CCNA 2 Chapter 6: VLANs (v5.0.3 + v6.0) Exam Answers – 100% Result

Certification Answers
personCertification Answers

Q1. What are three primary benefits of using VLANs? (Choose three.)

  • security
  • a reduction in the number of trunk links
  • cost reduction
  • end user satisfaction
  • improved IT staff efficiency
  • no required configuration
Explanation:  Security, cost reduction, and improved IT staff efficiency are all benefits of using VLANs, along with higher performance, broadcast storm mitigation, and simpler project and application management. End users are not usually aware of VLANs, and VLANs do require configuration. Because VLANs are assigned to access ports, they do not reduce the number of trunk links.
Discussion

Q2. Which type of VLAN is used to designate which traffic is untagged when crossing a trunk port?

  • data
  • default
  • native
  • management
Explanation:  A native VLAN is the VLAN that does not receive a VLAN tag in the IEEE 802.1Q frame header. Cisco best practices recommend the use of an unused VLAN (not a data VLAN, the default VLAN of VLAN 1, or the management VLAN) as the native VLAN whenever possible.
Discussion

Q3. A network administrator is determining the best placement of VLAN trunk links. Which two types of point-to-point connections utilize VLAN trunking? (Choose two.)

  • between two switches that utilize multiple VLANs
  • between a switch and a client PC
  • between a switch and a server that has an 802.1Q NIC
  • between a switch and a network printer
  • between two switches that share a common VLAN
Explanation:  VLAN trunk links are used to allow all VLAN traffic to propagate between devices such as the link between a switch and a server that has an 802.1Q-capable NIC. Switches can also utilize trunk links to routers, servers, and to other switches.
Discussion

Q4. What must the network administrator do to remove Fast Ethernet port fa0/1 from VLAN 2 and assign it to VLAN 3?

  • Enter the no vlan 2 and the vlan 3 commands in global configuration mode.
  • Enter the switchport access vlan 3 command in interface configuration mode.
  • Enter the switchport trunk native vlan 3 command in interface configuration mode.
  • Enter the no shutdown command in interface configuration mode to return it to the default configuration and then configure the port for VLAN 3.
Explanation:  There is no need to enter the no shutdown command or remove VLAN 2 using the no vlan 2 command. The switchport trunk command is not used on an access port.
Discussion

Q5. When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?

  • unused VLAN ID
  • native VLAN ID
  • data VLAN ID
  • management VLAN ID
Explanation:  A native VLAN is used to forward untagged frames that are received on a Cisco switch 802.1Q trunk port. Untagged frames that are received on a trunk port are not forwarded to any other VLAN except the native VLAN.
Discussion

Q6. Port Fa0/11 on a switch is assigned to VLAN 30. If the command no switchport access vlan 30 is entered on the Fa0/11 interface, what will happen?

  • Port Fa0/11 will be shutdown.
  • An error message would be displayed.
  • Port Fa0/11 will be returned to VLAN 1.
  • VLAN 30 will be deleted.
Explanation:  When the no switchport access vlan command is entered, the port is returned to the default VLAN 1. The port will remain active as a member of VLAN 1, and VLAN 30 will still be intact, even if no other ports are associated with it.
Discussion

Q7. Which command is used to remove only VLAN 20 from a switch?

  • delete vlan.dat
  • delete flash:vlan.dat
  • no vlan 20
  • no switchport access vlan 20
Explanation:  The command no vlan vlan-id is used to remove a particular VLAN from a switch. The delete vlan.dat and delete flash:vlan.dat commands will remove all VLANs after reloading the switch.
Discussion

Q8. What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch?

  • The port becomes inactive.
  • The port goes back to the default VLAN.
  • The port automatically associates itself with the native VLAN.
  • The port creates the VLAN again.
Explanation:  If the VLAN that is associated with a port is deleted, the port becomes inactive and cannot communicate with the network any more. To verify that a port is in an inactive state, use the show interfaces switchport command.
Discussion

Q9. Which two characteristics match extended range VLANs? (Choose two.)

  • CDP can be used to learn and store these VLANs.
  • VLAN IDs exist between 1006 to 4094.
  • They are saved in the running-config file by default.
  • VLANs are initialized from flash memory.
  • They are commonly used in small networks.
Explanation:  No answer description available for this question
Discussion

Q10. 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 VLANs 1 to 30 on Fa0/5.
  • It allows VLANs 10, 20, and 30 on Fa0/5.
  • It allows only VLAN 30 on Fa0/5.
  • It allows a native VLAN of 30 to be implemented on Fa0/5.
Explanation:  The switchport trunk allowed vlan 30 command allows traffic that is tagged with VLAN 30 across the trunk port. Any VLAN that is not specified in this command will not be allowed on this trunk port.
Discussion

Q11. Question

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Q12. Question

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Q13. What is a characteristic of legacy inter-VLAN routing?

  • Only one VLAN can be used in the topology.
  • The router requires one Ethernet link for each VLAN.
  • The user VLAN must be the same ID number as the management VLAN.
  • Inter-VLAN routing must be performed on a switch instead of a router.
Explanation:  Multiple VLANs are supported with legacy inter-VLAN routing, but each VLAN requires its own Ethernet router link. Ethernet ports are limited on a router. That is why the router-on-a-stick model evolved. The user VLAN should never be the same number as the management VLAN and using a Layer 3 switch as a router is a modern technique, not a legacy one.
Discussion

Q14. Which four steps are needed to configure a voice VLAN on a switch port? (Choose four).

  • Configure the switch port in access mode.
  • Assign a data VLAN to the switch port.
  • Add a voice VLAN.
  • Assign the voice VLAN to the switch port.
  • Activate spanning-tree PortFast on the interface.
  • Ensure that voice traffic is trusted and tagged with a CoS priority value.
  • Configure the switch port interface with subinterfaces.
  • Configure the interface as an IEEE 802.1Q trunk.
Explanation:  To add an IP phone, the following commands should be added to the switch port: 
SW3(config-vlan)# vlan 150
SW3(config-vlan)# name voice
SW3(config-vlan)# int fa0/20
SW3(config-if)# switchport mode access
SW3(config-if)# mls qos trust cos
SW3(config-if)# switchport access vlan 150
Discussion

Q15. 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
Explanation:  Router-on-a-stick inter-VLAN routing does not scale beyond 50 VLANs. The router can receive VLAN-tagged packets and send VLAN-tagged packets to a destination. Router-on-a-stick inter-VLAN routing can utilize a single router interface as a trunk link to receive and forward VLAN traffic and does not require multiple interfaces.
Discussion

Q16. Question

Explanation:  No answer description available for this question
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Q17. Question

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Q18. 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.
Explanation:  With legacy inter-VLAN routing, different physical router interfaces are connected to different physical switch ports. The switch ports that connect to the router are in access mode, each belonging to a different VLAN. Switches can have ports that are assigned to different VLANs, but communication between VLANs requires routing function from the router.
Discussion

Q19. Question

Explanation:  No answer description available for this question
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Q20. 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
Explanation:  The IP address and the encapsulation type should be assigned to each router subinterface in a router-on-a-stick inter-VLAN topology.
Discussion

Q21. A high school uses VLAN15 for the laboratory network and VLAN30 for the faculty network. What is required to enable communication between these two VLANs while using the router-on-a-stick approach?

  • A multilayer switch is needed.
  • A router with at least two LAN interfaces is needed.
  • Two groups of switches are needed, each with ports that are configured for one VLAN.
  • A switch with a port that is configured as a trunk is needed when connecting to the router.
Explanation:  With router-on-a-stick, inter-VLAN routing is performed by a router with a single router interface that is connected to a switch port configured with trunk mode. Multiple subinterfaces, each configured for a VLAN, can be configured under the single physical router interface. Switches can have ports that are assigned to different VLANs, but communication between those VLANs requires routing function from the router. A multilayer switch is not used in a router-on-a-stick approach to inter-VLAN routing.
Discussion

Q22. Question

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Q23. Question

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Q24. Fill in the blank. Use the full command syntax.

The show vlan command displays the VLAN assignment for all ports as well as the existing VLANs on the switch.
Explanation:  No answer description available for this question
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Q25. Question

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Q26. Question

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Q27. Question

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Q28. Question

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Q29. What are two advantages of static routing over dynamic routing? (Choose two.)

  • Static routing is more secure because it does not advertise over the network.
  • Static routing scales well with expanding networks.
  • Static routing requires very little knowledge of the network for correct implementation.
  • Static routing uses fewer router resources than dynamic routing.
  • Static routing is relatively easy to configure for large networks.
Explanation:  No answer description available for this question
Discussion

Q30. What type of route allows a router to forward packets even though its routing table contains no specific route to the destination network?

  • dynamic route
  • default route
  • destination route
  • generic route
Explanation:  A static default route is a catch-all route for all unmatched networks.
Discussion

Q31. Why would a floating static route be configured with an administrative distance that is higher than the administrative distance of a dynamic routing protocol that is running on the same router?

  • to be used as a backup route
  • to load-balance the traffic
  • to act as a gateway of last resort
  • to be the priority route in the routing table
Explanation:  No answer description available for this question
Discussion

Q32. What is the correct syntax of a floating static route?

  • ip route 209.165.200.228 255.255.255.248 serial 0/0/0
  • ip route 209.165.200.228 255.255.255.248 10.0.0.1 120
  • ip route 0.0.0.0 0.0.0.0 serial 0/0/0
  • ip route 172.16.0.0 255.248.0.0 10.0.0.1
Explanation:  No answer description available for this question
Discussion

Q33. Which type of static route that is configured on a router uses only the exit interface?

  • recursive static route
  • directly connected static route
  • fully specified static route
  • default static route
Explanation:  No answer description available for this question
Discussion

Q34. Question

Explanation:  No answer description available for this question
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Q35. The network administrator configures the router with the ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?

  • C 172.16.1.0 is directly connected, Serial0/0
  • S 172.16.1.0 is directly connected, Serial0/0
  • C 172.16.1.0 [1/0] via 172.16.2.2
  • S 172.16.1.0 [1/0] via 172.16.2.2
Explanation:  The route will appear in the routing with a code of S (Static).
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Q36. Question

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Q37. Question

Explanation:  No answer description available for this question
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Q38. What two pieces of information are needed in a fully specified static route to eliminate recursive lookups? (Choose two.)

  • the interface ID exit interface
  • the interface ID of the next-hop neighbor
  • the IP address of the next-hop neighbor
  • the administrative distance for the destination network
  • the IP address of the exit interface
Explanation:  No answer description available for this question
Discussion

Q39. A network administrator issues the show vlan brief command while troubleshooting a user support ticket. What output will be displayed?

  • the VLAN assignment and membership for all switch ports
  • the VLAN assignment and trunking encapsulation
  • the VLAN assignment and native VLAN
  • the VLAN assignment and membership for device MAC addresses
Explanation:  No answer description available for this question
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Q40. Question

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Q41. Which two statements describe classful IP addresses? (Choose two.)

  • It is possible to determine which class an address belongs to by reading the first bit.
  • The number of bits used to identify the hosts is fixed by the class of the network.
  • Only Class A addresses can be represented by high-order bits 100.
  • Up to 24 bits can make up the host portion of a Class C address.
  • All subnets in a network are the same size.
  • Three of the five classes of addresses are reserved for multicasts and experimental use.
Explanation:  No answer description available for this question
Discussion

Q42. What would be the first step in calculating a summarized route for 5 networks?

  • Starting from the far right, determine the octet in which all the numbers are the same.
  • Determine the network with the lowest number.
  • Write all network numbers in binary.
  • Write all subnet masks in binary.
Explanation:  No answer description available for this question
Discussion

Q43. A company has several networks with the following IP address requirements: 

IP phones – 50
PCs – 70
IP cameras – 10
wireless access points – 10
network printers – 10
network scanners – 2>

Which block of addresses would be the minimum to accommodate all of these devices if each type of device was on its own network?

  • 172.16.0.0/25
  • 172.16.0.0/24
  • 172.16.0.0/23
  • 172.16.0.0/22
Explanation:  No answer description available for this question
Discussion

Q44. Consider the following command: ip route 192.168.10.0 255.255.255.0 10.10.10.2 5 How would an administrator test this configuration?

  • Delete the default gateway route on the router.
  • Ping any valid address on the 192.168.10.0/24 network.
  • Manually shut down the router interface used as a primary route.
  • Ping from the 192.168.10.0 network to the 10.10.10.2 address.
Explanation:  No answer description available for this question
Discussion

Q45. What happens to a static route entry in a routing table when the outgoing interface associated with that route goes into the down state?

  • The static route is removed from the routing table.
  • The router polls neighbors for a replacement route.
  • The static route remains in the table because it was defined as static.
  • The router automatically redirects the static route to use another interface.
Explanation:  No answer description available for this question
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Q46. Question

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Q47. Question

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Q48. What happens to a static route entry in a routing table when the outgoing interface is not available?

  • The route is removed from the table.
  • The router polls neighbors for a replacement route.
  • The route remains in the table because it was defined as static.
  • The router redirects the static route to compensate for the loss of the next hop device.
Explanation:  No answer description available for this question
Discussion

Q49. A company has several networks with the following IP address requirements: 

IP phones – 50
PCs – 70
IP cameras – 10
wireless access points – 10
network printers – 10
network scanners – 2

What does VLSM allow a network administrator to do?

  • utilize one public IP address to translate multiple private addresses
  • utilize multiple different subnet masks in the same IP address space
  • utilize one dynamic routing protocol throughout the entire network
  • utilize multiple routing protocols within an autonomous system
  • utilize one subnet mask throughout a hierarchical network
Explanation:  No answer description available for this question
Discussion

Q50. What would be the best summary route for the following networks? 10.50.168.0/23 10.50.170.0/23 10.50.172.0/23 10.50.174.0/24

  • 10.50.160.0/22
  • 10.50.164.0/23
  • 10.50.168.0/16
  • 10.50.168.0/21
  • 10.50.168.0/22
  • 10.50.168.0/23
Explanation:  No answer description available for this question
Discussion

Q51. What is a valid summary route for IPv6 networks 2001:0DB8:ACAD:4::/64, 2001:0DB8:ACAD:5::/64, 2001:0DB8:ACAD:6::/64, and 2001:0DB8:ACAD:7::/64?

  • 2001:0DB8:ACAD:0000::/63
  • 2001:0DB8:ACAD:0000::/64
  • 2001:0DB8:ACAD:0004::/62
  • 2001:0DB8:ACAD:0004::/63
Explanation:  No answer description available for this question
Discussion

Q52. Which three IOS troubleshooting commands can help to isolate problems with a static route? (Choose three.)

  • show ip route
  • show ip interface brief
  • ping
  • tracert
  • show arp
  • show version
Explanation:  No answer description available for this question
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Q53. Question

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Q54. Question

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Q55. Question

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Q56. Consider the following command: ip route 192.168.10.0 255.255.255.0 10.10.10.2 5 How would an administrator test this configuration?

  • Ping from the 192.168.10.0 network to the 10.10.10.2 address.
  • Ping any valid address on the 192.168.10.0/24 network.
  • Delete the default gateway route on the router.
  • Manually shut down the router interface used as a primary route.
Explanation:  No answer description available for this question
Discussion

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