Which command would you utilize to configure a switch to not negotiate for a trunk link?

Which command would you utilize to configure a switch to not negotiate for a trunk link?

• A. switchport nonegotiate
• B. switchport mode trunk
• C. switchport trunk encapsulation dot1q
• D. switchport access vlan

Answer: (A)

The command to configure a switch to not negotiate for a trunk link is "switchport nonegotiate." This command explicitly instructs the switch not to use Dynamic Trunking Protocol (DTP) to automatically negotiate trunking on a port. This is particularly important in scenarios where you want to ensure that a switch port is set to trunk mode without allowing any automatic negotiation, which can help in maintaining a more secure and predictable network configuration. By using the "switchport nonegotiate" command, you prevent the switch from sending or responding to DTP frames, reducing potential vulnerabilities that come with dynamic negotiation. This is especially useful in environments where you want full control over which links are configured as trunk links, ensuring that only explicitly defined ports are set as trunks. The other options provided play different roles in switch configuration related to trunking. For example, while "switchport mode trunk" configures the port as a trunk, it does not stop DTP negotiation unless combined with the nonegotiate command. The encapsulation command specifies the encapsulation method for the trunk but does not affect negotiation. Lastly, "switchport access vlan" is used for access ports and does not pertain to trunk configuration at all.

The command to configure a switch to not negotiate for a trunk link is "switchport nonegotiate." This command explicitly instructs the switch not to use Dynamic Trunking Protocol (DTP) to automatically negotiate trunking on a port. This is particularly important in scenarios where you want to ensure that a switch port is set to trunk mode without allowing any automatic negotiation, which can help in maintaining a more secure and predictable network configuration.

By using the "switchport nonegotiate" command, you prevent the switch from sending or responding to DTP frames, reducing potential vulnerabilities that come with dynamic negotiation. This is especially useful in environments where you want full control over which links are configured as trunk links, ensuring that only explicitly defined ports are set as trunks.

The other options provided play different roles in switch configuration related to trunking. For example, while "switchport mode trunk" configures the port as a trunk, it does not stop DTP negotiation unless combined with the nonegotiate command. The encapsulation command specifies the encapsulation method for the trunk but does not affect negotiation. Lastly, "switchport access vlan" is used for access ports and does not pertain to trunk configuration at all.