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Worksheets420-906-LA
Total questions: 40
Worksheet time: 1hrs 20mins
Which switching method describes a switch that transfers a frame as soon as the destination MAC address is read?
Fragment free
Store and Forward
Packet switching
Latency forwarding
None of the above
Which tasks can be accomplished by using the command history feature?
Set the command history buffer size
Recall previously entered commands
Recall up to 15 command lines by default
Save command lines in a log file for future references
View a list of commands entered in a previous session
What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature?
Straight-through
Coaxial
Rollover
Crossover
What advantage does SSH offer over Telnet?
Connection-oriented services
Username and password authentication
More connection lines
Encryption
Which statement is true about broadcast and collision domains?
Adding a switch to a network will increase the size of the broadcast domain
The size of the collision domain can be reduced by adding hubs to a network
The more interfaces a router has the larger the resulting broadcast domain
Adding a router to a network will increase the size of the collision domain
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
Forward the frame out all ports except the port where the frame is received
Use ARP to resolve the port that is related to the frame
Send the frame to the default gateway address
Drop the frame
Which switching method makes use of the FCS value?
Large frame buffer
Broadcast
Cut-through
Store-and-forward
Which type of address does a switch use to build the MAC address table?
Destination MAC
Destination IP
Source IP
Source MAC
Which two statements about Layer 2 Ethernet switches are true?
Layer 2 switches can send traffic based on the destination MAC address
Layer 2 switches have multiple collision domains
Layer 2 switches prevent broadcasts
Layer 2 switches route traffic between different networks
Layer 2 switches decrease the number of broadcast domains
In which memory location are the VLAN configurations of normal range VLANs stored on a Catalyst switch?
ROM
NVRAM
Flash
RAM
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?
Management VLAN ID
Data VLAN ID
Unused VLAN ID
Native VLAN ID
A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?
It allows VLAN 1 to 30 on Fa0/5
It allows only VLAN 30 on Fa0/5
It allows VLAN 10, 20 and 30 on Fa0/5
It allows a native VLAN of 30 to be implemented on Fa0/5
What is the first action in the boot sequence when a switch is powered on?
Load a power-on self-test program
Load the default Cisco IOS software
Load boot loader software
Low-level CPU initialization
Load the configuration file
When configuring a router as part of a router-on-a-stick inter-VLAN routing topology, where should the IP address be assigned?
To the VLAN
To the Interface
To the sub-interface
To the SVI
What is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command?
The interface number
The sub-interface number
The VLAN ID
The subnet number
What operational mode should be used on a switch port to connect it to a router for router-on-a-stick inter-VLAN routing?
Access
Trunk
Dynamic desirable
Dynamic auto
In an Ethernet network, frames smaller than 64 bytes are called (a) ?
What two protocols are supported on Cisco devices for AAA communications?
LLDP
HSRP
VTP
TACACS+
RADIUS
When security is a concern, which OSI Layer is considered to be the weakest link in a network system?
Layer 4
Layer 3
Layer 2
Layer 7
True or False?
In the 802.1X standard, the client attempting to access the network is referred to as the supplicant.
True
False
A network administrator has configured VLAN 99 as the management VLAN and has configured it with an IP address and subnet mask. The administrator issues the show interface vlan 99 command and notices that the line protocol is down. Which action can change the state of the line protocol to up?
Configure a default gateway
Connect a host to an interface associated with VLAN 99
Remove all access ports from VLAN 99
Configure a transport input method on the vty lines
Which two commands can be used to enable PortFast on a switch?
S1(config-if)#enable spanning-tree portfast
S1(config-line)#spanning-tree portfast
S1(config)#spanning-tree portfast default
S1(config)#enable spanning-tree portfast default
S1(config-if)#spanning-tree portfast
Which security feature should be enabled in order to prevent an attacker from overflowing the MAC address table of a switch?
Storm control
BPDU filter
Port security
Root guard
Where are dynamically learned MAC addresses stored when sticky learning is enabled with the switchport port-security mac-address sticky command?
RAM
Flash
ROM
NVRAM
For what reason would a network administrator use the show interfaces trunk command on a switch?
To examine DTP negotiation as it occurs
To verify port association with a particular VLAN
To display an IP address for any existing VLAN
To view the native VLAN
Which method of wireless authentication is currently considered to be the strongest?
WEP
Open
WPA2
WPA
Shared key
Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges?
802.11a
802.11b
802.11n
802.11g
If three 802.11b access points need to be deployed in close proximity, which three frequency channels should be used?
5
6
1
8
11
Which two statements describe the benefits of VLANs?
VLANs divide a network into smaller logical networks, resulting in lower susceptibility to broadcast storms
VLANs improve network security by isolating users that have access to sensitive data and applications
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
Which protocol could be used by a company to monitor devices such as a wireless LAN controller (WLC)?
SSH
PAT
NTP
SNMP
What functionality is required on routers to provide remote workers with VoIP and videoconferencing capabilities?
QOS
VPN
PPoE
IPsec
Users on an IEEE 802.11n network are complaining of slow speeds. The network administrator checks the AP and verifies it is operating properly. What can be done to improve the wireless performance in the network?
Switch to a 802.11g AP
Change the authentication method on the AP
Change the AP to mixed mode
Split the wireless traffic between the 801.11n 2.4 Ghz band and the 5 Ghz band
What is one way to prevent the VLAN hopping attack?
Change the native VLAN to an unused VLAN
Disable DTP negotiation on all ports
Designate a different default VLAN
Remove all user VLANs from the trunk
What is the purpose of the switch command switchport access vlan 99?
To enable port security
To assign the port to a particular VLAN
To make the port operational
To designate the VLAN that does not get tagged
To assign the port to the default native VLAN (VLAN 99)
Which two statements accurately describe DTP?
Cisco switches require DTP to establish trunks
DTP is a Cisco proprietary protocol
DTP supports IEEE 802.1Q
DTP must be enabled on only one side of the trunk link
Trunk ports that are configured for dynamic auto will request to enter the trunking state
A network administrator enters the following command sequence on a Cisco 3560 switch. What is the purpose of these commands?
Switch(config)# interface gigabitethernet 0/1
Switch(config-if)# no switchport
To shut down the Gi0/1 port
To enable the Gi0/1 port as a switch virtual interface
To make the Gi0/1 port a routed port
To enable the Gi0/1 port as a bridge virtual interface
Which configuration must be in place for the auto-MDIX feature to function on a switch interface?
The speed and duplex of the interface must be configured for auto detect
The interface must be in access mode
The interface must be assigned to VLAN 1
The interface must be assigned to VLAN 1
No configuration needed, Denis says simply use the correct cable
What are two ways to make a switch less vulnerable to attacks like MAC address flooding, CDP attacks, and Telnet attacks?
Enable CDP on the switch
Change passwords regularly
Turn off unnecessary services
Enable the HTTP server on the switch
Use the enable password rather than the enable secret password
Which step should be performed first when deleting a VLAN that has member switch ports?
Reassign all VLAN member ports to a different VLAN
Reload the switch
Implement the command delete vlan.dat
Backup the running-config
Nothing. It will go away by itself
An administrator is investigating a failure on a trunk link between a Cisco switch and a switch from another vendor. After a few show commands, the administrator notices that the switches are not negotiating a trunk. What is a probable cause for this issue?
Switches from other vendors do not support DTP
Both switches are in trunk mode
Both switches are in nonegotiate mode
DTP frames are flooding the entire network
None of the above
