CCNA: Cisco Certified Network Associate — Question 747

Two switches have been implemented and all interfaces are at the default configuration level. A trunk link must be implemented between two switches with these requirements:

• using an industry-standard trunking protocol
• permitting VLANs 1-10 and denying other VLANs

How must the interconnecting ports be configured?

Answer options

• A. switchport mode dynamic channel-protocol lacp switchport trunk allowed vlans 1-10
• B. switchport mode trunk switchport trunk allowed vlans 1-10 switchport trunk native vlan 11
• C. switchport mode trunk switchport trunk encapsulation dot1q switchport trunk allowed vlans 1-10
• D. switchport mode dynamic desirable channel-group 1 mode desirable switchport trunk encapsulation isl switchport trunk allowed vlan except 11-4094

Correct answer: C

Explanation

The correct answer is C because it specifies 'switchport mode trunk' along with 'switchport trunk encapsulation dot1q', which is the industry-standard protocol required. Options A and D do not use the correct encapsulation method, and option B does not specify the encapsulation type, making C the only option that fulfills all requirements.