Dest 143 Chapter 1 Quiz Lecture
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- 1.
Which are functions of a router? (Choose three.)
- A.
Packet switching
- B.
Extension of network segments
- C.
Segmentation of broadcast domains
- D.
Selection of best path based on logical addressing
- E.
Selection of best path based on physical addressing
Correct Answer(s)
A. Packet switching
C. Segmentation of broadcast domains
D. Selection of best path based on logical addressingExplanation
A router performs packet switching by receiving packets from one network and forwarding them to another network. It also segments broadcast domains by dividing a network into smaller subnetworks, preventing broadcast traffic from spreading across the entire network. Additionally, a router selects the best path for forwarding packets based on logical addressing, such as IP addresses, to ensure efficient and reliable communication between networks. It does not select the best path based on physical addressing, as that is the function of switches in a network.Rate this question:
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- 2.
A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?
- A.
Router1# copy running-config flash
- B.
Router1(config)# copy running-config flash
- C.
Router1# copy running-config startup-config
- D.
Router1(config)# copy running-config startup-config
- E.
Router1# copy startup-config running-config
- F.
Router1(config)# copy startup-config running-config
Correct Answer
D. Router1(config)# copy running-config startup-configExplanation
The command "Router1(config)# copy running-config startup-config" should be executed to save configuration changes to NVRAM. This command copies the currently running configuration to the startup configuration file, which is stored in NVRAM. This ensures that the new configurations will be saved and loaded automatically the next time the router is powered on.Rate this question:
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- 3.
Refer to the exhibit. The network administrator has configured the router with the interface IP addresses shown for the directly connected networks. Pings from the router to hosts on the connected networks or pings between router interfaces are not working. What is the most likely problem?
- A.
The destination networks do not exist.
- B.
The IP addresses on the router interfaces must be configured as network addresses and not host addresses.
- C.
The interfaces must be enabled with the no shutdown command.
- D.
Each interface must be configured with the clock rate command.
Correct Answer
C. The interfaces must be enabled with the no shutdown command.Explanation
The most likely problem is that the interfaces on the router have not been enabled with the "no shutdown" command. This command is used to activate the interfaces and bring them up so that they can send and receive traffic. Without this command, the interfaces will remain in a shutdown state and will not be able to communicate with the connected networks or other router interfaces.Rate this question:
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- 4.
If a router cannot find a valid configuration file during the startup sequence, what will occur?
- A.
The startup sequence will reset.
- B.
The router will prompt the user for a response to enter setup mode.
- C.
The startup sequence will halt until a valid configuration file is acquired.
- D.
The router will generate a default configuration file based on the last valid configuration.
- E.
The router will monitor local traffic to determine routing protocol configuration requirements.
Correct Answer
B. The router will prompt the user for a response to enter setup mode.Explanation
If a router cannot find a valid configuration file during the startup sequence, it will prompt the user for a response to enter setup mode. This means that the router is unable to load a configuration file and requires user input to set up the necessary configurations.Rate this question:
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- 5.
Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (Choose two.)
- A.
This router only has two interfaces.
- B.
The router interfaces are not operational yet.
- C.
This router is configured to forward packets to remote networks.
- D.
The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP address and the no shutdown command.
- E.
An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface.
Correct Answer(s)
D. The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP address and the no shutdown command.
E. An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface.Explanation
From the routing table output, it can be concluded that the FastEthernet0/0 and Serial0/0/0 interfaces of this router have been configured with an IP address and the "no shutdown" command. This means that these interfaces are operational and ready to forward packets. Additionally, if an IP packet is received by this router with a destination address of 198.18.9.1, it will be forwarded out of the Serial0/0/0 interface.Rate this question:
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- 6.
Refer to the exhibit. The frame shown in the exhibit was received by the router. The router interfaces are operational. How will the router process this frame? (Choose two.)
- A.
The router will change the source and destination IP address in the packet before forwarding the frame.
- B.
The router will change the frame type to one supported by the WAN link before forwarding the frame.
- C.
The router will use the destination MAC address to determine which interface to forward the packet.
- D.
The router will look up the MAC address of the S0/0/0 interface in the ARP table and add it to the frame before forwarding.
- E.
The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0 interface.
- F.
The frame was received on the S0/0/0 interface of the router and will be switched to the Fa0/0 interface.
Correct Answer(s)
B. The router will change the frame type to one supported by the WAN link before forwarding the frame.
E. The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0 interface.Explanation
The router will change the frame type to one supported by the WAN link before forwarding the frame because different types of WAN links require different frame types. The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0 interface because the destination MAC address will be used to determine which interface to forward the packet.Rate this question:
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- 7.
Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)
- A.
VTY interface
- B.
Console interface
- C.
Ethernet interface
- D.
Secret EXEC mode
- E.
Privileged EXEC mode
- F.
Router configuration mode
Correct Answer(s)
A. VTY interface
B. Console interface
E. Privileged EXEC modeExplanation
Passwords can be used to restrict access to the VTY interface, console interface, and privileged EXEC mode. The VTY interface is used for remote access to the device, so setting a password for it ensures that only authorized users can access the device remotely. The console interface is the physical connection to the device, so setting a password for it ensures that only authorized users can access the device locally. Privileged EXEC mode is a higher level of access that allows users to make configuration changes, so setting a password for it ensures that only authorized users can make these changes.Rate this question:
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- 8.
Which two statements correctly describe the components of a router? (Choose two.)
- A.
RAM permanently stores the configuration file used during the boot sequence.
- B.
ROM contains diagnostics executed on hardware modules
- C.
NVRAM stores a backup copy of the IOS used during the boot sequence.
- D.
Flash memory does not lose its contents during a reboot.
- E.
ROM contains the most current and most complete version of the IOS.
- F.
Flash contains boot system commands to identify the location of the IOS
Correct Answer(s)
B. ROM contains diagnostics executed on hardware modules
D. Flash memory does not lose its contents during a reboot.Explanation
The first statement, "ROM contains diagnostics executed on hardware modules," is correct because ROM (Read-Only Memory) in a router contains built-in diagnostics that are executed to check the functionality of hardware modules during the boot sequence.
The fourth statement, "Flash memory does not lose its contents during a reboot," is also correct because Flash memory is non-volatile, meaning it retains its contents even when the router is rebooted or powered off. This makes it an ideal location for storing the IOS (Internetwork Operating System) and other important files.Rate this question:
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- 9.
Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem?
- A.
The subnet mask of host 2 is incorrect.
- B.
Host 1 and host 2 are on different networks.
- C.
The switch needs an IP address that is not configured.
- D.
The router LAN interface and host 1 are on different networks.
- E.
The IP address of host 1 is on a different network than is the LAN interface of the router
Correct Answer
B. Host 1 and host 2 are on different networks.Explanation
The cause of the problem is that host 1 and host 2 are on different networks. This means that they are not in the same IP address range and cannot communicate directly with each other. They would require a router to connect the two networks and facilitate communication between the hosts.Rate this question:
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- 10.
Refer to the exhibit. All routers have a route in its routing table to each network that is shown in the exhibit. Default routes have not been issued on these routers. What can be concluded about how packets are forwarded in this network? (Choose two.)
- A.
If RouterC receives a packet that is destined for 10.5.1.1, it will be forwarded out interface Fa0/0.
- B.
If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out interface S0/0/1,
- C.
If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface S0/0/1.
- D.
If RouterB receives a packet that is destined for 172.20.255.1, it will be forwarded out interface S0/0/0
- E.
If RouterC receives a packet that is destined for 192.16.5.101, it will be forwarded out interface S0/0/1
Correct Answer(s)
B. If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out interface S0/0/1,
C. If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface S0/0/1.Explanation
Based on the given exhibit, RouterA has a route to the network 192.168.3.0/24 through interface S0/0/1. Therefore, if RouterA receives a packet destined for 192.168.3.146, it will forward it out through interface S0/0/1. Similarly, RouterB has a route to the network 10.5.27.0/24 through interface S0/0/1. Therefore, if RouterB receives a packet destined for 10.5.27.15, it will forward it out through interface S0/0/1.Rate this question:
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- 11.
The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.)
- A.
Sydney(config-if)# ip address 201.100.53.2 255.255.255.0
- B.
Sydney(config-if)# no shutdown
- C.
Sydney(config-if)# ip address 201.100.53.1 255.255.255.224
- D.
Sydney(config-if)# clock rate 56000
- E.
Sydney(config-if)# ip host Melbourne 201.100.53.2
Correct Answer(s)
A. Sydney(config-if)# ip address 201.100.53.2 255.255.255.0
B. Sydney(config-if)# no shutdown
D. Sydney(config-if)# clock rate 56000Explanation
The three configuration commands that must be made on the Sydney router to establish connectivity with the Melbourne site are:
1. Sydney(config-if)# ip address 201.100.53.2 255.255.255.0: This command assigns the IP address and subnet mask to the interface connecting to the Melbourne site.
2. Sydney(config-if)# no shutdown: This command enables the interface, allowing it to transmit and receive data.
3. Sydney(config-if)# clock rate 56000: This command sets the clock rate for the serial connection, ensuring proper synchronization with the Melbourne site.Rate this question:
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- 12.
Refer to the exhibit. What can be concluded from the output of the running-configuration of a router?
- A.
The passwords are encrypted.
- B.
The current configuration was saved to NVRAM.
- C.
The configuration that is shown will be the one used on the next reboot.
- D.
The commands that are displayed determine the current operation of the router.
Correct Answer
D. The commands that are displayed determine the current operation of the router.Explanation
The output of the running-configuration of a router shows the commands that are currently being used by the router, which determine its current operation. This means that the displayed configuration represents the settings and parameters that are currently active and being used by the router.Rate this question:
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- 13.
Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet interface, what two pieces of header information are included? (Choose two.)
- A.
Source IP address: 192.168.10.129
- B.
Source IP address: BBBB.3333.5677
- C.
Destination IP address: 192.168.10.33
- D.
Destination IP address: 192.168.10.134
- E.
Destination MAC address: 9999.DADC.1234
Correct Answer(s)
D. Destination IP address: 192.168.10.134
E. Destination MAC address: 9999.DADC.1234Explanation
When R4 accepts the ping into the Ethernet interface, the two pieces of header information included are the destination IP address: 192.168.10.134 and the destination MAC address: 9999.DADC.1234. These pieces of information are necessary for the packet to be correctly routed to the intended destination (host B). The destination IP address identifies the specific device on the network, while the destination MAC address identifies the specific network interface card (NIC) on that device.Rate this question:
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- 14.
What is the outcome of entering these commands?
- A.
R1(config)# line vty 0 4 R1(config-line)# password check123
- B.
R1(config-line)# login
- C.
Ensures that a password is entered before entering user EXEC mode
- D.
Sets the password to be used for connecting to this router via Telnet
- E.
Requires check123 to be entered before the configuration can be saved
- F.
Creates a local user account for logging in to a router or switch
Correct Answer
D. Sets the password to be used for connecting to this router via TelnetExplanation
The given commands "line vty 0 4" and "password check123" are used to configure the virtual terminal lines on the router. The command "line vty 0 4" specifies that the configuration is being done on the virtual terminal lines from 0 to 4. The command "password check123" sets the password for these virtual terminal lines to "check123". This password will be used for connecting to the router via Telnet. Therefore, the correct answer is "sets the password to be used for connecting to this router via Telnet".Rate this question:
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- 15.
Which of the following is the correct flow of routines for a router startup?
- A.
Load bootstrap, load IOS, apply configuration
- B.
Load bootstrap, apply configuration, load IOS
- C.
Load IOS, load bootstrap, apply configuration, check hardware
- D.
Check hardware, apply configuration, load bootstrap, load IOS
Correct Answer
A. Load bootstrap, load IOS, apply configurationExplanation
The correct flow of routines for a router startup is to first load the bootstrap, which initializes the router's hardware and software. Then, the router should load the IOS (Internetwork Operating System), which is the main operating system for the router. Finally, the router should apply the configuration, which includes setting up network parameters and protocols. This sequence ensures that the router is properly initialized and configured before it starts operating.Rate this question:
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- 16.
What three processes does a router execute when it receives a packet from one network that is destined for another network? (Choose three.)
- A.
Decapsulates the Layer 3 packet by stripping off the Layer 2 frame header
- B.
Uses the destination MAC Address in the IP Header to look up the next-hop address in the routing table
- C.
Leaves the Layer 2 frame header intact when decapsulating the Layer 3 packet
- D.
Uses the destination IP Address in the IP header to look up the next-hop address in the routing table
- E.
Encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface
- F.
Encapsulates the Layer 3 packet into a special Layer 1 frame and forwards it to the exit interface
Correct Answer(s)
A. Decapsulates the Layer 3 packet by stripping off the Layer 2 frame header
D. Uses the destination IP Address in the IP header to look up the next-hop address in the routing table
E. Encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interfaceExplanation
When a router receives a packet from one network that is destined for another network, it first decapsulates the Layer 3 packet by stripping off the Layer 2 frame header. Then, it uses the destination IP Address in the IP header to look up the next-hop address in the routing table. After that, it encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface. This process allows the router to properly route the packet to its intended destination network.Rate this question:
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- 17.
What information about the router and its startup process can be gathered from the output of the show version command? (Choose three.)
- A.
The last restart method
- B.
The command buffer contents
- C.
The amount of NVRAM and FLASH used
- D.
The configuration register settings
- E.
The location from where the IOS loaded
Correct Answer(s)
A. The last restart method
D. The configuration register settings
E. The location from where the IOS loadedExplanation
The output of the "show version" command provides information about the router's startup process. It includes details about the last restart method, such as whether it was a power cycle or a software reload. It also displays the configuration register settings, which determine the router's behavior during startup. Additionally, the output shows the location from where the IOS (Internetwork Operating System) loaded, indicating whether it was loaded from NVRAM or FLASH memory.Rate this question:
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- 18.
The network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use?
- A.
Straight-through
- B.
Rollover
- C.
Cross-over
- D.
Serial
Correct Answer
C. Cross-overExplanation
The network administrator should use a cross-over cable to connect two routers directly via their FastEthernet ports. A cross-over cable is used to connect two similar devices, such as two routers or two switches, without the need for a hub or switch in between. It allows for the transmission of data between the devices by crossing over the transmit and receive pins. This is different from a straight-through cable, which is used to connect dissimilar devices, such as a router and a switch. A rollover cable is used to connect a computer to the console port of a router or switch for configuration purposes, while a serial cable is used to connect devices serially.Rate this question:
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- 19.
Which two statements describe characteristics of load balancing? (Choose two.)
- A.
Load balancing occurs when a router sends the same packet to different destination networks.
- B.
Load balancing occurs when a router sends the same packet to different destination networks.
- C.
Load balancing allows a router to forward packets over multiple paths to the same destination network.
- D.
Unequal cost load balancing is supported by EIGRP.
- E.
If multiple paths with different metrics to a destinations exist, the router cannot support load balancing.
Correct Answer(s)
C. Load balancing allows a router to forward packets over multiple paths to the same destination network.
D. Unequal cost load balancing is supported by EIGRP.Explanation
Load balancing is a technique used to distribute network traffic across multiple paths or links to prevent congestion and optimize resource utilization. The first statement correctly describes load balancing by stating that it allows a router to forward packets over multiple paths to the same destination network. This means that the router can distribute the traffic among different paths to improve performance and reliability. The fourth statement is also correct as it states that EIGRP, a routing protocol, supports unequal cost load balancing. This means that the router can distribute traffic over paths with different metrics, taking into account the varying costs of each path.Rate this question:
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- 20.
Which interfaces in the exhibit could be used for a leased line WAN connection? (Choose two.)
- A.
1
- B.
2
- C.
3
- D.
4
- E.
5
- F.
6
Correct Answer(s)
A. 1
D. 4Explanation
Interfaces 1 and 4 could be used for a leased line WAN connection. A leased line is a dedicated point-to-point connection between two locations, typically provided by a telecommunications service provider. Interface 1 and 4 are the only interfaces shown in the exhibit, so they are the only options for a leased line connection.Rate this question:
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- 21.
From what location can a router load the Cisco IOS during the boot process? (Choose two.)
- A.
RAM
- B.
TFTP server
- C.
NVRAM
- D.
Setup routine
- E.
Flash memory
- F.
Terminal
Correct Answer(s)
B. TFTP server
E. Flash memoryExplanation
A router can load the Cisco IOS during the boot process from two locations: TFTP server and Flash memory. The TFTP server is a network server that stores the IOS image and can be accessed by the router over the network. The router can also load the IOS from its internal Flash memory, which is a non-volatile storage location on the router itself. This allows the router to boot up and run the IOS without relying on external sources.Rate this question:
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- 22.
A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?
- A.
Router1# copy running-config flash
- B.
Router1(config)# copy running-config flash
- C.
Router1# copy running-config startup-config
- D.
Router1(config)# copy running-config startup-config
- E.
Router1# copy startup-config running-config
- F.
Router1(config)# copy startup-config running-config
Correct Answer
C. Router1# copy running-config startup-configExplanation
The correct answer is "Router1# copy running-config startup-config". This command is used to save the configuration changes made in the running-config file to the startup-config file in NVRAM. NVRAM is a non-volatile memory that retains the configuration even after a reboot, so saving the changes to NVRAM ensures that the configuration is persistent.Rate this question:
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- 23.
What is the default sequence for loading the configuration file?
- A.
NVRAM, FLASH, ROM
- B.
FLASH, TFTP,CONSOLE
- C.
NVRAM, TFTP, CONSOLE
- D.
FLASH, TFTP, ROM
Correct Answer
C. NVRAM, TFTP, CONSOLEExplanation
The default sequence for loading the configuration file is NVRAM, TFTP, CONSOLE. This means that the router will first check the NVRAM (non-volatile random access memory) for a saved configuration file. If it does not find one, it will then attempt to load the configuration file from a TFTP (Trivial File Transfer Protocol) server. If the TFTP server is not available or the file is not found, the router will prompt the user to enter the configuration manually through the console.Rate this question:
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- 24.
What header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface?
- A.
Only the Layer 2 source address
- B.
Only the Layer 2 destination address
- C.
Only the Layer 3 source address
- D.
Only the Layer 3 destination address
- E.
The Layer 2 source and destination address
- F.
The Layer 3 source and destination address
Correct Answer
E. The Layer 2 source and destination addressExplanation
A router changes the Layer 2 source and destination address in the header address information it receives from an attached Ethernet interface before transmitting the information out another interface. This is because Layer 2 addresses are specific to the local network, and as the router forwards the information to a different network, it needs to update the Layer 2 addresses to ensure proper delivery. The Layer 3 source and destination addresses, on the other hand, remain unchanged as they are used for routing the information across different networks.Rate this question:
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