- Exercise on switching and VLAN
Goal: This exercise is to further your understanding of secure switching by studying topics related to Cisco switches and VLAN.
Background information: Figures 4-2 and 4-3 in the text book illustrate how VACLs (VLAN ACLs) are applied to traffic bridged in the VLAN (Figure 4-2) and routed into or out of the VLAN (Figure 4-3). The presented information is not totally clear to the reader, because of lack of background information or possible errors in the description.
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Tasks: Answer the following questions by performing in-depth study of the related topics.
Q1. It appears to be implied that a Cisco switch may operate either in the bridged or routed mode. Verify this. If it is true, describe the mechanisms; if false, justify your answer by citing the source of information.
Q2. In Figure 4-2, two VLANs are shown in that example. However, the textbook description refers to VACL as a mechanism that “filters all types of traffic bridged within a VLAN”. Apparently both cannot be true at the same time. Find out which is true. Justify your answer.
To start, check out these technotes by Cisco:
http://www.cisco.com/en/US/tech/tk389/tk815/technologies_tech_note09186a0080094663.shtml.
Feel free to use any credible sources to complete this exercise. Make sure you cite the sources.