Twentythree Zone

DsmbISP Chapter 2



1.The DHCP server in a lab environment is down when multiple DHCP clients in the lab are
 booted for the first time. Which two statements describe how the DHCP clients will be
 affected by the absence of a DHCP server during boot? (Choose two.)
The clients will not boot completely until the DHCP server resumes functioning.
The clients will attempt via the use of the IP address 127.0.0.1 to communicate with the 
other clients.
All clients with link-local addresses will communicate with each other in a peer-to-peer manner.
A link-local address will be automatically assigned to the hosts by the operating system.
A link-local process will use a DNS query to determine if any other device uses the same 
link-local address.
Scoring Rule For:  correctness of response
Option 3 and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
2
Which is a function of the transport layer of the OSI model?
routes data between networks
converts data to bits for transmission
delivers data reliably across the network using TCP
formats and encodes data for transmission
transmits data to the next directly connected device
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
3
Which statement describes the process of escalating a help desk trouble ticket?
The help desk technican resolves the customer problem over the phone and closes the 
trouble ticket.
Remote desktop utilities enable the help desk technician to fix a configuration error and 
close the trouble ticket.
After trying unsuccessfully to fix a problem, the help desk technician sends the trouble 
ticket to the onsite support staff.
When the problem is solved, all information is recorded on the trouble ticket for future
 reference.
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
4
Which two functions are provided by the upper layers of the OSI model? (Choose two.)
placing electrical signals on the medium for transmission
initiating the network communication process
encrypting and compressing data for transmission
segmenting and identifying data for reassembly at the destination
choosing the appropriate path for the data to take through the network
Scoring Rule For:  correctness of response
Option 2 and Option 3 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
5
Which scenario represents a problem at Layer 4 of the OSI model?
An incorrect IP address on the default gateway.
A bad subnet mask in the host IP configuration.
A firewall filtering traffic addressed to TCP port 25 on an email server.
An incorrect DNS server address being given out by DHCP.
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
6
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?
Can you access other web sites?
Is there a firewall installed on your computer?
What is your IP address?
Is the link light lit on your NIC card?
Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option
Max Value = 2
7
What are two primary goals of the ISP help desk? (Choose two.)
conserving support resources
network optimization
competitive scalability
customer retention
Scoring Rule For:  correctness of response
Option 2 and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2

8
What are two basic procedures of incident management? (Choose two.)
opening a trouble ticket
using diagnostic tools to identify the problem
surveying network conditions for further analysis
configuring new equipment and software upgrades
adhering to a problem-solving strategy
e-mailing a problem resolution to the customer
Scoring Rule For:  correctness of response
Option 1 and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
9
Which three command line utilities are most commonly used to troubleshoot issues 
at Layer 3? (Choose three.)
ping
a packet sniffer
Telnet
ipconfig
traceroute
Scoring Rule For:  correctness of response
Option 1, Option 4, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 3
10
What is the correct encapsulation order when data is passed from Layer 1 up to 
Layer 4 of the OSI model?
bits, frames, packets, segments
frames, bits, packets, segments
packets, frames, segments, bits
segments, packets, frames, bits
Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option
Max Value = 2
11
What are two functions of the physical layer of the OSI model? (Choose two.)
adding the hardware address
converting data to bits
encapsulating data into frames
signal generation
routing packets
Scoring Rule For:  correctness of response
Option 2 and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
12
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.)
Is the NIC link light blinking?
What is the IP address and subnet mask?
Can the default gateway be successfully pinged?
Is the network cable properly attached to the modem?
Is the Category 5 cable properly connected to the network slot on the PC?
Can you access your e-mail account?
Scoring Rule For:  correctness of response
Option 1, Option 4, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 3
13
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.)
What is your subnet mask?
What is your IP address?
Is the NIC link light blinking?
Can you ping the default gateway?
Is the network cable properly attached to the cable modem?
Is the network cable correctly connected to the network port on the PC?
Scoring Rule For:  correctness of response
Option 1, Option 2, and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 3
14
Which address is used by the router to direct a packet between networks?
source MAC address
destination MAC address
source IP address
destination IP address
Scoring Rule For:  correctness of response
2 points for Option 4
0 points for any other option
Max Value = 2
15
What is the first step that is used by a help desk technician in a systematic approach 
to helping a customer solve a problem?
identify and prioritize alternative solutions
isolate the cause of the problem
define the problem
select an evaluation process
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
16
While troubleshooting a connectivity issue on a host, a network administrator issues
 the ping 127.0.0.1 command. The pings are unsuccessful. What is most likely the problem?
The TCP/IP stack is not loaded properly.
The default gateway is down.
ARP is not functioning correctly.
An IP address has not been assigned to the host.
Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option
Max Value = 2
17
An accounting firm experiencing connectivity issues requires Level 3 support from 
the ISP. Which function requires Level 3 or higher support?
the diagnosis of basic network connectivity
the use of diagnostic tools to identify problems
the installation and configuration of new equipment
the documentation of basic user issues
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
18
What Layer 1 problem can cause a user to lose Internet connectivity?
wrong subnet mask
wrong default gateway
loose network cable
wrong MAC address
faulty printer cable
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
19
In what three ways do Level 1 and Level 2 help desk technicians attempt to 
identify a customer's problems? (Choose three.)
talking to the customer on the telephone
upgrading hardware and software
using various web tools
making an onsite visit
installing new equipment
with remote desktop sharing applications
Scoring Rule For:  correctness of response
Option 1, Option 3, and Option 6 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 3
20
DsmbISP Chapter 2 - CCNA Discovery: 在中小型企业或 ISP 工作 (Version 4.1) - 兴高采烈 - 电脑技术学习交流---无限可能……
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?
The host did not get addressing configuration from the DHCP server.
The DNS server could not be reached.
The default gateway interface is down.
The IP address is a public address and should be private.
Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option
Max Value = 2

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