CCNA II Discovery 4.1 Chapter 9
(53).webp "CCNA II Discovery 4.1 Chapter 9 - Quiz")
- 1.
How many usable host addresses does the 192.168.1.0/25 subnet provide?
- A.
254
- B.
128
- C.
127
- D.
126
- E.
64
- F.
62
Correct Answer
D. 126Explanation
The subnet 192.168.1.0/25 has a subnet mask of 255.255.255.128, which means it has 128 total addresses. However, the first and last addresses are reserved for the network and broadcast addresses respectively, leaving 126 usable host addresses.Rate this question:
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- 2.
A network technician has isolated a problem at the transport layer of the OSI model. Which question would provide further information about the problem?
- A.
Do you have a firewall that is configured on your PC?
- B.
Do you have a link light on your network card?
- C.
Is your PC configured to obtain addressing information using DHCP?
- D.
What default gateway address is configured in your TCP/IP settings?
- E.
Can you ping http://www.cisco.com?
Correct Answer
A. Do you have a firewall that is configured on your PC?Explanation
This question would provide further information about the problem because a firewall can block or restrict network traffic at the transport layer. If a firewall is configured on the PC, it could be causing the issue by blocking the necessary transport layer protocols or ports. By asking this question, the network technician can determine if the firewall needs to be adjusted or disabled to resolve the problem.Rate this question:
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- 3.
Refer to the exhibit. A network administrator is in the process of sending a preconfigured text file to a router. When the administrator pastes the configuration into the router, an error message appears. What is the problem with the IP addressing scheme?
- A.
Serial0/0 is configured with a network address.
- B.
The IP address on FastEthernet0/0 overlaps with the IP on FastEthernet0/1
- C.
Serial0/1 is configured with broadcast address.
- D.
The IP address on FastEthernet0/0 overlaps with the IP on Serial0/1
Correct Answer
D. The IP address on FastEthernet0/0 overlaps with the IP on Serial0/1Explanation
The problem with the IP addressing scheme is that the IP address on FastEthernet0/0 overlaps with the IP address on Serial0/1. This means that both interfaces have been assigned the same IP address, which can cause conflicts and communication issues within the network.Rate this question:
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- 4.
A user can access any web page on the Internet but cannot access e-mail. What troubleshooting method would be most efficient for troubleshooting this issue?
- A.
Top-down
- B.
Bottom-up
- C.
Divide-and-conquer
- D.
Impossible to determine from this information
Correct Answer
A. Top-downExplanation
The top-down troubleshooting method would be the most efficient for troubleshooting this issue because it involves starting at the highest level and working down to identify the problem. In this case, the user can access web pages but not email, so starting at the highest level (the internet) and working down to the specific email service can help identify where the issue lies. This method allows for a systematic approach to troubleshooting and helps narrow down the possible causes of the problem.Rate this question:
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- 5.
Refer to the exhibit. What are two possible causes for the interface status? (Choose two.)
- A.
The loopback address is not set.
- B.
The encapsulation type is mismatched.
- C.
A cable is not attached to the interface.
- D.
Keepalive messages are not being received.
- E.
The interface is administratively shut down.
Correct Answer(s)
B. The encapsulation type is mismatched.
D. Keepalive messages are not being received.Explanation
Two possible causes for the interface status are the encapsulation type being mismatched and keepalive messages not being received.Rate this question:
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- 6.
Refer to the exhibit. Host H1 on the LAN is not able to access the FTP server across the Internet. Which two configuration statements are causing this problem? (Choose two.)
- A.
There is no route to the internet.
- B.
The IP address on Fa0/0 is incorrect.
- C.
The IP address on S0/0/0 is incorrect.
- D.
The NAT command on the Fa0/0 interface is applied in the wrong direction.
- E.
The NAT command on the S0/0/0 interface is applied in the wrong direction.
Correct Answer(s)
D. The NAT command on the Fa0/0 interface is applied in the wrong direction.
E. The NAT command on the S0/0/0 interface is applied in the wrong direction.Explanation
The NAT command on the Fa0/0 interface is applied in the wrong direction, which means that the NAT translation is not being performed correctly for outgoing traffic from the LAN. Similarly, the NAT command on the S0/0/0 interface is also applied in the wrong direction, resulting in incorrect NAT translation for incoming traffic from the Internet. These misconfigurations prevent the host H1 from accessing the FTP server across the Internet.Rate this question:
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- 7.
Which two conditions identify issues that are confined to Layer 1? (Choose two.)
- A.
Cables that exceed maximum length
- B.
Encapsulation errors
- C.
Viruses and worms that create excessive broadcast traffic
- D.
Poor termination of cables
- E.
Receiving "line protocol down" messages on the router console
Correct Answer(s)
A. Cables that exceed maximum length
D. Poor termination of cablesExplanation
The two conditions that identify issues confined to Layer 1 are cables that exceed the maximum length and poor termination of cables. Cables that exceed the maximum length can cause signal degradation and loss, resulting in connectivity issues. Poor termination of cables refers to improper connections or damaged connectors, which can also lead to signal loss and connectivity problems at Layer 1.Rate this question:
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- 8.
A network administrator is upgrading a Cisco 1841 router by adding a WIC-2T module card. Which show command can the administrator use to verify that the module is correctly recognized by the router?
- A.
Show flash:
- B.
Show version
- C.
Show ip route
- D.
Show startup-configuration
Correct Answer
B. Show versionExplanation
The "show version" command can be used to verify that the WIC-2T module is correctly recognized by the router. This command provides detailed information about the hardware installed in the router, including any added modules. By running this command, the network administrator can confirm whether the module is properly recognized and functioning as expected.Rate this question:
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- 9.
Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)
- A.
Ping
- B.
Show arp
- C.
Traceroute
- D.
Show ip route
- E.
Show controllers
- F.
Show cdp neighbor
Correct Answer(s)
A. Ping
C. Traceroute
D. Show ip routeExplanation
The three commands that can be used to troubleshoot Layer 3 connectivity issues are ping, traceroute, and show ip route.
- The ping command is used to test if a host is reachable by sending ICMP echo request packets and waiting for ICMP echo reply packets. It helps determine if there is a network connectivity issue between two hosts.
- The traceroute command is used to trace the route that packets take from the source host to the destination host. It helps identify the routers or hops that the packets traverse and can pinpoint where the connectivity issue may be occurring.
- The show ip route command is used to display the routing table of a device. It helps identify if there is a missing route that is preventing communication between hosts on different subnets.Rate this question:
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- 10.
Refer to the exhibit. Which statement is true regarding the IP address configuration?
- A.
Interfaces Fa0/0 and Fa0/1 can be in the same subnet.
- B.
Interface Fa0/0 and NetworkA can be in the same subnet.
- C.
Interface Fa0/0 and NetworkB can be in the same subnet.
- D.
Interface Fa0/1 and NetworkB can be in the same subnet.
Correct Answer
C. Interface Fa0/0 and NetworkB can be in the same subnet. -
- 11.
A network administrator plugs a new PC into a switch port. The LED for that port changes to solid green. What statement best describes the current status of the port?
- A.
There is a duplex mismatch error
- B.
There is a link fault error. This port is unable to forward frames.
- C.
The port is operational and ready to transmit packets
- D.
This port has been disabled by management and is unable to forward frames.
- E.
The flash memory is busy
Correct Answer
C. The port is operational and ready to transmit packetsExplanation
The LED changing to solid green indicates that the port is operational and ready to transmit packets.Rate this question:
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- 12.
Refer to the exhibit. Which three statements are true about the output of the show ip interface brief command? (Choose three.)
- A.
FastEthernet0/0 is functioning correctly
- B.
The shutdown command has been applied on Serial0/0
- C.
FastEthernet0/0 was configured by the startup-config at bootup.
- D.
Serial0/0 is experiencing a Layer 1 network problem.
- E.
FastEthernet0/1 is experiencing a Layer 2 network problem
- F.
Because the port is down, Serial0/1 has an IP address that does not show in the output.
Correct Answer(s)
A. FastEthernet0/0 is functioning correctly
B. The shutdown command has been applied on Serial0/0
E. FastEthernet0/1 is experiencing a Layer 2 network problemExplanation
The output of the "show ip interface brief" command indicates the status and configuration of the network interfaces on a device. From the given options, the statement "FastEthernet0/0 is functioning correctly" is true because the interface is shown as "up" in the output. The statement "The shutdown command has been applied on Serial0/0" is also true because the interface is shown as "administratively down" in the output. Lastly, the statement "FastEthernet0/1 is experiencing a Layer 2 network problem" is true because the interface is shown as "down" in the output, indicating a connectivity issue at Layer 2.Rate this question:
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- 13.
Refer to the exhibit. Users on the 10.12.10.0/24 network are unable to access anyone on the 10.10.10.0/24 network. What two problems exist in the network? (Choose two.)
- A.
R2 is using a different version of RIP
- B.
R2 has a missing network statement
- C.
R1 has an incorrect network statement
- D.
R3 has an incorrect network statement
- E.
A routing loop is occurring between all three routers.
Correct Answer(s)
A. R2 is using a different version of RIP
B. R2 has a missing network statementExplanation
The first problem is that R2 is using a different version of RIP, which means that it is not able to properly communicate and exchange routing information with the other routers in the network. This results in a lack of connectivity between the 10.12.10.0/24 and 10.10.10.0/24 networks. The second problem is that R2 has a missing network statement, which means that it is not advertising the 10.10.10.0/24 network to the other routers. This further contributes to the lack of connectivity between the two networks.Rate this question:
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- 14.
Refer to the exhibit. The PC is trying to ping router B at 192.168.2.2, but it fails. What is the problem?
- A.
The PC is on the wrong subnet
- B.
The default gateway on the PC should be 192.168.1.1
- C.
The default gateway should be 192.168.2.2
- D.
The DNS server is incorrect
- E.
The IP address for Fa0/0 on router A is incorrect
Correct Answer
B. The default gateway on the PC should be 192.168.1.1Explanation
The PC is unable to ping router B because it is on the wrong subnet. The default gateway on the PC should be set to 192.168.1.1 in order to communicate with devices on the same subnet.Rate this question:
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- 15.
An administrator is creating a lab to simulate a WAN connection. During the setup, the administrator notices that there are different encapsulation types on each end of the serial connection. At what layer of the OSI model is this problem occurring?
- A.
Layer 2
- B.
Layer 4
- C.
Layer 5
- D.
Layer 6
Correct Answer
A. Layer 2Explanation
This problem is occurring at Layer 2 of the OSI model. Layer 2 is the Data Link layer, which is responsible for the encapsulation and de-encapsulation of data packets into frames. Different encapsulation types on each end of the serial connection indicate a mismatch in the way the data is being formatted and packaged for transmission. This can cause communication issues between the devices connected to the WAN.Rate this question:
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- 16.
Refer to the exhibit. A router initially boots up to ROMMON mode. The administrator enters the dir flash: command and sees the output that is shown. What should the administrator do next?
- A.
Load a new IOS onto the router by the use of TFTP
- B.
Load a new IOS onto the router via XMODEM
- C.
Boot the router using the reset command in ROMMON
- D.
Erase the file flash and reboot the router
Correct Answer
C. Boot the router using the reset command in ROMMONExplanation
The administrator should boot the router using the reset command in ROMMON. This will restart the router and allow it to boot up normally.Rate this question:
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- 17.
A PC is able to reach devices that are located both inside and outside the network. However, when trying to reach an FTP server that is located on the same subnet, the PC fails to make a connection. The administrator has several other PCs that are located in the same subnet try a connection to the FTP server and they are successful. Which troubleshooting tool can be used to determine the problem between the PC and the FTP server?
- A.
Cable tester
- B.
Digital multimeter
- C.
Protocol analyzer
- D.
Network analyzer
Correct Answer
C. Protocol analyzerExplanation
A protocol analyzer can be used to determine the problem between the PC and the FTP server. It allows the administrator to capture and analyze network traffic, including the communication between the PC and the FTP server. By examining the captured packets, the administrator can identify any issues or errors that may be preventing the PC from making a connection to the FTP server. This tool can help troubleshoot and diagnose network connectivity problems at the protocol level.Rate this question:
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- 18.
Refer to the exhibit. Which IP address is misconfigured and is causing connectivity problems between hosts and servers?
- A.
HostA
- B.
HostB
- C.
Server1
- D.
Server2
- E.
R1 Fa0/0
- F.
R1 Fa0/1
Correct Answer
D. Server2 -
- 19.
Which problem is associated with Layer 4 of the OSI model?
- A.
A firewall is blocking Telnet packets to a host
- B.
A host has an incorrect IP address
- C.
A router has no route to a host
- D.
A host sent a malformed HTTP request
Correct Answer
A. A firewall is blocking Telnet packets to a hostExplanation
Layer 4 of the OSI model is the Transport layer, which is responsible for establishing connections and ensuring reliable data transfer between end systems. A firewall blocking Telnet packets to a host would occur at this layer, as the firewall is inspecting the transport layer protocols (such as TCP or UDP) to determine whether to allow or block the packets. This issue is specific to the transport layer and does not involve incorrect IP addresses, routing problems, or malformed HTTP requests, which would occur at different layers of the OSI model.Rate this question:
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- 20.
A user is having trouble accessing the Internet. A network administrator begins by verifying that the IP address of the PC is correctly configured. Next the administrator pings the default gateway. Based on this information, what type of troubleshooting method is the administrator employing?
- A.
Top-down
- B.
Bottom-up
- C.
Divide-and-conquer
- D.
Impossible to determine from this information
Correct Answer
C. Divide-and-conquerExplanation
The network administrator is employing the divide-and-conquer troubleshooting method. This method involves breaking down a problem into smaller, more manageable parts in order to identify and solve the issue. By first verifying the IP address configuration and then pinging the default gateway, the administrator is systematically narrowing down the possible causes of the Internet access problem.Rate this question:
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