Ccna routing and Switching Complete Study Guide

1.  What is the sys-id-ext field in a BPDU used for?

A.  It is a 4-bit field inserted into an Ethernet frame to define trunking information 

between switches.

B.  It is a 12-bit field inserted into an Ethernet frame to define VLANs in an 

STP instance.

C.  It is a 4-bit field inserted into an non-Ethernet frame to define EtherChannel options.

D.  It is a 12-bit field inserted into an Ethernet frame to define STP root bridges.

2.  You have four RSTP PVST+ links between switches and want to aggregate the bandwidth. 

What solution will you use?