Switchport

[sanjayh23]

What kind of questions would I find on an exam relating to Switchport?

[balaji.bandi]

How can I tell if this port is in trunking mode or has been manually placed into trunking mode and is using the 802.1Q trunking protocol?

-  you can see the interface configured as trunk, administrative mode : Trunk and dot1q

How can I tell if a VoIP phone has a PC attached?

 - This port trun allowed all vlan 1-1001

 -  show mac address or ip arp of that port tell you how many devices are connected.

How can I tell if the port can carry data from multiple VLANs if pruning is disabled or if negotiation has been disabled?

 - show interface trunk show you that details.

[Georg Pauwen]

Hello,

you can get all of this information from the output shown:

How can I tell if this port is in trunking mode or has been manually placed into trunking mode and is using the 802.1Q trunking protocol?

--> Operational Mode: trunk
--> Administrative Trunking Encapsulation: dot1q

How can I tell if a VoIP phone has a PC attached?

--> Voice VLAN: none

How can I tell if the port can carry data from multiple VLANs:

--> Trunking VLANs Enabled: All

if pruning is disabled:

--> Pruning VLANs Enabled: 2-1001

or if negotiation has been disabled:

--> Negotiation of Trunking: On

[paul driver]

Hello

FYI -
Administrative mode = this defines the actual mode the interface has been placed in - switchport mode trunk
Operational mode = this tells you what mode of operation the interface is currently running at
Administrative trunking encapsulation = this tell you DOT1Q encapsulation has been defined on the interface
Operational trunking encapsulation  =  this tells you what encapsulation the interface is currently running at
Negotiation = Dynamic tunnelling protocol (DTP) is enabled < this can be tuned off by switchport nonegotiate
Access Mode VLAN: 1 (default)=  not applicable on trunk mode interfaces only when interface is in access mode
Trunking Native Mode VLAN: 1 (default) = untagged vlan
Voice VLAN: none = not applicable on trunk mode interfaces only when interface is in access mode