Hardware and Network Troubleshooting: Given a scenario, troubleshoot wired and wireless networks with appropriate tools Flashcards
If a user is issued an APIPA, what most likely caused this?
The DHCP server is down
What command would you use to view a server’s DNS entry on the DNS server?
nslookup
What two ipconfig commands will ensure a network computer receives a new IP address and replaces the old one?
- ipconfig /release
- ipconfig /renew
What’s the first tool you should use when diagnosing complaints that a user can’t access a company’s website?
ping
This tool can be used to test the connection between two computers
The ______ is the IP address of the router that forwards the data
Default gateway
Workstations read entries in their _______ files before making requests to DNS
HOSTS
What command allows you to view open ports on a computer?
netstat
What switch will allow you to continuously send pings until stopped with the break command?
-t
What tool would you use to trace a network cable back to the central wiring closet?
A tone generator
You can NOT access a website using it’s FQDN (fully qualified domain name), but you can using its IP address. This indicates what?
The DNS (domain name server) is down
An IP address of 169.254.184.25 with a subnet mask of 255.255.0.0 is what?
APIPA (Automatic private IP addressing)
The subnet mask for an APIPA is always 255.255.0.0
This command will display the path that data travels through a network, beginning at the host, and ending at the specified computer name or IP address
tracert
If your computer is assigned the wrong _____, it will be able to communicate with other computers on the same network, but not with computers on other networks
Default gateway
The _____ will allow display the IP address for your local windows computer
ipconfig
After replacing a laptop wireless network card, what is the first thing you should do after connecting the internal antenna cables and rebooting the computer?
Install the latest drivers for the wireless card
If a computer could connect to a network yesterday, but not today, you should start by using the ___ command
ipconfig
The most likely cause is incorrect TCP/IP configuration, which will be displayed using the ipconfig command
The ipconfig ______ switch lists all the TCP/IP configuration parameters for the computer on which it is run
ipconfig /all
The _____ command tests connectivity to a remote host
Ping
The ____ command displays network configuration settings for the local computer
ipconfig
The _____ command verifies entries on a DNS server
nslookup
The ____ command diagnoses problems with the netBIOS name resolution
nbtstat
The most likely cause of most connectivity issues is to check the _______
Connection
If a user can’t connect to a file server on a 100BaseT network, but can connect to folders on other computers, with a single hub on the network, what two hardware problems could be the cause?
- Defective hub port
- Defective NIC in the file server
A ______ must be specified for a host to connect to hosts outside the local network, on small networks, this is the address of the router that connects the local network to the internet
Default gateway
The ____ command will display the IP address and DNS name of every node that a data packet passes through on its way to a remote computer or location, along with the time required for the data packet to travel through each node
tracert
A network administrator has changed the IP address of several servers on the network. A user is now unable to connect to file shares on those servers. What command would you run in this scenario?
ipconfig /flushDNS
This will flush the contents of the client computer’s DNS cache
Wireless devices use the 2.4GHz range, which is also used by common devices such as _______ and ______
- Cordless phones
- Microwaves
A _____ is used to connect the end of an ethernet cable to an RJ-45 cable
Wire crimper
A NIC port has no lights, what are three possible solutions for this issue?
- Check that the switch is on
- Check if the other end of the cable is connected to the switch
- Replace the network cable
A TDR (time domain reflectometer) is returning a signal too early. What does this indicate?
There is a break in the network cable, and the cable should be replaced
A _____ is responsible for resolving host names to TCP/IP addresses
Domain Name System (DNS)
A table of NetBIOS names resolution and registration statistics will be displayed when you issue the ______ command
nbtstat -r
