CCIE Practical Studies Labs

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6 to 2 f. 6 to 3 Which of the following denotes the correct usage of pins on the RJ-45 connectors at the opposite ends of an Ethernet straight-through cable? a. 1 to 1 b. 1 to 2 c. 1 to 3 d. 6 to 1 e. 6 to 2 f. 6 to 3 Which of the following commands must be configured on a Cisco IOS switch interface to disable Ethernet auto-negotiation? a. no auto-negotiate b. no auto c. Both speed and duplex d. duplex e. speed Consider an Ethernet cross-over cable between two 10/100 ports on Cisco switches. One switch has been configured for 100-Mbps full duplex.

NOTE Often, when overriding the MAC address to use a local address, the device or device driver does not enforce the setting of the U/L bit to a value of 1. 3 Length Field Each of the three types of Ethernet header shown in Figure 1-4 has a field identifying the format of the Data field in the frame. Generically called a Type field, these fields allow the receiver of an Ethernet frame to know how to interpret the data in the received frame. For instance, a router might want to know whether the frame contains an IP packet, an IPX packet, and so on.

CDP would detect the mismatch and issue a log message to that effect. d. The half-duplex switch will erroneously believe collisions have occurred. Which of the following Ethernet header type fields is a 2-byte field? a. DSAP b. Type (in SNAP header) c. Type (in Ethernet V2 header) d. LLC Control Which of the following standards defines a Fast Ethernet standard? a. 1Q b. 3U c. 1X d. 3Z e. 3AB f. 1AD Suppose a brand-new Cisco IOS–based switch has just been taken out of the box and cabled to several devices.

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