions would you implement to eliminate switching loops?
answer
Spanning tree.
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You manage a network with a single switch. On each switch port, a hub connects multiple devices to the switch. Which condition are you most likely to experience on the network?
answer
Collisions.
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You manage a network with multiple subnets connected to the Internet. A user reports that she can't access the new server used in the accounting department. You check the problem and find out that her computer cannot access any server on the subnet, however the computer does access other computers on other subnets as well as the Internet. Which of the following is most likely the cause of the problem?
answer
Missing route on the default gateway router.
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You are the network administrator of a branch office of your company. The branch office network is part of a WAN that covers most of the United States. The office has two Windows 2000 servers, two UNIX severs, one Windows NT server, 90 Windows 98 clients, 40 Windows 2000 Professional clients, and five Macintosh clients. Users have been complaining that they are unable to access resources over the WAN at the main headquarters. You suspect that one of the routers between your office and the main headquarters is not working properly. What TCP/IP utility can you use to see if a router is not working properly?
answer
tracert.
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You are troubleshooting access to a server in a remote network. You use the tracert command and see the following: Trace route to 192.168.2.250 over a maximum of 30 hops: 1 2 ms 2 ms 2 ms 192.168.12.11 2 2 ms 2 ms 2ms 192.168.11.1 3 5 ms 5 ms 3 ms 192.168.10.15 4 2 ms 2 ms 2 ms 192.168.9.1 5 5 ms 5 ms 3 ms 192.168.11.1 6 2 ms 2 ms 2 ms 192.168.10.15 7 5 ms 5 ms 3 ms 192.168.9.1 ...additional output omitted What is the problem?
answer
Routing loop.
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Which of the following commands would display the output shown here?
answer
route print.
question
You manage a network of multiple subnets connected to the Internet. A user reports that she can't access the Internet. You investigate the problem and find that she can access all hosts on the private network, but no hosts on the Internet. Which of the following is likely the cause of the problem?
answer
Missing default route on a router.
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You have a remote access server to accept dial-up connections for remote access clients. Remote clients are able to connect successfully and access resources on the remote access server. However, the remote clients are not able to connect to other devices located on the same subnet where the remote access server is located. Which action would likely correct the problem?
answer
Enable proxy arp on the LAN connection for the remote access server.
question
Examine the following output: 4 22 ms 21 ms 22 ms sttlawa01gr02.bb.ispxy.com [154.11.10.62] 5 39 ms 39 ms 65 ms plalca01gr00.bb.ispxy.com [154.11.12.11] 6 39 ms 39 ms 39 ms Rwest.placa01gr00.bb.ispxy.com [154.11.3.14] 7 40 ms 39 ms 46 ms svl-core-03.inet.ispoxy.net [205.171.206.29] 8 75 ms 117 ms 63 ms dia-core-01.inet.ispxy.net [205.151.142.1] Which of the following produced this output?
answer
tracert.
question
You have just connected a new computer to your network. The network user static IP addressing. You find that the computer can communicate with hosts on the same subnet, but not with hosts on a different subnet. No other computers are having a problem Which of the configuration values would you most likely need to change?
answer
Default gateway.
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Which TCP/IP utility gives you the following output? 2 14 ms <10 ms 14 ms Loopback0.GWI.SLT1.ALTER.NET [137.39.2.123] 3 14 ms <10 ms 13 ms 122.at-6-0-0.XR1.SLT4.ALTER.NET [152.63.91.86] 4 <10 ms 14 ms <10 ms 0.so-0-1-0.TL1.SLT4.ALTER.NET [152.63.1.210] 5 41 ms 41 ms 41 ms 0.so-7-0-0.TL1.PQR3.ALTER.NET [152.63.32.41] 6 42 ms 41 ms 41 ms 0.so.6-0-0.XL1.SEA1.ALTER.NET [152.63.38.82] 7 41 ms 41 ms 41 ms PQS6-0.GW11.SEA1.ALTER.NET [152.63.107.17]
answer
tracert.
question
Which of the following utilities would you use to view the routing table?
answer
route.
question
Consider the following output for a dig command run on a Linux system. ; < DiG 82 <> westsimlll.com ;;res options;init recurs defnam dnsrch ;;got answer: ;;->>HEADER<<-opcode:QUERY, status: NOERROR, id:4 ;;flags: qr rd ra; QUERY:1 ANSWER:1, AUTHORITY:2, ADDITIONAL:0 ;;QUERY SECTION ;;westsimlll.com, type = A, class = IN ;;ANSWER SECTION: westsimlll.com 7h33m IN A 76.141.43.129 ;;AUTHORITY SECTION: westsimlll.com. 7h33m IN NS dns1.deriatct111.com. westsimlll.com. 7h33m IN NS dns2.deriatct222.com. ;;Total query time: 78 sec ;;FROM: localhost.localdomain to SERVER:default --202.64.49.150 ;;WHEN: Tue Feb 16 23:21:24 2005 ;;MSG SIZE sent: 30 rcvd:103 What is the IP address of the DNS server that performed this name resolution?
answer
202.64.49.150
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After installing a new DHCP server on the network, you need to verify that the network devices are receiving IP addresses via DHCP. You reboot a Windows XP client system and using the ipconfig command, receive the following information: Ethernet adapter Local Area Connection 1: Description: CardBus-II 10/100 PC Card Physical Address : 02-00-4C-3F-50 DHCP Enabled : Yes Auto configuration Enabled : Yes Auto configuration IP Address : 169.254.25.129 Subnet : 255.255.0.0 Default Gateway: DNS Servers: Which of the following statements are true?
answer
The client system is unable to reach the DHCP server. The client system is configured to use DHCP.
question
You are troubleshooting a network connectivity issue on a UNIX system. You are able to connect to the remote system by using their IP address, but unable to connect using the hostname. You check the TCP/IP configuration, and note that a DNS server IP address is configured. You decide to run some manual resolution queries to ensure that the communication between the UNIX system and the DNS server are working correctly. Which utilities can you use to do this?
answer
nslookup. dig.
question
Mary calls to tell you that she can't to an intranet server called WebSrv1. From her computer, you ping the server's IP address. The ping test is successful. Which tool would you use on her workstation next to troubleshoot the problem?
answer
nslookup.
question
CorpServ is a small company with 14 client systems and a network printer. Because there are only a limited number of networked systems, you decide to use APIPA addressing for the network. With APIPA configured, all systems are able to communicate with each other but you are having trouble configuring Internet access. What is the likely cause of the problem?
answer
Private addresses cannot directly communicate to hosts outside the local subnet.
question
Consider the following output: ;; res option: init rescuers defnam dnsrch ;;got answer ;;->>HEADER;<<-opcode:QUERY, status; NOERROR, id:4 ;;flags: gr rd ra; QUERY:1, ANSWERS:1, AUTHORITY:2, ADDITIONAL:0 ;;QUERY SECTION: ;;westsimlll.com, type = A, class = IN ;;ANSWER SECTION; westsimlll.com. 7h33m IN A 76.141.43.129 ;;AUTHORITY SECTION: westsimlll.com. 7h33m IN NS dns1.deriact111.com. westsimlll.com. 7h33m IN NS dns2.deriact222.com. ;;Total query time: 78 sec ;;FROM: localhost.localdomain to SERVER: default -- 202.64.49.150 ;;WHEN: Tue Feb 6 23:21:24 2005 ;;MSG SIZE sent: 30 rcvd: 103 Which of the following utilities produced this output?
answer
dig.
question
A user reports that he can't browse to a specific Web site on the Internet. From his computer, you find that a ping test to the Web server succeeds. A trace route test shows that 17 hops to the destination Web server. What is the most likely cause of the problem?
answer
Incorrect DNS server address.
question
You are implementing a DHCP server for your segment. Your segment's IP address is 192.168.1.0. Your default gateway address is 192.168.1.254. Your DNS server address is 192.168.1.1. Your default gateway is configured as a NAT router to translate addresses between network segments. YOu configured the 03 Router option on your DHCP server so it can deliver the IP address of the default gateway to workstations. After configuring your workstations to get their IP address information dynamically, your users complain that they are unable to access web sites on the Internet. How can you resolve this problem?
answer
You must configure your DHCP server with an option that delivers the IP address of the DNS server (Option 06).
question
Examine the following output: Server: helicuplar.xct.takro.net Address: 209.53.4.130 Name: westsim.com Address: 64.78.193.84 Which of the following utilities produced this output?
answer
nslookup.
