Cisco 640-821 - Introduction to Cisco Networking Technologies

Cisco 640-821 Actual PDF
  • Exam Code: 640-821
  • Exam Name: Introduction to Cisco Networking Technologies
  • Updated: Oct 04, 2026
  • Q & A: 91 Questions and Answers
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Cisco 640-821 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: IP Addressing and Subnetting25%- ARP, ICMP, and DHCP operation
- Subnetting and VLSM
- IPv4 addressing and classes
- Private vs public IP addressing
Topic 2: Network Fundamentals25%- Network types: LAN, WAN, WLAN
- OSI and TCP/IP model layers
- Ethernet standards and operation
- Network components: routers, switches, hubs, cables
Topic 3: Cisco IOS Basics20%- Initial device configuration
- Password and security basics
- Managing configuration files
- IOS navigation and command-line interface
Topic 4: Routing and WAN Basics15%- Static and dynamic routing principles
- Basic network troubleshooting
- Common WAN technologies
- Routing table overview
Topic 5: Switching Fundamentals15%- Switch operation and port configuration
- VLAN basics and configuration
- LAN switching concepts

Cisco Introduction to Cisco Networking Technologies Sample Questions:

Question #1

DRAG DROP
drag drop

Reveal Solution  Discussion  0

Correct Answer:

Question #2

Which Cisco IOS command identifies the system hardware and the IOS currently running on a router?

  • A. show version
  • B. show startup-config
  • C. show processes
  • D. show running-config
  • E. show controllers
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #3

Which of the following commands displays the configurable parameters and statistics of all interfaces on a router?

  • A. show startup-config
  • B. show processes
  • C. show versions
  • D. show running-config
  • E. show interfaces
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

Question #4

Which types of cables are required to interconnect the devices shown in the graphic?
(Choose three.)

  • A. straight-through cable
  • B. V.35 cable
  • C. crossover cable
  • D. USB cable
  • E. RJ-11 cable
  • F. rollover cable
Reveal Solution  Discussion  0

Correct Answer: A,C,F  🗳️

Question #5

Refer to the exhibit. If host A sends an IP packet to host B, what will the OSI Layer 3 source address be in the packet when it reaches host B?

  • A. C3:C3:C3:C3:C3:C3
  • B. B2:B2:B2:B2:B2:B2
  • C. 10.168.11.88
  • D. A1:A1:A1:A1:A1:A1
  • E. 10.168.10.99
  • F. 10.168.11.65
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

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