network plus 5

Check the default gateway address

A PC on the company network is unable to ping any addresses on the Internet, but it can ping a workstation in the office across the hallway. Other workstations sharing the same network ID have no issues connecting to the Internet. Which of the following is the FIRST thing to check?

Frequency interference

A consultant has been brought in to inspect an office that has encountered frequent wireless issues. A wireless survey of the area shows that there are seven nearby SSIDs. The company's Wi-Fi network is on channel six, as are three of the other found networks. Which of the following is MOST likely causing the issues?

Turn down the signal gain. Replace the WAP's antennas with directional antennas.

A customer wants to have her wireless network to be accessible only in the conference room. She has placed a WAP in the conference room, but has noticed that offices across the hall also receive the wireless signal. Which of the following could be done together to solve this problem? (Select TWO.)

The wireless router doesn't have a default gateway configured properly.

A gaming café has just installed a new 802.11n Wi-Fi router to provide free Internet access to patrons. The users quickly complain that, while they can access the gaming server that's on the local network, they can't access the Internet at all. What's most likely the problem?

There are other wireless devices in the area that operate on the wireless band and on the same wireless channel.

A home user is experiencing performance issues with her wireless network. She has checked the following issues: Checked to make sure the laptop is within the appropriate wireless network range Checked the connected SSID and wireless channel Checked that the laptop is the only device connected to the wireless network Which is the MOST likely cause for the performance issues?

The closest APs are down.

A large office has a group of 15 users. Some of the users complain of poor performance. After scanning the network's performance, the network engineer discovers that many of the computers show moderate to weak signals even though there are two APs less than 15 feet (4 meters) away in either direction. Which of the following is MOST likely the cause?

Transmission power

A network administrator wants to contain the footprint of the company's wireless signal so that it is limited to the office borders. Which feature of the company's WAPS should he adjust to meet this requirement?

ifconfig

A network administrator, is having intermittently lost connections with a local Linux server. She decides to check the IP address on the server to see if it conflicts with any other IP addresses on the network. Which of the following commands should Lisa use?

Determine if anything has changed.

A network technician, Ellen, receives a support ticket. The ticket does not provide enough information for Ellen to determine the problem. Which of the following should she perform FIRST before responding to the ticket?

The port on the switch is configured incorrectly.

A network user has an illuminated LED on his NIC that shows his computer is connected to a switch, but the user cannot access any network resources. What is MOST likely cause of the problem?

Syslog

A technician believes that there is a duplicate IP address on the network. Which resource can best help her to verify this problem?

SSID

A technician is installing a wireless network using the 802.11n wireless protocol. To enhance network security, he does not want the access point to broadcast the network name. What characteristic of the access point should he disable?

Document findings, actions, and outcomes.

A technician is troubleshooting a problem and has verified full system functionality. According to the troubleshooting model, what should the tech's NEXT step be?

nslookup

A technician needs to determine the IP address of a Web server. She knows the FQDN of the server. Which utility can she use to do this?

dig

A technician notes that DNS lookups of a certain host are not always successful. Which tool could the technician use that would MOST likely verify this problem?

Incorrect VLAN

A user calls from the accounting department complaining that he only sees the server used by distribution, not the accounting server. A check of his IP address shows that he indeed got the wrong IP address from the DHCP server. What could be the problem?

The printer was configured for DHCP.

A user cannot print to one of the networked printers. The cable has been confirmed as good and the VLAN is correctly configured at the switch. Which of the following is the MOST likely explanation?

Cable certifier

A user in a newly wired office reports that they cannot connect to the network. The network technician notices that the link light on the users NIC is not illuminated. What equipment would the technician use to verify correct wiring from the office to the patch panel?

Ask the user if anything has changed on the system.

A user is no longer able to access the shared accounting files, but others still have normal access to the share. What is the FIRST step in troubleshooting this issue?

She will receive a signal, but will not be able access the network.

A user on an IEEE 802.11b network has entered an incorrect WEP key. What will be the result?

Switch loop

A user reports that the company network is down. Ace technician, Arnold Grimmer walks into a communications closet and sees that there is a short patch cable with both ends plugged into two ports on the same switch. Which term describes what he saw?

Weak signal strength

A user that is connected to a wireless network moves a laptop from her desk to a conference room. When she arrives at the conference room, she notes that the laptop is trying to reconnect to the wireless network. Which of the following is a common wireless problem that can cause this issue?

The RADIUS server is down.

A wireless network is secured with WPA2 Enterprise. Clients are unable to connect to the network. What is the MOST likely explanation for this problem?

1901-2010

Also known as HomePlug, this IEEE standard governs how multimedia data streams can be run over in-home power wires.

Incorrect DNS

Clark is a user who took his laptop on a vacation to Wally World. He configured the laptop to match the wireless setting at the hotel. Clark can reach his FTP server using the FTP server's IP addresses, but he cannot access any Internet resource by their URL.

Tracert

Everyday at the office, we play Counter Strike Source over the Internet (only during lunch hour, of course). Today, however, there is a lot of lag in the action--our mutual connection is bogged down somewhere. What could I use in Windows to find out where the bottleneck is occurring?

Determining IP addresses of a remote host via DNS name Checking for dropped packets

For which of the following jobs would using ping make sense? (Select two.)

Toner

Fox and Hound is a brand name for what device?

Do a DHCP renew via the router's Web browser interface.

Fred has just purchased a new home router for his SOHO Internet connection. He cannot get on the Internet. He opens the Web browser interface for the router and determines that his WAN address is 0.0.0.0. Which of the following is the BEST way to resolve this?

The DNS server is not working correctly.

George is unable to surf the Web. No matter what address he enters, he receives the message, "The page cannot be displayed." On George's system, you can ping 64.226.214.168, but when you ping www.totalsem.com, you receive the message "Server not found." What problem does this indicate?

Cable tester

Gisselle is a network technician checking why some newly installed UTP cables are not working. She suspects that some of the ends were not properly terminated. Which tool could she use to verify this?

Test the theory to determine the cause.

Given a network problem scenario, a technician should identify the problem, then establish a theory for the cause of the problem. What is the next logical troubleshooting step?

Establish a theory of probable cause.

Gwen is a corporate user who cannot access any network resources. The technician has determined that the problem is isolated to Gwen. There have been no changes to her workstation or switch port recently. Which of the following steps in the troubleshooting should the technician do NEXT?

Ping Woobie

I can't see your machine (Woobie) on the network, but you insist that your machine is up. Which of the following commands might I try to test my connection with your machine?

Netstat

I need to find out what connections are currently open on my local machine. What utility might help me do that?

Ifconfig

If I wanted to find my IP address and subnet mask on a Linux PC, which command would I use?

netstat -r

If you run "route print" at a Windows command prompt, you will get this output: Route Table Interface List 0x1 ........................... MS TCP Loopback interface 0x10003 ...00 11 d8 30 16 c0 ...... NVIDIA nForce Networking Controller - Virt l Machine Network Services Driver =========================================================================== =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.12.14.1 10.12.14.101 1 10.12.14.0 255.255.255.0 10.12.14.101 10.12.14.101 1 10.12.14.101 255.255.255.255 127.0.0.1 127.0.0.1 1 10.255.255.255 255.255.255.255 10.12.14.101 10.12.14.101 1 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 169.254.0.0 255.255.0.0 10.12.14.101 10.12.14.101 30 224.0.0.0 240.0.0.0 10.12.14.101 10.12.14.101 1 255.255.255.255 255.255.255.255 10.12.14.101 10.12.14.101 1 Default Gateway: 10.12.14.1 =========================================================================== Persistent Routes: None What other command will give you the exact same output?

The cable is not a crossover.

In a stack of connected switches, a technician discovers one switch is not communicating with the others. What is the MOST likely reason?

DHCP

It's an old story: a user is unable to access the Internet. The network administrator checks the workstation and sees that it has an APIPA address. What service is MOST likely not functioning correctly to have caused this?

Simultaneous transmission to multiple users

MU-MIMO is a feature of the 802.11ac wireless standard. What does it provide?

DNS

Many users on a small network report that while they can share files with each other, they can no longer access the Internet. Troubleshooting reveals that Internet addresses are failing to resolve to IP addresses. Which technology is malfunctioning?

DNS is not configured correctly.

Melissa can connect remotely to her office through a VPN. The connection seems to be set up properly, but she can't access shared folders on any other computer by name. She can ping the other servers successfully. What could be the problem?

Cross-talk

Network administrator Kwan suspects that one of the copper network cables is faulty. When examining the suspect cable, Kwan notices that some of the pairs are untwisted too much. This is MOST likely causing which of the following?

ARP

Network tech Salah wants to troubleshoot a problem on a workstation with the IP address of 192.168.1.45. Salah will use a packet analyzer to identify the workstation's packets but needs to the workstation's MAC address. Which of the following protocols would provide the needed information?

TX/RX reversed

Network technician Kyle is troubleshooting a connectivity problem with a new data circuit. Kyle confirms that the ST fiber jumper is good. Which of the following is the problem?

Port filtering

Network upgrades have been completed and the network protocols have been modernized. The WINS server was shut down. Since there is no need for NetBIOS traffic, it will no longer be allowed on the network. Which of the following will accomplish this objective?

Packet analyzer

One of the servers on your network might be down. What tool would be the best option for troubleshooting this problem?

A user plugged both ends of a patch cable into the switch jacks.

Over the course of a day, network administrator Asa noticed that the network was slowing down. Within an hour of the first symptom, the network was showing 100% utilization. While investigating the issue, Asa discovered that most of the traffic was coming from just one of the switches. Which of the following scenarios is MOST likely the cause?

route

Patton is a network technician who needs to check the default router settings on a server. Which command can he use on the server to display the default router setting?

Incorrect DNS settings

Phylicia is trying to open a page on her favorite Web site, but her browser shows a message that says, "This page cannot be displayed." However, she can successfully ping the default gateway. Which of the following is the MOST likely cause of the problem?

Banner grabbing

Probing a host's open ports to learn more about its services and vulnerabilities is known as what?

Identify affected areas of the network.

Sam calls in complaining that "the Internet is down," which probably means his computer has lost it's network connection. What should you do first to begin troubleshooting this problem?

Electrical interference in the cable

Sandy's computer has been intermittently having problems. Other computers on the network are not having any problems. You have determined that when the lights are off in Sandy's office, she can connect to the network, but when her lights are on, her connectivity is unreliable. What could be the problem?

The wireless access point has lost power

Some users on a wireless network, but not all, are having trouble accessing certain network resources. Which of the following is the least likely cause?

Ping the loopback address

Stan tells you that he cannot get on the network. You know the link light on the NIC is green and you know the cable is good. He seems to be the only one on the network having this problem. What command line utility and address do you use to run an internal test?

Identify the problem.

The boss can't access the shared Music folder on the network server and he's not happy about it. What should be your first step in troubleshooting the problem?

There is a misconfigured DHCP server.

To accommodate a growing department, a new switch was installed with little configuration. Hosts attached to the new switch sometimes connect to the network and sometimes they don't. There is no discernable pattern to whether a node will successfully connect to the network. Which selection is the most likely cause of the problem?

Loopback plug

To verify a connection at Layer 1, which hardware tool would MOST likely be used?

Network model top-to-bottom approach

Troubleshooting networks add which element to the general troubleshooting model?

Tone probe Tone generator

Two of the following devices work together to trace out a cable: One sends an electrical signal along the cable at a particular frequency; the other one emits a sound when it detects that signal on the cable. What are the two devices? (Select two.)

A second DHCP server is on the network.

Users are seeing messages and warnings on their computers about duplicate IP addresses and are encountering connectivity problems. A quick check of the change management log shows that network technician Ursula installed a new DHCP server on the network last week. Which of the following would cause duplicate IP addresses on the network?

tracert

Users who are retrieving information from a company server on the network are experiencing slow access times. Which tool would provide access time information on each segment of the network to reach the server?

Protocol analyzer

Wesley has contacted your IT department with reports of being disconnected from the file server at random times. Which of the following could a technician use to determine whether or not it is Wesley's PC or the file server that is creating the issue?

ifconfig

What Linux command is used to check or change the IP address settings of a network-interface card?

Nslookup

What Windows utility enables you to query information from the DNS server and change how your system uses DNS?

Net use

What command will assign a drive letter to a network share?

TDR

What hardware network tool is used to determine the length of a cable?

Displays all connections to and from a host computer

What is the primary purpose of netstat?

Change the antenna placement

What might help to increase the signal strength of a Wi-Fi router in a large, open room? Testing reveals that signal strength is weaker in some spots and stronger in others.

Open Network

What type of Wi-Fi network would be the easiest to gain entry to?

Nslookup

What utility generates this output: Server: Unknown Address: 192.168.4.11 Non-authoritative answer: Name: www.totalsem.com Address: 209.29.33.25

UTP

Which of the following cable types is most vulnerable to EMI?

Mismatched standards Incorrect termination

Which of the following hardware problems could prevent a node from attaching to a switch? (Select two.)

UTP cables < 100M

Which of the following is not a common wired network problem?

FTP

Which of the following is not a network information or troubleshooting utility?

Exclusions in the DHCP scope

Which of the following is not a network service problem?

Protocol analyzer

Which of the following tools enables you to inspect network traffic?

netstat

Which of the following utilities generated this output? Proto Local Address Foreign Address State TCP blackbox:1719 72-165-61-143:3239 CLOSE_WAIT TCP blackbox:3718 po-in-f99.google.com:http TIME_WAIT TCP blackbox:3727 po-in-f99.google.com:http TIME_WAIT TCP blackbox:1052 localhost:5226 ESTABLISHED TCP blackbox:5226 localhost:1052 ESTABLISHED

Ping

Which of the following utilities would work best to determine if a node on your network is dropping packets?

Sniffer

Which of the following would enable someone to capture user names and passwords on a network?

Bottom-to-top of the OSI Model Top-to-bottom of the OSI Model Divide and conquer

Which options represent recommended approaches to troubleshooting? (Select three.)

Top-to-bottom of the OSI Model Bottom-to-top of the OSI Model Divide and conquer

Which options represent recommended approaches to troubleshooting? (Select three.)

ARP

Which protocol maps IP addresses to Layer 2 (Data Link Layer) addresses?

LWAPP

Which standard is commonly used to control thin-client wireless access points?

HSRP VRRP

Which technologies and protocols are used to achieve high availability? (Select two.)

Punch down

Which tool does a technician need in order to terminate a CAT5e Ethernet cable to a 110 block?

Punch down tool

Which tool would a network technician need in order to install additional cables to an existing patch panel?

Malicious user

Which type of user is most like to cause a DOS attack?

ipconfig

While working on your LAN, you notice that you cannot access your file server. Which of the following utilities would you use FIRST to troubleshoot the problem?

A host-based firewall is preventing SSH connections.

Xavier can ping a server, but is unable to use SSH to connect to it. What is most likely the cause of this?

Identify symptoms and draw a network diagram.

You are a consultant brought in to troubleshoot a company's network. What step should you preform FIRST to diagnose the issue?

Nbtstat

You are a network administrator attempting to troubleshooting a WINS server. Which tool would you most likely use to diagnose this?

There is a problem with the server NIC.

You are the network administrator with 15 users on a network. None of them have been able to connect to the server for the last 30 minutes. You try pinging the workstations from the server, but you can't ping any of them or the loopback address, even after a reboot. Which of the following statements must be true?

Butt set

You are working with a certified cable installer to troubleshoot the DSL line coming into your office. He thinks that the DSL signal is coming in on the wrong POTS line. Which tool would he use to troubleshoot this issue?

Fiber optic cable

You work for a very security-oriented company. You need to protect the data on your network from people tapping into the cables and stealing your data. What might you use?