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CCNA DISCOVERY2 V4.1 Module1 +2 (only questions)

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1

Which statement describes a function of a Tier 1 ISP?

 

peers with other similarly sized ISPs to form the global Internet backbone

 

uses the services of Tier 3 ISPs to connect to the global Internet backbone

 

pays Tier 2 ISPs for transit services to connect across continents

 

limits the offered services to small geographic areas

 

 

 

2

Which network utility helps determine the location of network problems and identifies routers that packets travel across?

 

ping

 

ipconfig

 

tracert

 

netstat

 

nslookup

 

 

 

3

 

 

Refer to the exhibit. A host is having problems maintaining a connection to a server at 192.168.100.2. Which statement best describes the output of the ping command?

 

The server is shut down.

 

The server has no route back to the host.

 

Two routers along the path are not responding to pings.

 

Some packets made it to the destination.

 

Ping services are not supported on the destination.

 

 

 

4

Which network support services team identifies whether the client site has existing network hardware and circuits installed?

 

customer service

 

help desk

 

network operations

 

planning and provisioning

 

 

 

5

What interconnects the Internet backbone?

 

MDFs

 

IXPs

 

POPs

 

satellite dishes

 

 

 

6

Which ISP network support systems team will typically contact the customer once a new circuit is ready and guide the customer in setting up passwords and other account information?

 

help desk

 

customer service

 

network operations center

 

on-site installation team

 

planning and provisioning

 

 

 

7

What feature enables network devices to be scalable?

 

a fixed number of interfaces

 

ease of repair

 

modularity

 

low maintenance requirements

 

low cost

 

 

 

8

At which point do individuals and small businesses connect directly to the ISP network to obtain Internet access?

 

at a POP

 

at an IXP

 

at a Metro Ethernet link

 

on the ISP extranet

 

 

 

9

What are three main types of high-bandwidth connection options used by medium- to large-sized businesses? (Choose three.)

 

DSL

 

cable modem

 

Ethernet

 

metro Ethernet

 

T1

 

T3

 

 

 

10

What is the purpose of an RFC?

 

to provide the connection point for multiple ISPs to the Internet

 

to document the development and approval of an Internet standard

 

to indicate a contract that a customer signs when purchasing co-location services

 

to document agreements between an ISP and the customer

 

 

 

11

When does a host device issue an ICMP echo request?

 

to initiate a ping to determine if a destination address is reachable

 

to respond to a DNS name query

 

to broadcast its identity to its locally connected neighbors

 

to request the MAC address of a destination IP address

 

 

 

12

Which network support services team is responsible for testing a new customer connection and for monitoring the ongoing operation of the link?

 

customer service

 

help desk

 

network operations

 

on-site installation

 

 

 

13

Which two things can be determined by using the ping command? (Choose two.)

 

the number of routers between the source and destination device

 

the IP address of the router nearest the destination device

 

the average time it takes a packet to reach the destination and for the response to return to the source

 

whether or not the destination device is reachable through the network

 

the average time it takes each router in the path between source and destination to respond

 

 

 

14

The IT manager of a medium-sized business wishes to house the company-owned web servers in a facility that offers round-the-clock controlled access, redundant power, and high-bandwidth Internet access. Which ISP service will fulfill this need?

 

web hosting

 

planning and provisioning

 

application hosting

 

equipment collocation

 

Tier 1 ISP services

 

 

 

15

What was the original purpose of the Internet?

 

voice communication

 

marketing

 

research

 

commerce

 

16

 

 

Refer to the exhibit. Host A cannot connect to the web server at 192.168.100.2. Based on the output of the tracert command, which device is most likely causing the problem?

 

Router A

 

Router B

 

Router C

 

Router D

 

Router E

 

Router F

 

 

 

17

What units are used to measure Internet bandwidth?

 

bits per second

 

bytes per second

 

hertz

 

megabytes per second

 

packets per second

 

 

 

18

What is the maximum T1 transmission speed?

 

56 kbps

 

128 kbps

 

1.544 Mbps

 

2.4 Mbps

 

 

 

19

What three support service teams are commonly found within an ISP? (Choose three.)

 

help desk

 

computer support

 

application readiness

 

network operations center

 

planning and provisioning

 

implementation and documentation

 

 

 

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1

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?

2

ccna_2_powerpuf.jpg

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.

 

3

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

 

4

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?

 

5

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?

6

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

 

7

Which three command line utilities are most commonly used to troubleshoot issues at Layer 3? (Choose three.)

ping

a packet sniffer

Telnet

ipconfig

traceroute

 

 

8

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.

9

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

10

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

11

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

 

12

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

13

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.

 

14

What are two primary goals of the ISP help desk? (Choose two.)

conserving support resources

network optimization

competitive scalability

customer retention

 

15

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

16

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.

 

17

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

 

18

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.

19

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

 

20

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

 

I'm sorry for image files....

I want you guys 2 answer Qs

Thanks~

Edited by qprhvms
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