📖 What is Switchport Mode Dynamic Desirable?
The DTP mode where the port actively sends DTP frames and attempts to negotiate a trunk link with the neighboring port.
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Sensei Says:
"If you connect a 'dynamic desirable' port to a 'dynamic auto' or 'trunk' port, a trunk link will successfully form."
📚 Certification: Certified Network Associate (200-301)
🔑 What are the Key Concepts of Switchport Mode Dynamic Desirable?
- ▸ Active DTP negotiation state
- ▸ Forms a trunk with Auto, Desirable, or Trunk modes
- ▸ Legacy default state on older Cisco switches
🎯 How does Switchport Mode Dynamic Desirable appear on the 200-301 Exam?
Ensuring a trunk link forms when connecting to a switch whose administrative capability you cannot change, assuming it is set to Dynamic Auto.
Identifying which side of a link initiated the trunk negotiation.
❓ Frequently Asked Questions
What happens when you connect Dynamic Desirable to Dynamic Auto?
A trunk link will successfully form, because the Desirable side actively negotiates it.
Is Dynamic Desirable recommended for edge security?
No, edge ports should be statically set to access mode to prevent an attacker from negotiating a trunk.
Related Terms from Certified Network Associate
Static NAT
Overlay Network
IEEE 802.1Q
Service Set Identifier (SSID)
Internet Protocol version 6 (IPv6) Address
Simple Network Management Protocol (SNMP)