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Details

4.4
Given a scenario, troubleshoot wired and wireless networks with appropriate tools
53
Computer Science
Post-Graduate
01/21/2017

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Cards

Term
In what circumstance would you use the nslookup utility?
Definition
To verify a computer’s name from its Internet Protocol (IP) address
Term
What does the nslookup utility do?
Definition
Verifies a computer's name from its IP address or its IP address from its name
Term
Several users report that their Wi-Fi connectivity is low and it causes a problem with network throughput and often results in data loss. What can you check to find the cause of the problem?
Definition
Check the radio frequency (RF) signal strength of the access point
Term
You have a user who complains that, while they can connect to everything on the network, they cannot connect to the Internet, but other users can. Where do you look to solve the problem?
Definition
Check the user’s default gateway in Transmission Control Protocol/Internet Protocol (TCP/IP) network settings
Term
What does the ipconfig/release command do?
Definition
Clears a leased IP address or an IP address from APIPA
Term
An incorrectly configured hosts file on a user workstation can result in what problem?
Definition
It can result in failed services or connections to the incorrect hosts.
Term
What is the result of entering the ipconfig /renew command?
Definition
The computer will lease a new IP address from a Dynamic Host Configuration Protocol (DHCP) server.
Term
What does the ipconfig /release command do?
Definition
Release the IP address assigned to it by the DHCP server or APIPA
Term
What does the ipconfig /all command do?
Definition
Display the DNS domain name, IP address, subnet mask, and default gateway
Term
What does the ipconfig / registerdns command do?
Definition
It registers the client with its DNS server
Term
To use the netdom command utility, what must you have in place?
Definition
Active Directory Domain Services (AD DS)
Term
You have a single user who cannot connect to the Internet, but the user can connect to all internal servers, to printers, and to internal web servers. What should you check as the probable cause?
Definition
Check the user's browser’s proxy settings
Term
What item would you NOT use to create a network Ethernet patch cable?
Definition
A punch down tool
Term
Several users notify you that the network is slow. How do you investigate the problem?
Definition
Check the switch or switches for activity
Term
Which of the following Linux commands is the equivalent to the Windows tracert command?
Definition
traceroute
Term
Which of the following Windows commands do you use to browse all local network computers and their shared resources?
Definition
Net view
Term
What is a potential remedy for increased network traffic that is not caused by malware or a distributed denial-of-service (DDoS) attack?
Definition
Power cycle network switches and the Internet-facing router
Term
Which tool would you use to troubleshoot network issues such as interference and signal strength on a wireless network?
Definition
A Wi-Fi spectrum analyzer
Term
Which command do you use on a Windows system to view Internet Protocol (IP) addresses, network interface card (NIC) media access control (MAC) addresses, and extended network information of the local system?
Definition
ipconfig /all
Term
IP address conflicts can occur on a network when system administrators do what to workstations without performing some preparative work on the Dynamic Host Configuration Protocol (DHCP) server?
Definition
When they assign static Internet Protocol (IP) addresses
Term
If you attempt to connect to a known wireless network Service Set Identifier (SSID), but receive a message that the SSID is not found, what is the problem?
Definition
Someone has changed the access point’s SSID.
Term
You need to check the end-to-end connectivity of a cable. Which of the following tools do you use for this task?
Definition
Media tester
Term
Several users report that they cannot connect to the Internet. You try from your workstation and verify that you too cannot connect to the Internet. What do you check as a possible point of failure?
Definition
Check the Internet router for connectivity to your provider
Term
A user tells you that she cannot connect to some network resource while others are readily accessible and no one else has the same problem. What do you check in order to investigate this problem?
Definition
Check the user’s Active Directory and shared resource permissions
Term
Which of the following commands would you use to view active network connections to your computer?
Definition
netstat
Term
What does the netstat command do?
Definition
Provides you with a list of active connections and their statuses
Term
What diagnostic information does the ping command return to you?
Definition
Round-trip network speed from the local host to the remote host
Term
What is the correct method to renew a Dynamic Host Configuration Protocol (DHCP) Internet Protocol (IP) address lease on a Windows computer if the computer already has a good IP address leased?
Definition
ipconfig /release and ipconfig /renew
Term
Which database does the nslookup utility query for information about a host?
Definition
Domain Name System (DNS)
Term
Which Windows command line utility do you use to map a network drive to a shared resource on another computer?
Definition
net
Term
Which networking command allows you to confirm that the computer can connect to a Domain Name System (DNS) server and resolve an IP address for a given computer name?
Definition
Nslookup
Term
What does the ping command allow you to do?
Definition
Allows you to test TCP/IP communications by sending a few test packets to a host that you specify in the command
Term
What does the ipconfig command allow you to do?
Definition
Verify the configuration of Transmission Control Protocol/Internet Protocol (TCP/IP) and to release or renew Dynamic Host Configuration Protocol (DHCP) IP address leases.
Term
You note that computers that cannot connect to the Internet have Internet Protocol (IP) addresses configured with the common format: 169.254.xxx.xxx. What does this IP address tell you?
Definition
The Dynamic Host Configuration Protocol (DHCP) service is offline.
Term
What does nbtstat command do?
Definition
Helps you find the media access control (MAC) address of a remote Windows server?
Term
What is the correct syntax for the command to ping another computer until you stop it manually?
Definition
ping -t hostname
Term
An Internet Protocol (IP) address conflict on your network can be indicative of which type of problem?
Definition
A problem with the Dynamic Host Configuration Protocol (DHCP) server
Term
Which tools do you use to trace and to locate voice, audio, and video cabling on a network?
Definition
A tone generator and a tone probe
Term
Your computer connects to a wired network, but it has no network connectivity. What do you check first in troubleshooting the problem?
Definition
Check for physical connectivity from the computer’s network card to the wall plug
Term
If you set up your Dynamic Host Configuration Protocol (DHCP) server to resolve Internet Protocol (IP) address conflicts, which of the following problems does this action resolve?
Definition
Assignment of duplicate IP addresses
Term
What does the tracert do?
Definition
It helps you determine the points along the route the computer uses to send a packet to a destination
Term
You find that you have no network connectivity after a thorough physical connectivity check between your computer and the Ethernet jack. What do you check next?
Definition
Verify that the operating system recognizes the network interface card (NIC)
Term
What is the tool that you use to test Ethernet network interface cards (NICs)?
Definition
Loopback plug
Term
What is a loopback plug used for?
Definition
To test Ethernet NICs
Term
Which Linux command corresponds to the Windows ipconfig command?
Definition
ifconfig
Term
What does the tracert Windows command line do?
Definition
Tests all points along a route to a specific host or destination
Term
Because of user complaints of intermittent network connectivity, you investigate cabling in the ceiling to find that many cables cross your office’s fluorescent light ballasts. Why is this discovery a probable source of the connectivity problems?
Definition
Light ballasts produce a large amount of electrical noise.
Term
Several users report that they can only see and connect to other workstations, but cannot connect to other network resources or to the Internet. What common failure point do you check?
Definition
Check the Dynamic Host Configuration Protocol (DHCP) server
Term
If you cannot resolve a high network traffic condition by restarting network components, what is your next course of action to find and resolve the problem?
Definition
Power down each computer on your network until you find the one that might have a network problem
Term
If a user on your network experiences intermittent network connectivity, what is the most likely cause?
Definition
Electrical noise or electrical interference
Term
If you have exhausted all troubleshooting possibilities in your network for slow performance or for intermittent connectivity problems, where should you turn to next for a solution?
Definition
Check with your Internet provider for any outages or problems
Term
Tone generators and tone probes are devices typically used for which purpose?
Definition
Tracing telephone wire pairs
Term
You are notified that a user's Wi-Fi signal is very weak—to the point of being unusable. What do you check for the user?
Definition
Check sources of signal interference near the user
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