Modes of Switch port

Administrative mode: 

• This Switch Port mode is configured by the admin.
• Types of Administrative mode: 
  • Static Access – (no negotiation of the trunk)
  • Static Trunk – (forces formation of the trunk)
  • Dynamic Desirable – (initiates negotiation of the trunk)
  • Dynamic Auto – (wait for the negotiation of the trunk)

Operational Mode: 

• This is the resulting mode of the Switch Port after the negotiation (the result of the configuration done by the admin).
• Types of Operational mode:

Access Mode – If the port is in access mode then the port can carry only one VLAN data. It is only configured on the ports connected to the end users.

switch(config)#int <interface_id>
switch(config-if)#Switch Port mode access

Trunk Mode -If the port is in Trunk mode then the port can carry multiple VLAN data using the Layer 2 encapsulation protocol (either Dot1Q or ISL).

switch(config)#int <interface_id>
switch(config-if)#Switch Port mode trunk

VLAN stands for Virtual Local Area Network. It is a 12-bit identity used to create multiple broadcast domains in a switch. VLAN ranges from 0 to 4095 (VLAN 0 and VLAN 4095 are reserved and not used).