Assume that you have been told to secure the trunk ports on a switch. Which two options are recommended as best practice? (Choose two.)
Change the native VLAN to something other than VLAN 1.
Make the native VLAN different on both ends.
Tag the native VLAN.
Enable DTP.
Make the native VLAN VLAN 1.
Changing the native VLAN to something other than VLAN 1
Tag the native VLAN.
What must you ensure when configuring two ends of an 802.1Q trunk?
The native VLAN must be tagged.
The native VLAN must be the same.
DTP must be disabled.
DTP modes on both ends must be the same.
The native VLAN must be the same.
By default, which VLAN or VLANs are permitted across a trunk link?
no VLANs
native VLAN
all VLANs
VLAN 0
all VLANs
Which statement describes a router-on-a-stick configuration correctly?
Router on a stick is a term used to describe a router and switch connected using one port configured as a stick interface.
Router on a stick is a type of router configuration in which a single physical interface routes the traffic among a single VLAN on a network.
Router on a stick is a type of router configuration in which a single physical interface routes the traffic among multiple VLANs on a network.
Router on a stick is a term frequently used to describe a setup up that consists of a router and 3 switches that are connected using 3 Ethernet links.
Router on a stick is a type of router configuration in which a single physical interface routes the traffic among multiple VLANs on a network.
Which option involves only a single connection between a router and a switch for the purpose of inter-VLAN routing?
router with a separate interface in each VLAN
Layer 3 switch
router on a stick
multilayer switch
router on a stick
Which feature is critical to correctly implement a router on a stick?
router subinterfaces that are each configured with a dot1q VLAN tag
router subinterfaces that are configured with an ISL trunk.
router interfaces that are tagged with multiple dot1q VLAN tags
router interfaces that are configured to be a trunk
router subinterfaces that are each configured with a dot1q VLAN tag
Which option identifies the STP bridge priority range?
0 to 65535
0 to 32768
1 to 65535
1 to 32768
0 to 65535
What are two PortFast characteristics? (Choose two.)
configured on access ports connected to user device
configured on trunk ports connected to another switch
immediate transition to forwarding state
if BPDU is received, it disables the port
never used in a combination with BPDU guard
configured on access ports connected to user device
immediate transition to forwarding state
Which of these is a STP port state but not a RSTP port state?
forwarding
learning
listening
discarding
listening
For configuring EtherChannel on switch SW3, the administrator is starting the configuration by shutting down a range of interfaces, as shown below. Why is the administrator doing so?
SW3(config)# interface range Ethernet0/2 - 3
SW3(config-if-range)# shutdown
The interfaces must be shut down when they are bundled into EtherChannel.
The interfaces must be shut down to change their speed and duplex.
The shutdown interfaces do not create activity on the link, so incomplete configuration will not produce undesired results.
The interfaces that are not part of the EtherChannel must be shut down.
The shutdown interfaces do not create activity on the link, so incomplete configuration will not produce undesired results.
Which four interface characteristics must match for a link to be included into EtherChannel? (Choose four.)
interface type
switchport mode
interface speed
VLAN
STP role
hostname
interface descriptions
interface type, switchport mode, interface speed, VLAN
How does 802.1Q incorporate VLAN information into a frame?
It adds a 4-byte header and a 26-byte tag to the frame header.
It adds a 4-byte tag to the frame header.
It reroutes the frame through the VLAN interface, causing a different destination address.
It reroutes the frame through the VLAN interface, causing a different source address.
It adds a 4-byte tag to the frame header.
What happens to a port that belongs to VLAN 5 after VLAN 5 is accidentally deleted?
The port goes to the error-disabled state and is not operational.
The port becomes inactive and will not be functional until the missing VLAN 5 is created.
The port remains operational.
The port is shut down.
The port becomes inactive and will not be functional until the missing VLAN 5 is created.
What do VLANs do to improve network performance?
separate large broadcast domains into smaller broadcast domains
create large broadcast domains out of smaller broadcast domains
create one large virtual switch out of many physical switches
allow users to connect over radio frequency
separate large broadcast domains into smaller broadcast domains
Which feature is critical to correctly implement a router on a stick?
router subinterfaces that are each configured with a dot1q VLAN tag
router subinterfaces that are configured with an ISL trunk.
router interfaces that are tagged with multiple dot1q VLAN tags
router interfaces that are configured to be a trunk
router subinterfaces that are each configured with a dot1q VLAN tag
Assume that you have just created a VLAN 10 on a switch. Which command should you use to verify if the VLAN was created?
show virtual lan
show vlan id 100
show vlan brief
show virtual lan id 10
show interface Ethernet0/0 switchport
show vlan brief
Which command enables 802.1Q encapsulation trunking on a router’s Ethernet subinterface Ethernet 0/0.20?
interface e0/0.20
encapsulation 20 dot1q
interface e0/0.20
encapsulation dot1q 20
interface e0/0.20
encapsulation vlan 20 8021q
interface e0/0.20
encapsulation vlan 20 dot1q
interface e0/0.20
encapsulation dot1q 20
Regarding VLANs, which statement is true?
Each VLAN is usually associated with only one IPv4 subnet.
It is recommended to have multiple IPv4 subnets on the same VLAN.
Only native VLAN 1 can have multiple IPv4 subnets on the same VLAN.
There can be multiple IPv4 subnets on the extended VLAN range.
Each VLAN is usually associated with only one IPv4 subnet.
Which risk is posed by operating a switched network with redundant paths?
Layer 2 loops
CRC errors
late collisions
interface input errors
Layer 2 loops
In network design, can you include physical loops between switches?
Yes, to provide redundancy.
No, you should never include physical loops.
Yes, to provide better scalability.
No, you should first disable STP
Yes, to provide redundancy.
Which BID would win election as the root, assuming that the switches with these BIDs were in the same network?
32768:0200.1111.1111
32768:0200.2222.2222
4096:0200.1111.1111
4096:0200.2222.2222
4096:0200.1111.1111
Which option correctly describes the “on” mode regarding EtherChannel?
The EtherChannel will form only if the other side is set to on.
The EtherChannel will form if the other side is set to active.
If the other side is set to negotiate parameters through PAgP, EtherChannel will not form, because PAgP is a proprietary protocol.
If the other side is set to negotiate parameters through LACP, EtherChannel will form, because negotiations with standard protocol will be successful.
The Etherchannel will be successful if the other side is set to passive.
The EtherChannel will form only if the other side is set to on.
An administrator is troubleshooting an EtherChannel link. Which two commands will provide EtherChannel bundled link information and status of each bundled link? (Choose two.)
show etherchannel port-channel
show etherchannel summary
show interface Port-channel
show interfaces status
show spanning-tree
Submit
show etherchannel port-channel
show etherchannel summary
Which statement about the Layer 3 EtherChannel is correct?
A Layer 3 port channel interface behaves like a port on a router.
Layer 3 EtherChannel is established between Layer 2 and Layer 3 switches.
Layer 3 EtherChannel can have Layer 2 member interfaces.
Layer 3 EtherChannel is only used on the links towards service providers.
On Layer 3 EtherChannel, you should disable Spanning Tree Protocol.
A Layer 3 port channel interface behaves like a port on a router.
