5.0 Network Troubleshooting and Tools

Question 1

what kind of attack floods a layer 2 switch with traffic?

Answer 1

ARP poisoning

Question 2

you can access resources using their IP address, but not using their name. why?

Answer 2

names not resolving because DNS not working not configured correctly

Question 3

what is the result if a client is assigned an incorrect network mask?

Answer 3

the client will not be able to access any other resources in the network

Question 4

what is the result if a client is assigned an incorrect gateway?

Answer 4

the client will not be able to access resources outside the network.

the gateway is often referred to as the default gateway

Question 5

what is the result of packet loss on VoIP phone calls?

Answer 5

choppy calls that intermittently drop

Question 6

what should be enabled to allow people to easily find a wireless network?

Answer 6

SSID broadcasting

Question 7

what are three common issues that can impact VoIP quality?

Answer 7

latency, jitter, and packet loss

Question 8

what is it called when wireless signals bounce off surfaces, such as metal or glass, causing poor connectivity?

Answer 8

reflection

Question 9

what is it called when a user connects to the incorrect wireless network within an organization?

Answer 9

wrong SSID

Question 10

what is a symptom of wireless interference?

Answer 10

intermittent connectivity

Question 11

how can you reduce the distance of a wireless network’s reception?

Answer 11

reduce signal strength

Question 12

what type of twisted pair cable provides the best protection against EMI?

Answer 12

STP (shielded twisted pair)

Question 13

what cable type provides the best protection against EMI?

Answer 13

fiber

Question 14

what can occur if cable is run over a fluorescent light fixture?

Answer 14

EMI

Question 15

what is the result of PC and a switch communication with different duplex modes?

Answer 15

duplex mismatch

Question 16

what is an undesired effect of bundling UTP cables tightly together?

Answer 16

Crosstalk

Question 17

what is the delay in response between two systems called?

Answer 17

latency

Question 18

what command line tool would you use to view the TCP configuration on a linux system?

Answer 18

Ifconfig

Question 19

what command line tool would you use to view the TCP configuration on a windows system?

Answer 19

Ipconfig

Question 20

what hardware tool is used to locate the other end of a cable?

Answer 20

toner generator

Question 21

what software tool is used to show open connections on a computer?

Answer 21

Netstat

Question 22

what software tool is used to show known routes?

Answer 22

Route (route print)

Question 23

what software tool is used to show MAC address to IP address mappings?

Answer 23

Arp

Question 24

what software tool is used to check DNS from a Microsoft system?

Answer 24

nslookup

Question 25

what software tool is used to check DNS from a linux system?

Answer 25

dig

Question 26

what command provides information about the entire path between two systems?

Answer 26

tracert (or traceroute)

Question 27

what software tool is used to check connectivity with a remote system?

Answer 27

Ping (or tracert)

Question 28

what hardware tool is used to measure voltages?

Answer 28

multimeter

Question 29

what hardware tool can identify the location of a break in a fiber cable?

Answer 29

OTDR

Question 30

what tool is used to capture and analyze traffic sent over a network?

Answer 30

protocol analyzer (or packet sniffer)

Question 31

what can a port scanner determine?

Answer 31

Open ports these ports also indicate running services and protocols on a system

Question 32

what hardware tool is used to connect an RJ-45 connector to a twisted pair cable?

Answer 32

crimper

Question 33

what hardware tool can verify a twisted pair cable doesn't have any breaks?

Answer 33

cable tester

Question 34

what is the name of the physical device when referring to a hop?

Answer 34

Router

Question 35

what should you do after testing a theory and determining a cause for a problem?

Answer 35

establish a plan of action to resolve the problem and identify potential effects

Question 36

what should you do after implementing a solution?

Answer 36

verify full system functionality

Question 37

what should you do after establishing a theory of probably cause?

Answer 37

test the theory to determine the cause

Question 38

what is the last step in the CompTIA troubleshooting model?

Answer 38

document findings, actions, and outcomes

Question 39

after identifying the problem, what is the next step?

Answer 39

establish a theory of probable cause

Question 40

what is the first step in the CompTIA troubleshooting model?

Answer 40

identify the problem (gather information, identify symptoms, question users, and determine if anything has changed)