Appendix A. Answers to the “Do I Know This Already?” Quizzes

Chapter 1

1.

C and E

2.

A

3.

C

If a Cisco switch port has only speed or duplex configured, the interface still uses auto-negotiation Fast Link Pulses (FLP) to negotiate the setting that was not configured. There is no explicit command to disable auto-negotiation.

4.

B and C

Cisco switches disable auto-negotiation after the speed and duplex have been configured. The other switch attempts auto-negotiation and fails. However, the unconfigured switch can detect the speed even without auto-negotiation. By default, 10-Mbps and 100-Mbps ports use half duplex when they are unable to auto-negotiate a duplex setting.

5.

C and D

The half-duplex switch leaves its loopback circuitry enabled, erroneously detecting ...

Get CCIE Routing and Switching Exam Certification Guide, Third Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.