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Cisco 640-821 Exam Syllabus Topics:

Cisco Introduction to Cisco Networking Technologies Sample Questions:

1. Which three statements are true about the operation of a full-duplex Ethernet network?
(Choose three.)

A) Ethernet hub ports are preconfigured for full-duplex mode.
B) There are no collisions in full-duplex mode.
C) In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
D) The host network card and the switch port must be capable of operating in full-duplex mode.
E) A dedicated switch port is required for each full-duplex node.

2. When files are transferred between a host and an FTP server, the data is divided into smaller pieces for transmission. As these pieces arrive at the destination host, they must be reassembled to reconstruct the original file. What provides for the reassembly of these pieces into the correct order?

A) the frame check sequence in the Ethernet frame trailer
B) the acknowledgement number in the segment header
C) the Start Frame Delimiter in the 802.3 Preamble
D) the TTL in the IP header
E) the sequence number in the TCP header

3. Which statements accurately describe CDP? (Choose three.)

A) CDP is a Cisco proprietary protocol.
B) CDP is a datalink layer protocol.
C) CDP can discover directly connected neighboring Cisco devices.
D) CDP is an IEEE standard protocol.
E) CDP is a network layer protocol.
F) CDP can discover Cisco devices that are not directly connected.

4. How many simultaneous Telnet sessions does a Cisco router support by default?

A) 6
B) 5
C) 4
D) 3
E) 1
F) 2

5. An administrator cannot connect from R1 to R2. To troubleshoot this problem, the administrator has entered the command shown in the exhibit. Based on the output shown, what could be the problem?

A) The serial interface has the wrong type of cable attached.
B) The serial interface is configured for half duplex.
C) The serial interface has a full buffer.
D) The serial interface does not have a cable attached.
E) The serial interface is configured for the wrong frame size.

Solutions: