CISCO CCNA Certifications

3 Switch port fa0/1 was manually configured as a trunk, but now it will be used to connect a host to the network. How should the network administrator reconfigure switch port fa0/1?
Remove the multiple VLANs that the port carried in global configuration mode.
Enter the switchport nonegotiate command in interface configuration mode.
Administratively shut down and re-enable the interface to return it to default.
Enter the no switchport mode trunk command in interface configuration mode.
Disable DTP.
Enter the switchport mode access command in interface configuration mode.

4. Refer to the exhibit. The two switches that are shown will not form a trunk. What is the most likely cause of this problem?
The native VLANs are improperly configured.
All the hosts are on the same VLAN and a trunk is not needed.
Both ports are set to dynamic auto.
The trunk should be configured using the switchport mode access command.

5. A network administrator is removing several VLANs from a switch. When the administrator enters the no vlan 1 command, an error is received. Why did this command generate an error?
VLANs can only be deleted by the user who created them.
VLAN 1 can not be deleted until another VLAN has been assigned its responsibilities.
The command was not entered properly, which caused a syntax error to occur.
VLAN 1 can not be deleted until all ports have been removed from it.
VLAN 1 is the management VLAN by default and can not be deleted.

6. Refer to the exhibit. Interface Fa0/1 on switch SW1 is configured in trunk mode. Which statement is true about the trunk link between the switches SW1 and SW2?
Interface Fa0/2 on switch SW2 will negotiate to become a trunk link if it supports DTP.
Interface Fa0/1 converts the neighboring link on the adjacent switch into a trunk link automatically with no consideration of the
configuration on the neighboring interface.
Interface Fa0/1 converts the neighboring link on the adjacent switch into a trunk link if the neighboring interface is configured in
nonegotiate mode.
Interface Fa0/2 on switch SW2 can only become a trunk link if statically configured in that mode.

7 Which two statements are true regarding VLANs? (Choose two.)
VLAN 1 can be deleted or renamed.
Catalyst switches can support up to 255 VLANs.
VLAN information for a VLAN numbered 4000 would be stored in flash.
Switches use CDP advertisements on VLAN 1 to detect neighboring device information.
Extended VLANs allow multiple VLAN memberships to be assigned to a single port simultaneously.

8. Refer to the exhibit. Host B is on the same VLAN as Host D, but they are unable to communicate. What is the most likely cause of this
problem?
The link between the switches is up but not trunked.
VLAN filtering is not allowing VLAN 3 to enter the trunk between the switches.
The router is not properly configured to route traffic between the VLANs.
Host D does not have a proper address for the VLAN 3 address space.

9. What are three characteristics of VLAN1 in a default switch configuration? (Choose three.)
CDP messages are only sent on VLAN1.
VLAN1 is reserved for links between switches.
All switch ports are members of VLAN1.
VLAN1 must be created before ports can be assigned to it.
Only switch port 0/1 is assigned to VLAN1.
An IP address configured on the switch will only apply to ports on VLAN1.

10. Refer to the exhibit. Which two conclusions can be drawn regarding the switch that produced the output shown? (Choose two.)
The network administrator configured VLANs 1002-1005.
The VLANs are in the active state and are in the process of negotiating configuration parameters.
A FDDI trunk has been configured on this switch.
The command switchport access vlan 20 was entered in interface configuration mode for Fast Ethernet interface 0/1.
Devices attached to ports fa0/5 through fa0/8 cannot communicate with devices attached to ports fa0/9 through fa0/12 without the

11. Refer to the exhibit. The network administrator has added the configuration shown to a Catalyst switch without receiving any error or
information messages from the switch. What statement is true regarding Fast Ethernet port 0/2?
Data from multiple VLANs travels on interface Fast Ethernet 0/2.
No data can travel on interface Fast Ethernet 0/2 until the network administrator assigns it an IP address in the range of VLAN2.
For Host A to be able to communicate with Host B and Host C, VLAN3 and VLAN4 must also be configured on interface Fast
Ethernet 0/2.
The network administrator has already entered the command vlan 2 in global configuration mode.
The network administrator has already named VLAN2.

12. By default, to which VLAN does a trunked link belong?
the first VLAN defined
the last VLAN defined
all VLANs
the lowest number VLAN

Enter the no vlan 2 and the vlan 3 commands in global configuration mode.
Enter the no switchport access vlan 2 command in interface configuration mode and then configure the port for VLAN 3.
Enter the switchport access vlan 3 command in interface configuration mode.
Administratively shut down the interface to return it to the default configuration and then configure the port for VLAN 3.

The remote connected interface must be configured as dynamic desirable for the devices to negotiate a trunk.
The native VLAN must be the default VLAN for DTP to negotiate the trunk.
The connected devices dynamically determine when data for multiple VLANs must be transmitted across the link and bring the trunk up as needed.
If the remote connected device is configured with the switchport mode dynamic auto or switchport mode trunk commands, data from multiple VLANs is transmitted over a single connection.

15. Which two statements describe how devices on VLANs communicate? (Choose two.)
Devices on different VLANs communicate through VTP.
Devices on different VLANs communicate through routers.
Data for multiple VLANs is carried over an access link that connects two switches.
Devices on the same VLAN communicate through a router.
Devices on the same VLAN communicate through Layer 2 switches.

16. Refer to the exhibit. How far is a broadcast frame that is sent by host A propagated in the LAN domain?
Only hosts in VLAN10 receive the broadcast frame.
All hosts that are connected to SW1 receive the broadcast frame.
All hosts that are connected to SW2 and SW3 receive the broadcast frame.
All hosts in VLAN 20 and VLAN 30 receive the broadcast frame.
Hosts that are connected to all switches receive the broadcast frame.

17 Which two statements describe the benefits of VLANs? (Choose two.)
VLANs improve network performance by regulating flow control and window size.
VLANs enable switches to route packets to remote networks via VLAN ID filtering.
VLANs reduce network cost by reducing the number of physical ports required on switches.
VLANs improve network security by isolating users that have access to sensitive data and applications.
VLANs divide a network into smaller logical networks, resulting in lower susceptibility to broadcast storms.

18 What port assignment mode should be used on the switch to provide connectivity for traffic coming from voice and data VLANs?
static VLAN port membership, as long as all VLANs are enabled on the port
static VLAN port membership, as long as voice and data VLANs are enabled on the port
voice VLAN port membership, which automatically provides connectivity for both VLANs
dynamic VLAN port membership, which dynamically switches the traffic coming from voice and data VLANs

19. Refer to the exhibit. Host A sends a frame to host B. On which links along the path between hosts A and B will a VLAN ID tag be included
with the frame?
C, E
A, C, E
C, E, F
A, C, D, E
A, B, C, D, E
A, B, C, D, E, F, G

20. What happens to the member ports of a VLAN when the VLAN is deleted?
They become inactive.
They default back to the management VLAN.
They automatically become a part of VLAN1.
They must be assigned to another VLAN before the original VLAN can be deleted.
They remain a part of that VLAN until the switch is rebooted. They then become members of the management VLAN.

21. The network administrator wants to separate hosts in Building A into two VLANs numbered 20 and 30. Which two statements are true concerning VLAN configuration? (Choose two.)
The VLANs may be named.
VLAN information is saved in the startup configuration.
Non-default VLANs created manually must use the extended range VLAN numbers.
The network administrator may create the VLANs in either global configuration mode or VLAN database mode.
Both VLANs may be named BUILDING_A to distinguish them from other VLANs in different geographical locations.

22. Refer to the exhibit. Which statement is true concerning interface Fa0/5?
The default native VLAN is being used.
The trunking mode is set to auto.
Trunking can occur with non-Cisco switches.
VLAN information about the interface encapsulates the Ethernet frames.

23. Refer to the exhibit. Why is Administrative Trunking Encapsulation set to negotiate?
IEEE 802.1q is the sole encapsulation type available on the switch.
This port on the switch does not support Cisco proprietary trunking.
It supports the ability of the switch to use either IEEE 802.1q or ISL encapsulation.
It allows the switch to dynamically determine whether this port is in trunking mode or access mode.

24. Refer to the exhibit. What is the result of the configuration provided?
The traffic between the hosts in the same VLAN is switched properly.
The trunk link is established, but only the traffic on the native VLAN crosses the link.
The trunk link is established, but only the traffic on the regular VLANs crosses the link.
The trunk link is down, and no traffic is able to cross the link.

25 What information does frame tagging add to each frame to allow delivery of frames across a switched trunk?
the destination MAC address
the switch MAC address
the VLAN ID
the BID