- Which type of device can be replaced by the use of subinterfaces for VLAN routing?
- A. Layer 2 bridge
- B. Layer 2 switch
- C. Layer 3 switch*
- D. router
- Which technology can enable multiple VLANs to communicate with one another?
- A. inter-VLAN routing using a Layer 3 switch*
- B. inter-VLAN routing using a Layer 2 switch
- C. intra-VLAN routing using router on a stick
- D. intra-VLAN routing using a Layer 3 switch
- Which configuration can you apply to enable encapsulation on a subinterface?
- A. interface FastEthernet 0/0
encapsulation dot1Q 30
ip address 10.1.1.30 255.255.255.0 - B. interface FastEthernet 0/0.30
ip address 10.1.1.30 255.255.255.0 - C. interface FastEthernet 0/0.30
description subinterface vlan 30 - D. interface FastEthernet 0/0.30
encapsulation dot1Q 30
ip address 10.1.1.30 255.255.255.0*
Show (Hide) Explanation/ReferenceTo enabe encapsulation on a subinterface we have type the “encapsulation” command under that subinterface, not the main interface. An example of configuring encapsulation on subinterface of Fa0/1 is shown below:Router(config)#interface f0/0 Router(config-if)#no shutdown (Note: The main interface f0/0 doesn’t need an IP address but it must be turned on) Router(config)#interface f0/0.0 Router(config-subif)#encapsulation dot1q 10 Router(config-subif)#ip address 192.168.1.1 255.255.255.0 Router(config-subif)#interface f0/0.1 Router(config-subif)#encapsulation dot1q 20 Router(config-subif)#ip address 192.168.2.1 255.255.255.0
Note: In the “encapsulation dot1q 10”, number 10 is the VLAN applied to that subinterface. Or you can understand that the subinterface belongs to that VLAN.
- A. interface FastEthernet 0/0
- Which statement about slow inter VLAN forwarding is true?
- A. The VLAN is experiencing slowness in the point-to-point collisionless connection.
- B. The VLANs are experiencing slowness because multiple devices are connected to the same hub.
- C. The local VLAN is working normally, but traffic to the alternate VLAN is forwarded slower than expected.
- D. The entire VLAN is experiencing slowness.
- E. The VLANs are experiencing slowness due to a duplex mismatch.*
Show (Hide) Explanation/ReferenceThe causes of slow interVLAN are usually duplex mismatch or collision domain issues, user misconfiguration. For more information please read: http://www.cisco.com/c/en/us/support/docs/lan-switching/virtual-lans-vlan-trunking-protocol-vlans-vtp/23637-slow-int-vlan-connect.html#troubleshoot_slow_interv - Which function enables an administrator to route multiple VLANs on a router?
- A. IEEE 802.1X
- B. HSRP
- C. port channel
- D. router on a stick*
- Which statement about a router on a stick is true?
- A. Its date plane router traffic for a single VI AN over two or more switches.
- B. It uses multiple subinterfaces of a single interface to encapsulate traffic for different VLANs on the same subnet.
- C. It requires the native VLAN to be disabled.
- D. It uses multiple subinterfaces of a single interface to encapsulate traffic for different VLANs.*
- Refer to the exhibit:
Which two statements are true about interVLAN routing in the topology that is shown in the exhibit? (Choose two)
- A. Host E and host F use the same IP gateway address.
- B. Routed and Switch2 should be connected via a crossover cable.
- C. Router1 will not play a role in communications between host A and host D.
- D. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces.*
- E. Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit.
- F. The FastEthernet 0/0 interface on Router1 and Switch2 trunk ports must be configured using the same encapsulation type.*
- Which two steps must you perform to enable router-on-stick on a switch?
- A. connect the router to a trunk port*
- B. configure the subinterface number exactly the same as the matching VLAN
- C. configure full duplex
- D. configure an ip route to the vlan destination network
- E. assign the access port to the vlan*
Show (Hide) Explanation/ReferenceThis question only asks about enable router-on-stick on a switch, not a router. We don’t have subinterface on a switch so B is not a correct answer. - The network shown in the diagram is experiencing connectivity problems. Which of the following will correct the problems? (Choose two)
- A. Configure the gateway on Host A as 10.1.1.1.
- B. Configure the gateway on Host B as 10.1.2.254.*
- C. Configure the IP address of Host A as 10.1.2.2.
- D. Configure the IP address of Host B as 10.1.2.2.*
- E. Configure the masks on both hosts to be 255.255.255.224.
- F. Configure the masks on both hosts to be 255.255.255.240.
- Under which circumstance is a router on a stick most appropriate?
- A. When a router have multiple subnets on a single physical link*
- B. When a router have single subnet on multiple physical links
- C. When a router have multiple interface on single physical links
- D. When a router have single interface on multiple physical links
- Which functionality does an SVI provide?
- A. OSI Layer 2 connectivity to switches
- B. remote switch administration
- C. traffic routing for VLANs*
- D. OSI Layer 3 connectivity to switches
- To enable router on a stick on a router subinterface, which two steps must you perform? (Choose two)
- A. configure full duplex and speed
- B. configure a default to route traffic between subinterfaces
- C. configure the subinterface with an IP address*
- D. configure encapsulation dot1q*
- E. configure an ip route to the vlan destination network
CCNA 200-125 Exam: InterVLAN Routing With Answers
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