697871
Descripción
Test por Róbert Lakatos, actualizado hace más de 1 año
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Creado por Róbert Lakatos
hace alrededor de 10 años
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Pregunta 1
Pregunta
Which two functions are provided by the upper layers of the OSI model? (Choose two.)
Respuesta
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placing electrical signals on the medium for transmission
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initiating the network communication process
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encrypting and compressing data for transmission
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segmenting and identifying data for reassembly at the destination
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choosing the appropriate path for the data to take through the network
Pregunta 2
Pregunta
Which is a function of the transport layer of the OSI model?
Respuesta
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routes data between networks
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converts data to bits for transmission
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delivers data reliably across the network using TCP
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formats and encodes data for transmission
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transmits data to the next directly connected device
Pregunta 3
Pregunta
Which common Layer 1 problem can cause a user to lose connectivity?
Respuesta
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incorrect subnet mask
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incorrect default gateway
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loose network cable
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NIC improperly installed
Pregunta 4
Pregunta
Which three command line utilities are most commonly used to troubleshoot issues at Layer 3? (Choose three.)
Respuesta
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ping
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a packet sniffer
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Telnet
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ipconfig
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Traceroute
Pregunta 5
Pregunta
Which address is used by the router to direct a packet between networks?
Respuesta
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source MAC address
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destination MAC address
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source IP address
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destination IP address
Pregunta 6
Pregunta
What is the correct encapsulation order when data is passed from Layer 1 up to Layer 4 of the OSI model?
Respuesta
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bits, frames, packets, segments
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frames, bits, packets, segments
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packets, frames, segments, bits
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segments, packets, frames, bits
Pregunta 7
Pregunta
What are two goals of the ISP help desk? (Choose two.)
Respuesta
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conserving support resources
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network optimization
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competitive scalability
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customer retention
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sales of network services
Pregunta 8
Pregunta
In what two ways do Level 1 and Level 2 help desk technicians attempt to solve a customer's problems? (Choose three.)
Respuesta
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talking to the customer on the telephone
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upgrading hardware and software
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using various web tools
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making an onsite visit
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installing new equipment
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with remote desktop sharing applications
Pregunta 9
Pregunta
A customer calls the help desk about setting up a new PC and cable modem and being unable to access the Internet. What three questions would the technician ask if the bottom-up troubleshooting approach is used? (Choose three.)
Respuesta
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Is the NIC link light blinking?
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What is the IP address and subnet mask?
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Can the default gateway be successfully pinged?
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is the network cable properly attached to the modem?
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Is the Category 5 cable properly connected to the network slot on the PC?
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Can you access your e-mail account?
Pregunta 10
Pregunta
A customer calls to report a problem accessing an e-commerce web site. The help desk technician begins troubleshooting using a top-down approach. Which question would the technician ask the customer first?
Respuesta
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Can you access other web sites?
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Is there a firewall installed on your computer?
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What is your IP address?
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is the link light lit on your NIC card?
Pregunta 11
Pregunta
Which statement describes the process of escalating a help desk trouble ticket?
Respuesta
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The help desk technican resolves the customer problem over the phone and closes the trouble ticket.
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Remote desktop utilities enable the help desk technician to fix a configuration error and close the trouble ticket.
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After trying unsuccessfully to fix a problem, the help desk technician sends the trouble ticket to the onsite support staff.
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When the problem is solved, all information is recorded on the trouble ticket for future reference.
Pregunta 12
Pregunta
What are two functions of the physical layer of the OSI model? (Choose two.)
Respuesta
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adding the hardware address
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converting data to bits
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encapsulating data into frames
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signal generation
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routing packets
Pregunta 13
Pregunta
A customer calls the ISP help desk after setting up a new PC with a cable modem but being unable to access the Internet. After the help desk technician has verified Layer 1 and Layer 2, what are three questions the help desk technician should ask the customer? (Choose three.)
Respuesta
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What is your subnet mask?
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What is your IP address?
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Is the NIC link light blinking?
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Can you ping the default gateway?
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Is the network cable properly attached to the cable modem?
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Is the network cable correctly connected to the network port on the PC?
Pregunta 14
Pregunta
Which scenario represents a problem at Layer 4 of the OSI model?
Respuesta
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An incorrect IP address on the default gateway.
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A bad subnet mask in the host IP configuration.
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A firewall filtering traffic addressed to TCP port 25 on an email server.
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An incorrect DNS server address being given out by DHCP.
Pregunta 15
Pregunta
What are two basic procedures of incident management? (Choose two.)
Respuesta
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opening a trouble ticket
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using diagnostic tools to identify the problem
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surveying network conditions for further analysis
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configuring new equipment and software upgrades
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adhering to a problem-solving strategy
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e-mailing a problem resolution to the customer
Pregunta 16
Pregunta
Which level of support is supplied by an ISP when providing managed services?
Respuesta
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Level 1
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Level 2
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Level 3
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Level 4
Pregunta 17
Pregunta
What is the first step that is used by a help desk technician in a systematic approach to helping a customer solve a problem?
Respuesta
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identify and prioritize alternative solutions
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isolate the cause of the problem
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define the problem
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select an evaluation process
Pregunta 18
Pregunta
A network technician has isolated a problem at the transport layer of the OSI model. Which question would provide further information about the problem?
Respuesta
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Do you have a firewall that is configured on your PC?
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Do you have a link light on your network card?
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Is your PC configured to obtain addressing information using DHCP?
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What default gateway address is configured in your TCP/IP settings?
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Can you ping http://www.cisco.com?
Pregunta 19
Pregunta
An ISP help desk technician receives a call from a customer who reports that no one at their business can reach any websites, or get their e-mail. After testing the communication line and finding everything fine, the technician instructs the customer to run nslookup from the command prompt. What does the technician suspect is causing the customer's problem?
Respuesta
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improper IP address configuration on the host
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hardware failure of the ISR used to connect the customer to the ISP
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bad cables or connections at the customer site
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failure of DNS to resolve names to IP addresses
Pregunta 20
Pregunta
Which layers of the OSI model are commonly referred to as the upper layers?
Respuesta
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application, presentation, session
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application, session, network
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presentation, transport, network
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presentation, network, data link
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session, transport, network
Pregunta 21
Pregunta
Refer to the exhibit. Host A is unable to communicate with any other hosts. On this network is a DHCP server that is responsible for assigning addresses to hosts. Based on the output of the ipconfig command on host A, what is the most likely cause of the problem?
Image:
2_2_21 (image/jpg)
Respuesta
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The host did not get addressing configuration from the DHCP server.
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The DNS server could not be reached.
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The default gateway interface is down.
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The IP address is a public address and should be private
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