You just installed Switch-1 and Switch-2 in your network. Both switches are EX Series switches and are connected to each other using a Layer 2 switch port. Switch-1 must run STP, whereas Switch-2 must run RSTP.
Given the scenario, which statement is true?
A.
The two switches communicate using RSTP.
B.
The two switches will not communicate using STP or RSTP.
C.
The two switches communicate using STP.
D.
The two switches run in dual-mode and communicate using STP and RSTP.
Explanation:
In 2001, the IEEE introduced Rapid Spanning Tree Protocol (RSTP) as 802.1w. RSTP provides significantly faster spanning tree convergence after a topology change, introducing new convergence behaviors and bridge port roles to do this. RSTP was designed to be backwards-compatible with standard STP.While STP can take 30 to 50 seconds to respond to a topology change, RSTP is typically able to respond to changes within 3Hello times (default: 3 times 2 seconds) or within a few milliseconds of a physical link failure. The so-called Hello time is an important and configurable time interval that is used by RSTP for several purposes; its default value is 2 seconds.
Standard IEEE 802.1D-2004 incorporates RSTP and obsoletes the original STP standard.