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WorksheetsCisco Certified Network Associate (CCNA)
Total questions: 40
Worksheet time: 30mins
Which three statements correctly describe Network Device A? (Choose three.)
With a network wide mask of 255.255.255.128, each interface does not require an IP address.
With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet.
With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other.
With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other.
With a network wide mask of 255.255.254.0, each interface does not require an IP address.
For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)
to uniquely identify devices at Layer 2
to allow communication with devices on a different network
to differentiate a Layer 2 frame from a Layer 3 packet
to establish a priority system to determine which device gets to transmit first
to allow communication between different devices on the same network
A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?
This is a 10 Mb/s switch port.
This is a 100 Mb/s switch port.
This is an Ethernet port operating at half duplex.
This is an Ethernet port operating at full duplex.
This is a port on a network interface card in a PC.
Where does routing occur within the DoD TCP/IP reference model?
application
internet
network
transport
Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?
transport
network
presentation
session
application
Which of the following describes the roles of devices in a WAN? (Choose three.)
A CSU/DSU terminates a digital local loop.
A modem terminates a digital local loop.
A CSU/DSU terminates an analog local loop.
A modem terminates an analog local loop.
A router is commonly considered a DTE device.
Host A pings interface S0/0 on router 3. What is the TTL value for that ping?
252
253
254
255
Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?
the MAC address of router interface e0
the MAC address of router interface e1
the MAC address of the server network interface
the MAC address of host A
A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?
session
transport
network
data link
physical
Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down.
Which of the following are true? (Choose two.)
Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.
Router C will use ICMP to inform Router B that Host 2 cannot be reached.
Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached.
Router C will send a Destination Unreachable message type.
Router C will send a Router Selection message type.
In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)
when they receive a special token
when there is a carrier
when they detect no other devices are sending
when the medium is idle
when the server grants access
What is the difference between a CSU/DSU and a modem?
A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.
A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.
A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.
A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
Which destination addresses will be used by Host A to send data to Host C? (Choose two.)
the IP address of Switch 1
the MAC address of Switch 1
the IP address of Host C
the MAC address of Host C
the MAC address of the router's E0 interface
A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?
application
presentation
session
transport
internet
What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)
The number of collision domains would remain the same.
The number of collision domains would decrease.
The number of collision domains would increase.
The number of broadcast domains would remain the same
The number of broadcast domains would decrease.
Which three statements accurately describe Layer 2 Ethernet switches? (Choose three.)
Spanning Tree Protocol allows switches to automatically share VLAN information.
Establishing VLANs increases the number of broadcast domains.
Switches that are configured with VLANs make forwarding decisions based on both Layer 2 and Layer 3 address information.
Microsegmentation decreases the number of collisions on the network.
In a properly functioning network with redundant switched paths, each switched segment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port.
Based on the information given, which switch will be elected root bridge and why?
Switch A, because it has the lowest MAC address
Switch A, because it is the most centrally located switch
Switch B, because it has the highest MAC address
Switch C, because it is the most centrally located switch
Switch C, because it has the lowest priority
A router has two Fast Ethernet interfaces and needs to connect to four VLANs in the local network. How can you accomplish this task, using the fewest physical interfaces and without decreasing network performance?
Use a hub to connect the four VLANS with a Fast Ethernet interface on the router.
Add a second router to handle the VLAN traffic.
Add two more Fast Ethernet interfaces.
Implement a router-on-a-stick configuration.
What will Router1 do when it receives the data frame shown? (Choose three.)
Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.
Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.
Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.
Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.
Router1 will forward the data packet out interface FastEthernet0/2.
Which of the following statements describe the network shown in the graphic? (Choose two.)
There are two broadcast domains in the network.
There are seven collision domains in the network.
There are four broadcast domains in the network.
There are six broadcast domains in the network.
There are four collision domains in the network.
Which of the following correctly describe steps in the OSI data encapsulation process?
(Choose two.)
The transport layer divides a data stream into segments and may add reliability and flow control information.
The data link layer adds physical source and destination addresses and an FCS to the segment.
Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
The presentation layer translates bits into voltages for transmission across the physical link.
A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN
2. What causes this behavior?
trunk mode mismatches
allowing only VLAN 2 on the destination
native VLAN mismatches
VLANs that do not correspond to a unique IP subnet
Which three of these statements regarding 802.1Q trunking are correct? (Choose three.)
802.1Q native VLAN frames are untagged by default.
802.1Q trunking ports can also be secure ports.
802.1Q trunks can use 10 Mb/s Ethernet interfaces.
802.1Q trunks require full-duplex, point-to-point connectivity.
802.1Q trunks should have native VLANs that are the same at both ends.
All switch ports are assigned to the correct VLANs, but none of the hosts connected to
SwitchA can communicate with hosts in the same VLAN connected to SwitchB. Based on the output shown, what is the most likely problem?
The access link needs to be configured in multiple VLANs.
The link between the switches is configured in the wrong VLAN.
The link between the switches needs to be configured as a trunk.
VTP is not configured to carry VLAN information between the switches.
Switch IP addresses must be configured in order for traffic to be forwarded between the switches.
Which are valid modes for a switch port used as a VLAN trunk? (Choose three.)
transparent
auto
on
desirable
blocking
Which statement about VLAN operation on Cisco Catalyst switches is true?
When a packet is received from an 802.1Q trunk, the VLAN ID can be determined from the source MAC address and the MAC address table.
Unknown unicast frames are retransmitted only to the ports that belong to the same VLAN.
Broadcast and multicast frames are retransmitted to ports that are configured on different VLAN.
Ports between switches should be configured in access mode so that VLANs can span across the ports.
What are the possible trunking modes for a switch port? (Choose three.)
transparent
auto
on
desirable
client
The output that is shown is generated at a switch. Which three statements are true?
(Choose three.)
All ports will be in a state of discarding, learning, or forwarding.
Thirty VLANs have been configured on this switch.
The bridge priority is lower than the default value for spanning tree.
All interfaces that are shown are on shared media.
All designated ports are in a forwarding state.
Switch port FastEthernet 0/24 on ALSwitch1 will be used to create an IEEE 802.1Q- compliant trunk to another switch. Based on the output shown, what is the reason the trunk does not form, even though the proper cabling has been attached?
VLANs have not been created yet.
An IP address must be configured for the port.
The port is currently configured for access mode.
The correct encapsulation type has not been configured.
The “no shutdown” command has not been entered for the port.
Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over Fast Ethernet?
802.3ad
802.1w
802.1D
802.1Q
Given the output shown from this Cisco Catalyst 2950, what is the reason that interface
FastEthernet 0/10 is not the root port for VLAN 2?
This switch has more than one interface connected to the root network segment in VLAN 2.
This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.
This switch interface has a higher path cost to the root bridge than another in the topology.
This switch has a lower bridge ID for VLAN 2 than the elected designated switch.
Which two states are the port states when RSTP has converged? (Choose two.)
discarding
listening
learning
forwarding
disabled
Given this output for SwitchC, what should the network administrator's next action be?
Check the trunk encapsulation mode for SwitchC's fa0/1 port.
Check the duplex mode for SwitchC's fa0/1 port.
Check the duplex mode for SwitchA's fa0/2 port.
Check the trunk encapsulation mode for SwitchA's fa0/2 port.
Which switch would STP choose to become the root bridge in the selection process?
32768: 11-22-33-44-55-66
32768: 22-33-44-55-66-77
32769: 11-22-33-44-55-65
32769: 22-33-44-55-66-78
What parameter can be different on ports within an EtherChannel?
speed
DTP negotiation settings
trunk encapsulation
duplex
Which switch provides the spanning-tree designated port role for the network segment that services the printers?
Switch1
Switch2
Switch3
Switch4
Which two benefits are provided by creating VLANs? (Choose two.)
added security
dedicated bandwidth
provides segmentation
allows switches to route traffic between subinterfaces
contains collisions
Which two statements are true of the interfaces on Switch1? (Choose two.)
Multiple devices are connected directly to FastEthernet0/1.
A hub is connected directly to FastEthernet0/5.
FastEthernet0/1 is connected to a host with multiple network interface cards.
FastEthernet0/5 has statically assigned MAC addresses.
FastEthernet0/1 is configured as a trunk link.
A switch is configured with all ports assigned to VLAN 2 with full duplex FastEthernet to segment existing departmental traffic. What is the effect of adding switch ports to a new
VLAN on the switch?
More collision domains will be created.
IP address utilization will be more efficient.
More bandwidth will be required than was needed previously.
An additional broadcast domain will be created.
Which statement is true?
The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20.
VLAN 20 is running the Per VLAN Spanning Tree Protocol.
The MAC address of the root bridge is 0017.596d.1580.
SwitchA is not the root bridge, because not all of the interface roles are designated.
