Earning the Cisco Introduction to Cisco Networking Technologies credential tells employers you can work with Cisco technologies at a professional level. Prepare for the 640-821 exam in 2026 with the 91 expert-prepared practice questions from Actual4Exams.
Cisco 640-821 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Introduction to Cisco Networking Technologies (INTRO) |
| Exam Number: | 640-821 |
| Certificate Validity Period: | 3 years (retired exam) |
| Exam Price: | USD 100-125 |
| Passing Score: | 867 / 1000 |
| Related Certifications: | CCNA Routing and Switching 640-811 ICND 640-801 CCNA Composite |
| Exam Format: | Simulations, Drag and Drop, Multiple Choice Multiple Answer, Multiple Choice Single Answer |
| Real Exam Qty: | 50-65 |
| Available Languages: | English, Japanese, Spanish |
| Exam Duration: | 60-90 |
| Recommended Training: | INTRO Course (Retired) |
| Exam Registration: | Cisco Retired Exams List Pearson VUE (historical) |
| Sample Questions: |  |
| Exam Way: | In-person proctored at Pearson VUE test centers; retired exam no longer available |
| Pre Condition: | No formal prerequisites; first exam in two-exam CCNA path, paired with 640-811 |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/retired.html |
Cisco 640-821 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cisco IOS Basics | 20% | - IOS navigation and command-line interface - Initial device configuration - Password and security basics - Managing configuration files |
| Topic 2: Routing and WAN Basics | 15% | - Common WAN technologies - Static and dynamic routing principles - Basic network troubleshooting - Routing table overview |
| Topic 3: Switching Fundamentals | 15% | - Switch operation and port configuration - VLAN basics and configuration - LAN switching concepts |
| Topic 4: IP Addressing and Subnetting | 25% | - IPv4 addressing and classes - Private vs public IP addressing - Subnetting and VLSM - ARP, ICMP, and DHCP operation |
| Topic 5: Network Fundamentals | 25% | - Network components: routers, switches, hubs, cables - Ethernet standards and operation - OSI and TCP/IP model layers - Network types: LAN, WAN, WLAN |
Cisco Introduction to Cisco Networking Technologies (640-821) — Questions Candidates Actually Ask
The 640-821 exam, officially known as Cisco Introduction to Cisco Networking Technologies, is the Cisco test that leads to the CCENT / CCNA (two-exam path) certification at the Associate / Entry level. Passing it validates the skills employers expect from a certified professional. It is also associated with related credentials such as CCNA Routing and Switching, 640-811 ICND, 640-801 CCNA Composite.
The 640-821 exam contains 50-65 questions, and you have 60-90 to complete them. Work out your per-question pace before test day, and flag slow items instead of stalling on them — time pressure, not knowledge, sinks many first attempts. Timed mock exams in the Actual4Exams test engines are the most reliable way to build that rhythm.
The passing score for the 640-821 exam is 867 / 1000, and the official registration fee is USD 100-125. If you miss the mark, a retake means paying the full fee again, so book your seat only when you are ready. A practical benchmark: score consistently above the passing line on timed practice tests before scheduling the real exam.
No formal prerequisites; first exam in two-exam CCNA path, paired with 640-811
Entry requirements can change, so confirm the latest conditions on the official exam page: https://www.cisco.com/c/en/us/training-events/training-certifications/exams/retired.html.
You can book the 640-821 exam through the official registration channels below:
Exam delivery: In-person proctored at Pearson VUE test centers; retired exam no longer available. Seats at popular test centers fill quickly, so schedule early once your preparation is on track.
Cisco recommends the following training options for Cisco Introduction to Cisco Networking Technologies candidates:
Pair any course with the 91 practice questions from Actual4Exams to measure how ready you really are before paying the exam fee.
Yes. A free PDF demo of the Cisco Introduction to Cisco Networking Technologies questions is available, so you can check the question style and answer quality before you pay. Every purchase also includes 365 days of free updates, and if the product expires you can renew the update service at a 50% discount from your member zone.
If you take the corresponding 640-821 exam within 60 days of purchase and do not pass, you can apply for a full refund under the 100% Money Back Guarantee: submit a scan of your enrollment slip and your official Score Report (PDF) within 2 days of the exam date, and the claim is processed within 7 days. Attempts made within 3 days of purchase, downloads without an actual exam attempt, free materials, and expired orders are not eligible, and the candidate name must match the payer name. Prefer new material instead of a refund? You can exchange your purchase for two free products of equal value and keep the update service on your original product. As for delivery, the files are available for instant download and are also emailed to you within one minute of payment — if nothing arrives within 2 hours, contact customer service. There is no limit on how many computers you can install the product on.
The official Cisco Introduction to Cisco Networking Technologies outline is organized into 5 domains. The first three are:
- Network Fundamentals — 25% of the exam
- Cisco IOS Basics — 20% of the exam
- IP Addressing and Subnetting — 25% of the exam
See the complete exam topics section above for the full outline and the weighting of every domain.
Cisco Introduction to Cisco Networking Technologies Sample Questions:
Question 1
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 E1 of the router
C. the MAC address of Host A
D. the MAC address of the email server
E. the MAC address of E0 of the router
F. the MAC address of Switch 1
Question 2
HOTSPOT
lab
Question 3
DRAG DROP
drag drop
Question 4
What is the subnet address for the IP address 172.19.20.23/28?
A. 172.19.20.20
B. 172.19.20.0
C. 172.19.20.15
D. 172.19.20.16
E. 172.19.20.32
Question 5
A router is not operating as expected and the network administrator wants to verify that the router booted using the correct IOS image. Which command should be used to determine which IOS is running on the router?
A. show flash
B. show memory
C. show version
D. show startup-config
E. show config-register
Solutions:
| Question 1 Answer: E | Question 2 Answer: Only visible for members | Question 3 Answer: Only visible for members | Question 4 Answer: D | Question 5 Answer: C |
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