Cisco Unified Communications (UC) is a robust platform that offers users voice, video, and data services. To ensure effective communication, it is essential to understand the various components and protocols that make up the UC architecture. In this article, we will explore some key concepts and questions related to Cisco UC.
- Why is it recommended to use a separate VLAN for IP Phones?
- What is option 150, and option 66 in DHCP?
- Explain Cisco UC Architecture?
- What is a CUCM Cluster?
- What is ANI and DNIS?
- What is the boot-up process for Cisco IP Phones?
- Which transport layer protocols are used for VoIP audio and video payload?
- What is RTP in VoIP, and which layer of the OSI model does it operate on?
- What is RTCP, and what is its purpose?
- What are codecs and DSP?
- What are the different versions of PVDM?
- What is Cisco FLP?
- What are the two POE methods?
- What are 802.3af and 802.3at?
- Explain the signaling process for a call between two phones registered on a CME, where all three devices are connected on the same switch.
- What is FXO and FXS?
- What are T1 and E1, and how many D and B channels do they have in the case of ISDN?
- What is CAS and CCS?
- Explain Q.931 and its use.
- What is the difference between a phone button template and a soft-key template?
- What is the difference between LDAP synchronization and LDAP Authentication?
- What are the various ways in which Cisco unified communication systems can be deployed?
- What is a line group in CUCM?
- What are the different ways in which we can add phones in CUCM?
- Which signaling protocols can be used for integration between CUCM and CUC?
- What is a Dial-peer?
- What are the matching criteria for incoming and outgoing dial-peers in their order of preference?
- What are user-facing features in Cisco ipt?
- What is Extension Mobility?
- What is Call Park?
- What is PLAR?
- What is ISDN, and what is Q.931?
- What is the use of NTP?
- What is BAT in CUCM?
- What are the various ways in which we can add users in CUCM?
- What are Mobile Voice Access and Unified Mobility?
- What is the use of region in CUCM?
- What is a default dial-peer?
- What is AAR?
- What are SRST and MGCP fallbacks?
- In which situation do we not require MGCP fallback configuration with SRST configuration?
- What are the different call flows supported in H323?
- What are a fast start and a slow start, and how do they differ?
- What is early media, and what is the call flow for it?
- What are TCS and OLC in H323?
- What is the difference between an early offer and a delayed offer?
- Which protocol does Q931 backhauling use, and what does it mean?
- What is SDP, and which signaling protocols use it?
- What is silence suppression?
- What is H.323, MGCP, SIP and SCCP Protocols?
In conclusion, Cisco UC is a vast and complex topic, and it requires a lot of knowledge and experience to master. The questions discussed in this article provide a good starting point for anyone looking to deepen their understanding of this technology. Also, we are continuously updating this page with more Interview Questions and Answers. So you can bookmark this page for future updates.