多选题An 802.1Q trunk is not coming up between two switches. The ports on both switches are configured as "switchport mode desirable." Assuming that there is no physical issue，choose two possible causes.（）AIncorrect VTP domainBIncorrect VTP passwordCIncorrec

第1题：

Which configuration option will cause the link between two Cisco 3600 Series Multiservice Platforms to become a functional trunk？（）

• A、switchport dynamic auto switchport dynamic auto
• B、switchport access vlan 10 switchport mode dynamic desireable
• C、switchport mode trunk switchport nonegotiate
• D、Leave both ports with the default trunk settings

第2题：

You are deploying two core switches， one in each building， 50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state， and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？ （）

• A、 The switches are not the same model
• B、 You are not using the correct SFP
• C、 You are not using correct optical media converters
• D、 Configuration should be modified， because the distance is longer

第3题：

Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802.1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the native VLAN is not specified.What will happen in this scenario?（）

• A、802.1Q giants frames could saturate the link.
• B、VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames.
• C、A native VLAN mismatch error message will appear.
• D、VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames.

第4题：

You have a trunk link operating between two switches and you’re experiencing problems withframes leaking between the two VLANs. Each switch has identical modules， software revisionsand VLAN configuration information. Spanning tree protocol is disabled on all VLANs. What isprobably causing this problem？（）

• A、The link is using IEEE 802.1Q protocol
• B、The link is using IEEE 802.1E protocol
• C、Spanning tree is disabled
• D、Not enough information to determine
• E、The native VLAN information is identical at each end of the link
• F、The native VLAN information is different at each end of the link

第5题：

You are deploying two core switches， one in each building， 50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state， and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？（）

• A、The switches are not the same model.
• B、You are not using the correct SFP.
• C、You are not using correct optical media converters.
• D、Configuration should be modified， because the distance is longer.

第6题：

An 802.1Q trunk is not coming up between two switches. The ports on both switches are configured as "switchport mode desirable." Assuming that there is no physical issue， choose two possible causes.（）

• A、Incorrect VTP domain
• B、Incorrect VTP password
• C、Incorrect VTP mode
• D、Incorrect VTP configuration revision

第7题：

A switch port on TK1 is being configured to support 802.1Q trunking.  Which of the following are true about 802.1Q trunking？（）

• A、Both switches must be in the same VTP domain.
• B、The encapsulation type of both ends of the trunk does not have to match.
• C、The native VLAN on both ends of the trunk must be VLAN 1.
• D、802.1Q trunking can only be configured on a Layer 2 port.
• E、In 802.1Q trunking， all VLAN packets are tagged on the trunk link， except the native VLAN.

第8题：

A new switch is being installed and you have been assigned the task of connecting it to an existing switch. In doing this, you want to set up the VLAN Trunking Protocol so that VLAN information can be passed between the switches. Which of the following must you do to accomplish this?（）

• A、You must set each end of the trunk line to IEEE 802.1e encapsulation.
• B、You must set the same VTP management domain name on both switches.
• C、You must set all ports on the two switches as access ports.
• D、You must configure one of the switches as a VTP server.
• E、You must use a rollover cable to connect the two switches.

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第13题：

Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13.An 802.1Q trunk is configured between the two switches.On CAT1，VLAN10 is chosen as native，but on CAT2 the native VLAN is not specified.What will happen in this scenario？（）

• A、802.1Q giants frames could saturate the link.
• B、VLAN10 on CAT1 and VLAN1 on CAT2 will send untagged frames.
• C、A native VLAN mismatch error message will appear.
• D、VLAN10 on CAT1 and VLAN1 on CAT2 will send tagged frames.

第14题：

You need to investigate a VTP problem between two Company switches. The lack of which two  prevents VTP information from propagating between switches？（）

• A、A root VTP server
• B、A trunk port
• C、VTP priority
• D、VLAN 1
• E、None of the other alternatives apply

第15题：

Refer to Topic TestKing.com in iPAD document.What happens to the network when TestKingX is reconnected and a trunk exists between the two switches?（）

• A、All VLANs except the default VLAN will be removed from all switches.
• B、All existing switches will have the students, admin, faculty, Servers, Management,Production, and no-where VLANs.
• C、The VLANs Servers, Management, Production, and no-where will replace the VLANs on SwX.
• D、The VLANs Servers, Management, Production, and no-where will be removed from existing switches.

第16题：

You are configuring an 802.1Q trunk between a Layer 2 switch and a firewall. You read in the documentation that the best way to set up a trunk is to set the port as dynamic desirable. The trunk is not coming up. Which one of these options would be a valid explanation？ （）

• A、The firewall does not support Cisco Discovery Protocol. You should set the switchport trunk mode ON
• B、The firewall does not support Cisco Discovery Protocol. You should set the switchport trunk mode to OFF
• C、The firewall does not support Cisco Discovery Protocol. You should set the switchport trunk mode asauto.
• D、The firewall does not support DTP. You should set the switchport trunk mode to ON

第17题：

Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802. 1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the native VLAN is not specified.What will happen in this scenario？（）

• A、802.1Q giants frames could saturate the link
• B、VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames
• C、A native VLAN mismatch error message will appear
• D、VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames.

第18题：

The network administrator is trying to add Switch1 to the network， but the 802.1Q trunk is not coming up. Switch1 was previously tested in the laboratory and its trunk configuration worked fine. What are three possible causes of this problem？ （）

• A、The trunking configuration mode on Switch1 is set to Off.
• B、The trunking configuration mode on the other end is set to On.
• C、The trunking configuration mode on the other end is set to Desirable.
• D、Cisco Discovery Protocol is not running on the other end.
• E、There is a VTP domain name mismatch.
• F、Switch1 does not support 802.1Q.

第19题：

If you were to configure an ISL Ethernet trunk between two Cisco switches， named R1 and R2，   what would you have to include at the end of the link for the trunk to operate correctly？ （）

• A、 An identical VTP mode.
• B、 An identical speed/duplex.
• C、 An identical trunk negotiation parameter.
• D、 An identical trunk encapsulation parameter.

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