Cisco 640-821 : Introduction to Cisco Networking Technologies

640-821 testking pdf

Exam Code: 640-821

Exam Name: Introduction to Cisco Networking Technologies

Updated: Jun 12, 2026

Q & A: 91 Questions and Answers

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Cisco Introduction to Cisco Networking Technologies Sample Questions:

1. DRAG DROP
drag drop


2. Refer to the topology and MAC address table shown in the exhibit. Host A sends a data frame to host D.
What will the switch do when it receives the frame from host A?

A) The switch will add the destination address of the frame to the MAC address table and forward the frame to host
B) The switch will add the source address and port to the MAC address table and forward the frame to host D.
C) The switch will flood the frame out of all ports except for port Fa0/3.
D) The switch will discard the frame and send an error message back to host A.


3. DRAG DROP
drag drop


4. WAN data link encapsulation types include which of the following? (Choose two.)

A) T1
B) Frame Relay
C) PPP
D) ISDN
E) DSL


5. Host A needs to communicate with the email server shown in the graphic. What address will be placed in the destination address field of the frame when it leaves Host A?

A) the MAC address of Switch 2
B) the MAC address of the email server
C) the MAC address of E1 of the router
D) the MAC address of E0 of the router
E) the MAC address of Host A
F) the MAC address of Switch 1


Solutions:

Question # 1
Answer: Only visible for members
Question # 2
Answer: B
Question # 3
Answer: Only visible for members
Question # 4
Answer: B,C
Question # 5
Answer: D

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