Free 100-890: Supporting Cisco Collaboration Devices Exam Questions and Answers
Supporting Cisco Collaboration Devices is exam 100-890, part of Cisco certifications. In Cisco's current scheme the first digit gives the level: 100 is entry, 200 associate, 300 the CCNP concentration exams, 350 the CCNP core exams that also qualify you for CCIE, 500 specialist and 700 the unproctored sales exams. Older codes such as 400-, 640- and 642- predate the February 2020 restructure, when every CCNA track was collapsed into one exam and CCNP moved to a core-plus-concentration model.
Candidates comparing 100-890 exam dumps, ExamTopics and other 100-890 practice tests use this page for the answers and explanations behind each question. Download the free 100-890 PDF, then sit the timed 100-890 exam simulation before booking with Cisco.
Last updated: November 4, 2026
- Exam code
- 100-890
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- Cisco
- Questions in our bank
- 1000+
- Free to read
- First 10, with answers
- Our test mode duration & pass mark
- 130 mins · 70%
- Verified answers
- Reviewed weekly
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Question #1
A Cisco IP phone with a PC attached behind it receives an IP address from the VLAN 10 data scope and cannot reach the CUCM subscriber, which is in the voice subnet for VLAN 20. Refer to the exhibit. Exhibit: interface GigabitEthernet1/0/5 switchport mode access switchport access vlan 10 spanning-tree portfast Which command should be added to the interface?
Correct answer: A
Explanation
The switch port has no voice VLAN, so the phone's traffic is placed in data VLAN 10. Adding switchport voice vlan 20 lets the switch advertise the voice VLAN to the phone through CDP or LLDP-MED, which then tags its own traffic while the PC stays in VLAN 10. Making the port a trunk or changing the native VLAN would also affect the PC.
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Question #2
Which VoIP network component connects an IP telephony network to the public switched telephone network (PSTN)?
Correct answer: C
Explanation
A voice gateway translates between IP voice and the PSTN, converting signaling and media formats. A gatekeeper handles admission control and address resolution, and an MCU mixes multiple conference participants.
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Question #3
A technician connects a new Cisco IP phone. The phone receives an IP address and a TFTP server address from DHCP but remains at the Registering screen. Auto-registration is disabled on CUCM. What should the technician do first?
Correct answer: B
Explanation
With auto-registration disabled, CUCM only registers phones that are configured in its database, so the phone must be added with its MAC address. The phone already has a TFTP address, so DHCP option 150 is not the problem.
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Question #4
Which two are audio codecs used in IP telephony? (Choose two.)
Select 2 answers.
Correct answer: C, D
Explanation
G.711 and G.729 are audio codecs commonly used for voice calls. H.264 and H.265 are video compression standards.
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Question #5
A technician must replace a failed codec in a Cisco IX5000 system. The failed codec can still be reached over the network. Which action should be performed first?
Correct answer: A
Explanation
If the failed codec is reachable, its configuration should be saved first so it can be restored to the replacement. A factory reset or deleting the device would remove the settings before they are saved.
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Question #6
Which Cisco Webex device is an all-in-one video bar designed for huddle rooms?
Correct answer: D
Explanation
The Webex Room Kit Mini combines camera, microphones, speakers and codec in a single bar for small huddle rooms. The Kit Pro and Kit Plus use separate cameras and codecs for larger rooms, and the Room 55 is an integrated system with its own display.
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Question #7
Which two methods can be used to upgrade the software on a Cisco video endpoint? (Choose two.)
Select 2 answers.
Correct answer: A, B
Explanation
Endpoint software can be upgraded by uploading the package in the endpoint web interface or by scheduling it from Cisco TMS. The Touch 10 is a controller and cannot store a package for the codec, and SNMP is not used to transfer software.
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Question #8
Drag and drop each protocol or service used with Cisco Unified Communications Manager (CUCM) on the left onto its default port on the right. Left: SCCP; SIP; SIP over TLS; TFTP Right: Target 1 = UDP 69; Target 2 = TCP 2000; Target 3 = TCP 5060; Target 4 = TCP 5061
Drag or tap each item onto its target, then reveal.
- Target 1Drop here
- Target 2Drop here
- Target 3Drop here
- Target 4Drop here
Correct answer: Target 1 = TFTP; Target 2 = SCCP; Target 3 = SIP; Target 4 = SIP over TLS
Explanation
Phones download configuration and firmware files from TFTP on UDP 69. SCCP signaling uses TCP 2000, and unsecured SIP uses 5060. SIP over TLS moves to 5061, which is the common mix-up with 5060.
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Question #9
Which server in a Cisco Unified Communications Manager cluster holds the read/write copy of the configuration database?
Correct answer: C
Explanation
The Publisher is the first server installed in a cluster. It holds the read/write configuration database and replicates it to the Subscribers. Subscribers keep a copy for call processing, but configuration changes are made on the Publisher.
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Question #10
A technician installs a Cisco IP phone in a new cubicle and must verify which VLAN the phone is using for voice traffic. Which phone menu should the technician open?
Correct answer: A
Explanation
The Network configuration menu lists the IP settings and the Operational VLAN ID and Admin VLAN ID. Status messages show a log of events, such as a TFTP error, and Call statistics show per-call counters. Model information lists hardware identifiers only.
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Discussion
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FAQ
Learn More: https://www.cisco.com/site/us/en/learn/training-certifications/certifications/index.html
- Q1: What is the 100-890: Supporting Cisco Collaboration Devices exam?
- A: 100-890: Supporting Cisco Collaboration Devices is a Cisco certification exam. Judging by the questions in our bank, it concentrates on cisco, phone, webex, bootup and dx80.
- Q2: What topics does the 100-890: Supporting Cisco Collaboration Devices exam cover?
- A: Questions in our 100-890: Supporting Cisco Collaboration Devices bank cluster around cisco, phone, webex, bootup, dx80, room, microphone and unified. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for 100-890: Supporting Cisco Collaboration Devices?
- A: Work through the 100-890: Supporting Cisco Collaboration Devices practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real 100-890: Supporting Cisco Collaboration Devices exam questions?
- A: They are drawn from officially released past questions and from community members who have sat 100-890: Supporting Cisco Collaboration Devices. Answers are verified and updated weekly.
- Q5: Where do I register for the 100-890: Supporting Cisco Collaboration Devices exam?
- A: Register through Cisco directly. Exampractice is not affiliated with Cisco and does not administer the exam.
- Q6: Is there a free 100-890: Supporting Cisco Collaboration Devices sample?
- A: Yes. Every 100-890: Supporting Cisco Collaboration Devices page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
- Q7: What are Cisco Certification Exams?
- A: Cisco Certification Exams validate your expertise in using and managing Cisco networking and IT solutions. These certifications demonstrate your proficiency in designing, implementing, and troubleshooting Cisco-based networks and systems, covering areas such as routing and switching, security, wireless, data center, and collaboration.
- Q8: Why should I pursue Cisco Certification?
- A: Cisco Certification enhances your professional credibility, showcasing your skills and knowledge in Cisco technologies. This can lead to better job opportunities, higher salaries, and career advancement in networking and IT industries.
- Q9: What are the benefits of Cisco Certification?
- A: Benefits include recognition as a certified networking professional, improved job performance, access to exclusive resources, continuing education opportunities, and staying current with the latest Cisco technologies and best practices.
- Q10: Who should take Cisco Certification Exams?
- A: Network engineers, system administrators, IT professionals, and anyone involved in designing, implementing, and managing network solutions using Cisco products should consider these certifications to validate their expertise and advance their careers.
- Q11: What types of Cisco Certification Exams are available?
- A: Cisco offers various certification paths, including:
- Q12: How do I prepare for Cisco Certification Exams?
- A: Preparation can include official Cisco training courses, study guides, practice exams, online tutorials, and hands-on experience with Cisco networking equipment and solutions.
- Q13: Where can I take Cisco Certification Exams?
- A: Cisco Certification Exams can be taken at authorized Pearson VUE testing centers worldwide or online, providing flexibility to fit your schedule and location.
- Q14: How do Cisco Certifications impact my career?
- A: Cisco Certifications significantly boost your career by demonstrating your expertise to employers, making you a more competitive candidate for advanced roles and promotions in networking and IT.
- Q15: Are there any prerequisites for Cisco Certification Exams?
- A: Some exams may have prerequisites, such as foundational knowledge or prior certifications. Check the specific requirements for each certification path on the Cisco website.
- Q16: How often do I need to recertify for Cisco Certifications?
- A: Cisco Certifications typically require recertification every three years to ensure that certified professionals stay updated with the latest networking technologies and industry practices.



