CMS专题
多选题After properly configuring multiple VLANs， an administrator has decided to secure its VLAN network. Which three steps are required to secure this environment？ （Choose three.）（）AIf a port is connected to a foreign device make sure to disable CDP， DTP， R
题目
If a port is connected to a foreign device make sure to disable CDP， DTP， RPR， PAgP， UDLP， and any other unnecessary protocols， and enable UplinkFast/BPDU guard on it.
Enable root guard feature to prevent a directly or indirectly connected STP-capable device from affecting the location of the root bridge.
Configure VTP domains appropriately or turn off VTP altogether to limit or prevent possible undesirable protocol interaction with regards to the network-wide VLAN configuration.
Set the native VLAN ID to match the port VLAN ID of any 802.1q trunk to prevent spoofing.
Disable all unused ports and place them in an unused VLAN to avoid unauthorized access.
参考答案和解析
相似问题和答案
第1题：
Which spanning tree mode will allow you to put multiple vlans into one instance？
正确答案:MST
第2题：
A hacker on the Company network is attempting to hop onto a different VLAN. Which two statements about VLAN hopping are true？ （）
- A、 An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the 802.1q encapsulation.
- B、 Configuring an interface with the "switchport mode dynamic" command will prevent VLAN hopping.
- C、 Attacks are prevented by utilizing the port-security feature.
- D、 Configuring an interface with the "switchport mode access" command will prevent VLAN hopping.
- E、 An end station attempts to redirect VLAN traffic by broadcasting multiple ARP requests.
正确答案:A,D
第3题：
What are some of the characteristics of a typical VLAN arrangement, found throughout the Ezonexam switched LAN? (Select all that apply)
A. VLANs logically divide a switch into multiple, independent switches at Layer 2.
B. Trunk links can carry traffic for multiple VLANs.
C. VLAN implementation significantly increases traffic due to added trunking information.
D. A VLAN can span multiple switches.
E. VLANs typically increase the number of switches needed
F. VLANs typically decrease the number of switches needed
A,B,D 解析：Explanation:
VLANs give you the power of making virtual LAN networks to subdivide collision domains into smaller units of functionality, without being limited by physical location.
A is correct because that is the exact function of a VLAN. B is correct because trunk links are used to carry traffic for multiple VLANs. D is correct because a VLAN can and often does span across multiple switches. VTP makes this possible.
Incorrect Answers:
C. Although trunking information does indeed add some level of overhead, the overall traffic overhead is greatly reduced though the use of VLANs.
E, F. The number of total switches needed in a network is the result of the number of devices on the entire LAN that need to be connected. Whether VLANs are used or not will have little, if any, impact on the total number of switches needed in a LAN.
第4题：
The Company security administrator wants to prevent VLAN hopping on the network. What is one method that can be used to do this？ （）
- A、 Attacks are prevented by utilizing the port-security feature.
- B、 An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the 802.1q encapsulation.
- C、 Configuring an interface with the switchport mode dynamic command will prevent VLAN hopping.
- D、 An end station attempts to redirect VLAN traffic by transmitting Ethernet frames in the 802.1q encapsulation.
- E、 Configuring an interface with the "switchport mode access" command will prevent VLAN hopping.
正确答案:B,E
第5题：
What are some of the characteristics of a typical VLAN arrangement?（）
- A、VLANs logically divide a switch into multiple, independent switches at Layer 2.
- B、Trunk links can carry traffic for multiple VLANs.
- C、VLAN implementation significantly increases traffic due to added trunking information.
- D、A VLAN can span multiple switches.
- E、VLANs typically increase the number of switches needed
- F、VLANs typically decrease the number of switches needed
正确答案:A,B,D
第6题：
What are some characteristics of the typical VLAN arrangement?（）
- A、VLANs logically divide a switch into multiple, independent switches at Layer 2.
- B、Trunk links can carry traffic for multiple VLANs.
- C、VLAN implementation significantly increases traffic due to added trunking information.
- D、A VLAN can span multiple switches.
- E、VLANs extend the collision domain to include multiple switches.
- F、VLANs typically decrease the number of multiple switches.
正确答案:A,B,D
第7题：
Which three statements are typical characteristics of VLAN arrangements?（）
- A、A new switch has no VLANs configured.
- B、Connectivity between VLANs requires a Layer 3 device.
- C、VLANs typically decrease the number of collision domains.
- D、Each VLAN uses a separate address space.
- E、A switch maintains a separate bridging table for each VLAN.
- F、VLANs cannot span multiple switches.
正确答案:B,D,E
第8题：
A.VTP
B.802.1q
C.IGP
D.ISL
E.802.3u
第9题：
You are planning a new VLAN-based network solution. What is one item you should consider when creating your implementation plan as it concerns VLANs？（）
- A、generic router and switch configuration parameters
- B、end-to-end test plan after all components have been installed and configured
- C、administrator assignments
- D、rollback plan
正确答案:D
第10题：
Which of the following can be an expected outcome of a VLAN?（）
- A、VLANs logically divide a switch into multiple, independent switches at Layer 2.
- B、Trunk links can carry traffic for multiple VLANs.
- C、VLAN implementation significantly increases traffic due to added trunking information.
- D、VLANs can span multiple switches.
- E、VLANs typically decrease the number of switches needed
正确答案:A,B,D