5.0 Network Troubleshooting and Tools Flashcards
what kind of attack floods a layer 2 switch with traffic?
ARP poisoning
you can access resources using their IP address, but not using their name. why?
names not resolving because DNS not working not configured correctly
what is the result if a client is assigned an incorrect network mask?
the client will not be able to access any other resources in the network
what is the result if a client is assigned an incorrect gateway?
the client will not be able to access resources outside the network.
the gateway is often referred to as the default gateway
what is the result of packet loss on VoIP phone calls?
choppy calls that intermittently drop
what should be enabled to allow people to easily find a wireless network?
SSID broadcasting
what are three common issues that can impact VoIP quality?
latency, jitter, and packet loss
what is it called when wireless signals bounce off surfaces, such as metal or glass, causing poor connectivity?
reflection
what is it called when a user connects to the incorrect wireless network within an organization?
wrong SSID
what is a symptom of wireless interference?
intermittent connectivity
how can you reduce the distance of a wireless network’s reception?
reduce signal strength
what type of twisted pair cable provides the best protection against EMI?
STP (shielded twisted pair)
what cable type provides the best protection against EMI?
fiber
what can occur if cable is run over a fluorescent light fixture?
EMI
what is the result of PC and a switch communication with different duplex modes?
duplex mismatch
what is an undesired effect of bundling UTP cables tightly together?
Crosstalk
what is the delay in response between two systems called?
latency
what command line tool would you use to view the TCP configuration on a linux system?
Ifconfig
what command line tool would you use to view the TCP configuration on a windows system?
Ipconfig
what hardware tool is used to locate the other end of a cable?
toner generator
what software tool is used to show open connections on a computer?
Netstat
what software tool is used to show known routes?
Route (route print)
what software tool is used to show MAC address to IP address mappings?
Arp
what software tool is used to check DNS from a Microsoft system?
nslookup
what software tool is used to check DNS from a linux system?
dig
what command provides information about the entire path between two systems?
tracert (or traceroute)
what software tool is used to check connectivity with a remote system?
Ping (or tracert)
what hardware tool is used to measure voltages?
multimeter
what hardware tool can identify the location of a break in a fiber cable?
OTDR
what tool is used to capture and analyze traffic sent over a network?
protocol analyzer (or packet sniffer)
what can a port scanner determine?
Open ports
these ports also indicate running services and protocols on a system
what hardware tool is used to connect an RJ-45 connector to a twisted pair cable?
crimper
what hardware tool can verify a twisted pair cable doesn’t have any breaks?
cable tester
what is the name of the physical device when referring to a hop?
Router
what should you do after testing a theory and determining a cause for a problem?
establish a plan of action to resolve the problem and identify potential effects
what should you do after implementing a solution?
verify full system functionality
what should you do after establishing a theory of probably cause?
test the theory to determine the cause
what is the last step in the CompTIA troubleshooting model?
document findings, actions, and outcomes
after identifying the problem, what is the next step?
establish a theory of probable cause
what is the first step in the CompTIA troubleshooting model?
identify the problem (gather information, identify symptoms, question users, and determine if anything has changed)
