Cisco 640-821 : Introduction to Cisco Networking Technologies

  • Exam Code: 640-821
  • Exam Name: Introduction to Cisco Networking Technologies
  • Updated: Jun 06, 2026
  • Q & A: 91 Questions and Answers

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Cisco Introduction to Cisco Networking Technologies Sample Questions:

1. What determines the IOS that the router will load?

A) the load register and the startup system command
B) the start up register and startup system command
C) the boot register and the startup system command
D) the configuration register and the setup command
E) the configuration register and boot system commands


2. Which Layer 4 protocol is used for a Telnet connection?

A) DNS
B) IP
C) ICMP
D) UDP
E) TCP


3. Which IP address is a private address?

A) 172.20.14.36
B) 172.33.194.30
C) 12.0.0.1
D) 192.169.42.34
E) 168.172.19.39


4. DRAG DROP
drag drop


5. During the boot sequence, a 2600 series router needs to locate and load an operating system. What is the default order the router uses to find an operating system?

A) ROM, TFTP server, Flash
B) Flash, ROM, TFTP server
C) Flash, TFTP server, RAM
D) Flash, TFTP server, ROM
E) Flash, NVRAM, TFTP server


Solutions:

Question # 1
Answer: E
Question # 2
Answer: E
Question # 3
Answer: A
Question # 4
Answer: Only visible for members
Question # 5
Answer: D

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