CNA 150 - Module 4 & 5
multilayer switch with routing enabled
A PC is to access a web server on another network. Which inter-VLAN method will provide the highest bandwidth at Layer 3 and also provide a default gateway for the PC? router on a stick multilayer switch with routing enabled trunked interface between the router and the switch multiple physical interfaces on the router, all connected to a Layer 2 switch
to make the Gi0/1 port a routed port
A network administrator enters the following command sequence on a Cisco 3560 switch. What is the purpose of these commands? Switch(config)# interface gigabitethernet 0/1Switch(config-if)# no switchport to shut down the Gi0/1 port to make the Gi0/1 port a routed port to enable the Gi0/1 port as a switch virtual interface to enable the Gi0/1 port as a bridge virtual interface
A router with at least two LAN interfaces should be used.
A small college uses VLAN 10 for the classroom network and VLAN 20 for the office network. What is needed to enable communication between these two VLANs while using legacy inter-VLAN routing? A router with at least two LAN interfaces should be used. Two groups of switches are needed, each with ports that are configured for one VLAN. A router with one VLAN interface is needed to connect to the SVI on a switch. A switch with a port that is configured as trunk is needed to connect to a router.
show ip interface show running-config
An administrator was troubleshooting a router-on-a-stick topology and concluded that the problem was related to the configuration of VLANs on the router subinterfaces. Which two commands can the administrator use in the router to identify the problem? (Choose two.) show controllers show ip interface show ip protocols show running-config show vlan
The MAC address of the switch
By default (without any configuration on a switch), what will determine which switch is the root bridge? The bridge priority The extended system ID The MAC address of the switch The bridge ID
Traffic is routed via internal VLAN interfaces.
How is traffic routed between multiple VLANs on a multilayer switch? Traffic is routed via physical interfaces. Traffic is routed via internal VLAN interfaces. Traffic is broadcast out all physical interfaces. Traffic is routed via subinterfaces.
Every 2 seconds
How often does a switch send a BPDU? Every 2 seconds Every 15 seconds Every 20 seconds Only when there is a change in the topology
The most scalable solution for medium to large organizations.
Layer 3 switch using switched virtual interfaces (SVIs)
A older solution that does not scale well.
Legacy Inter-VLAN routing
Scenario A is a Layer 3 inter-VLAN solution. Scenario B is a legacy inter-VLAN solution. Scenario C is a router-on-a-stick inter-VLAN solution.
Refer to each of the scenario topologies. Which statements best describe the different types of inter-VLAN routing solutions? (Choose all that apply.) Scenario A is a legacy inter-VLAN solution. Scenario B is a Layer 3 inter-VLAN solution. Scenario B and C are both Router-on-a-stick inter-VLAN solutions. Scenario A is a Layer 3 inter-VLAN solution. Scenario B is a legacy inter-VLAN solution. Scenario C is a router-on-a-stick inter-VLAN solution.
An acceptable solution for a small to medium sized network.
Router-on-a-Stick
Root port
The port closest to the root bridge in terms of least overall cost (best path) to the root bridge is the: Designated port Blocked port or non-dedicated port Root port Routed Port
Designated port
The port on the segment (with two switches) that has the lowest path cost to the root bridge is the: Designated port Blocked port or non-dedicated port Root port Routed Port
Lowest bridge ID
The root bridge will be the switch with the: Lowest bridge ID Highest bridge ID Lowest port priority Highest port priority
Root path cost
The sum of individual port costs along the path from the switch to the root bridge is known as the: Least cost path Shortest path cost Best path cost Root path cost
Root bridge
What device is elected by the Spanning Tree Algorithm to which all other switches determine a single least-cost path? Root bridge Dedicated bridge Default gateway Core switch
Multilayer switches are more expensive than router-on-a-stick implementations.
What is a disadvantage of using multilayer switches for inter-VLAN routing? Multilayer switches have higher latency for Layer 3 routing. Multilayer switches are more expensive than router-on-a-stick implementations. Spanning tree must be disabled in order to implement routing on a multilayer switch. Multilayer switches are limited to using trunk links for Layer 3 routing.
does not scale well beyond 50 VLANs
What is a disadvantage of using router-on-a-stick inter-VLAN routing? does not support VLAN-tagged packets requires the use of more physical interfaces than legacy inter-VLAN routing does not scale well beyond 50 VLANs requires the use of multiple router interfaces configured to operate as access links.
a router that is configured with multiple subinterfaces
What is required to perform router-on-a-stick inter-VLAN routing? a Layer 2 switch that is configured with multiple trunk ports a router with multiple physical interfaces a multilayer switch a router that is configured with multiple subinterfaces
the VLAN ID
What is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command? the interface number the subinterface number the subnet number the VLAN ID
trunk
What operational mode should be used on a switch port to connect it to a router for router-on-a-stick inter-VLAN routing? trunk access dynamic auto dynamic desirable
to the subinterface
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 interface to the subinterface to the SVI to the VLAN
Designated port Root port
Which of the following ports will forward Ethernet frames? (Choose two.) Designated port Blocked port or non-dedicated port Root port
routing traffic internally to a Layer 3 switch device
Which scalable method must be implemented in order to provide inter-VLAN routing on a switched network with more than 1000 VLANs? configuring static routes on a Layer 2 switch device routing traffic internally to a Layer 3 switch device connecting each physical router interface to a different physical switch port, with each switch port asigned to a different VLAN connecting a router interface to a switch port that is configured in trunk mode to route packets between VLANs, with each VLAN assigned to a router subinterface.
An SVI is needed for each VLAN.
Which sentence correctly describes the SVI inter-VLAN routing method? Subinterfaces have to be created. The encapsulation type must be configured on the SVI. An SVI is needed for each VLAN. A physical interface is needed for every VLAN that is created.
STP is a Layer 2 loop prevention protocol for Ethernet LANs.
Which statement best describes STP? STP is a Layer 2 routing protocol. STP is a Layer 3 routing protocol for Ethernet LANs. STP is a Layer 2 loop prevention protocol for Ethernet LANs. STP is a Layer 3 loop prevention protocol for IP networks.
router on a stick
Which type of inter-VLAN communication design requires the configuration of multiple subinterfaces? router on a stick routing via a multilayer switch routing for the management VLAN legacy inter-VLAN routing
to create a routed port for a single network
While configuring inter-VLAN routing on a multilayer switch, a network administrator issues the no switchport command on an interface that is connected to another switch. What is the purpose of this command? to create a routed port for a single network to provide a static trunk link to create a switched virtual interface to provide an access link that tags VLAN traffic
Unknown unicast Multicast Broadcast
Without STP on the Ethernet LAN, which three types of frames could cause a catastrophic loop in the network? (Choose three.) Unicast Unknown unicast Multicast Broadcast
show ip route
You are troubleshooting an inter-VLAN issue on a router and need to verify that the subinterfaces are in the routing table. Which inter-VLAN routing troubleshooting command would you use to do this? show interfaces show interfaces interface-id switchport show ip interface brief show ip route show vlan
show ip interface brief
You are troubleshooting an inter-VLAN issue on a router and need to verify the status and IP address of all interfaces in a condensed format. Which inter-VLAN routing troubleshooting command would you use to do this? show interfaces show interfaces interface-id switchport show ip interface brief show ip route show vlan
show interfaces interface-id switchport
You are troubleshooting an inter-VLAN issue on a router and need to verify the status of an access port and its access mode VLAN. Which troubleshooting command would you use to do this? show interfaces show interfaces interface-id switchport show ip interface brief show ip route show vlan
show vlan
You are troubleshooting an inter-VLAN issue on a switch and need to check the list of VLANs and their assigned ports. Which inter-VLAN routing troubleshooting command would you use to do this? show interfaces show interfaces interface-id switchport show ip interface brief show ip route show vlan
