Computer Networking
In session layer, during data transfer, the data stream responsible for the "control" purpose (i.e control of the session layer itself) is

Typed data
Regular Data
Expedited Data
Capability Data

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Computer Networking
When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link?

Only extended VLAN's are allowed by default.
Only configured VLAN's are allowed on the link.
By default, all VLANs are allowed on the trunk.
No VLAN's are allowed, you must configure each VLAN by hand.

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Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To prevent routing loops in networks with redundant paths
To provide a mechanism for network monitoring in switched environments
To prevent switching loops in networks with redundant switched paths
To create collision domains
To manage the VLAN database across multiple switches

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