Quizzes

What the CPaaS section actually says. The opened Wikipedia section describes CPaaS as adding voice, video, and messaging without building the back-end infrastructure.

True. That is the section's sentence.

What the CPaaS section actually says. That section publishes a jitter budget in milliseconds.

False. It names jitter, latency, and packet loss. It does not number them.

Twilio and Vonage, from the articles. The Twilio article says the text messaging API was released in February 2010.

True. That month is in the history section that opened.

Twilio and Vonage, from the articles. This lab stores an Authy or SendGrid secret so the next reader can call the API.

False. The article names the acquisitions. It does not ask you to publish a secret.

Bandwidth, Sinch, Telnyx, Infobip, and Bird. The Bandwidth home page that opened lists an Emergency Calling API.

True. It is in the communication APIs list on that page.

Bandwidth, Sinch, Telnyx, Infobip, and Bird. This lab verified a Wikipedia article named MessageBird.

False. That title returned HTTP 404. The developer site and the Bird docs did open.

What SIP is for. IANA's SIP parameters page cites RFC 3261 and shows Last Updated 2026-08-17.

True. Both are on the registry page that opened.

What SIP is for. SIP itself carries the voice packets.

False. The Wikipedia article says SIP works with other protocols that carry the session media.

Offer, answer, and SDP. RFC 8866 says it obsoletes RFC 4566.

True. That sentence is on the RFC 8866 page.

Offer, answer, and SDP. RFC 4733 is the SIP registration specification.

False. It is the RTP payload for DTMF digits, tones, and signals.

RTP, SRTP, and WebRTC. RFC 8825 says it does not itself specify a protocol.

True. The abstract calls it an applicability statement.

RTP, SRTP, and WebRTC. RTCP is the protocol that carries the voice samples.

False. Wikipedia says RTP carries the media and RTCP monitors statistics and quality of service.

E.164 numbers and direct inward dial. The E.164 article limits plan-conforming numbers to fifteen digits.

True. That maximum is in the introduction that opened.

E.164 numbers and direct inward dial. DID means the PBX never learns which number was dialed.

False. The article says the dialed number is transmitted so the extension can be reached.

Two domains and a SIP trunk. The SIP trunking article says the private and public domains meet through a SIP trunk.

True. That is the interconnection sentence.

Two domains and a SIP trunk. The Telnyx guide publishes a numeric daily spend cap in the overview that opened.

False. It names a daily spend limit as a component. The amount was not in that overview.

How a guide tells you to get a number. The Telnyx guide sends a message with HTTP POST to https://api.telnyx.com/v2/messages.

True. That URL is in the guide that opened.

How a guide tells you to get a number. The sample from and to values are numbers this lab owns.

False. They are placeholders in the vendor guide.

SMS, and the 160-character line. The SMS article says messages are up to 160 characters.

True. That figure is in the introduction.

SMS, and the 160-character line. Sinch's Conversation API page says SMS is the only channel.

False. It also names RCS, WhatsApp, Viber Business, and Facebook Messenger.

MMS and the media a page will store. Bandwidth's guide sets the MMS segment count to 1.

True. That sentence is on the messaging page.

MMS and the media a page will store. Bandwidth's guide says it keeps the text of the message for you to download later.

False. It says content is not stored, only metadata, once the webhook is acknowledged.

10DLC is a name on the compliance pages. Twilio's A2P 10DLC navigation names Sole Proprietor registration.

True. Register Direct Sole Proprietors is a heading that opened.

10DLC is a name on the compliance pages. This lab can quote a 10DLC monthly fee from the pages it opened.

False. No fee was read. The row stays confirm.

A, B, and C on the STIR article. Partial Attestation, B, is the article's label when the customer is known and the full number is not verified.

True. The PBX-extension example is in that paragraph.

A, B, and C on the STIR article. Gateway Attestation means the provider recognizes every digit of the caller's number.

False. C means the call is verified only as coming from a known gateway.

SHAKEN, PASSporT, and the Identity header. The article says the token is appended in an Identity field.

True. That field name is in the STIR section.

SHAKEN, PASSporT, and the Identity header. RFC 8224's title says it obsoletes RFC 3261.

False. The page says it obsoletes RFC 4474. RFC 3261 is the SIP specification.

Where the vendors put the same words. Bandwidth's voice page describes a caller-name query for VoIP calls in the US and Canada.

True. That geography is in the sentence that opened.

Where the vendors put the same words. This room can price Twilio SHAKEN onboarding.

False. The title opened. A price did not.

E911, the PSAP, and NG911. The E911 article says a landline dispatch screen receives a physical address.

True. Wireless is the case it associates with geographic coordinates.

E911, the PSAP, and NG911. This lab opened Kari's Law as a Wikipedia article.

False. That title returned HTTP 404.

Twilio's emergency calling page. On Twilio's trunk emergency page, E911 includes the Twilio number and the address.

True. That is the E911 sentence.

Twilio's emergency calling page. Every Twilio number has E911, according to that page.

False. The page says some numbers have neither Basic 911 nor E911.

Bandwidth's two emergency hosts. Bandwidth publishes two emergency base URLs on the guide that opened.

True. Dashboard and the 911 Access Dashboard are both listed.

Bandwidth's two emergency hosts. Dynamic Location Routing rules were specified on that same guide.

False. DLR is a home-page name. The rule text was not opened.

Voice and video names that opened. Twilio Video's docs name JavaScript, Android, and iOS quickstarts.

True. Those three are on the page that opened.

Voice and video names that opened. The Vonage Voice page publishes a per-minute price next to the language sentence.

False. It says see pricing. This session did not open a price table.

Messaging and verify. Vonage Verify lists Silent Authentication among its channels.

True. It is in the channel list on the Verify page.

Messaging and verify. Infobip's sample JSON is a live customer credential.

False. It is a documentation sample. Do not treat it as an account.

One Plivo number that really was on the page. The Plivo page states a WhatsApp minimum commitment of USD 1,000 per month in the US data region.

True. That figure is on the prerequisites page.

One Plivo number that really was on the page. That page states the numeric WhatsApp platform fee that starts on 1 November 2026.

False. It states the date and points at a pricing page that was not opened.

Webhooks come inbound. Twilio's introduction says webhooks are requests from Twilio to your app.

True. That is the reverse of the REST direction the page describes.

Webhooks come inbound. Bandwidth's HTTP 202 means the handset has already displayed the message.

False. 202 means the message was accepted into the queue.

TwiML verbs and what an IVR is. Gather is a TwiML verb on the page that opened.

True. It is in the verb list.

TwiML verbs and what an IVR is. The IVR article says an IVR is only DTMF and never speech recognition.

False. The article names both voice recognition and DTMF.

A ladder you are allowed to draw. This lab's ladders are teaching sketches, not a customer packet capture.

True. No capture was opened.

A ladder you are allowed to draw. Media Streams' WebSocket field list was copied into this room.

False. The feature is named. The schema was not opened.

Contact center words that stay general. The IVR article treats an ACD as something an IVR is often combined with, not as the IVR itself.

True. They are named as combination, not as synonyms.

Contact center words that stay general. This lab opened TaskRouter's attribute list.

False. The product name is on the Twilio docs home. The fields were not opened.

AI voice agents, only the sentences that opened. LiveKit describes an agent as a program that joins a room as a participant.

True. Python and Node.js are the languages the introduction names.

AI voice agents, only the sentences that opened. This lab opened a price for Telnyx voice agents.

False. Agents and a Beta LiveKit label were in the navigation. A price was not.

Bridges the open pages actually name. The Kamailio article lists a SIP-WebRTC gateway as a feature.

True. It is in the feature list that opened.

Bridges the open pages actually name. A customer success quote was opened for Bandwidth and Zoom Phone.

False. The integration name is on the home page. A quote was not opened.

Numbers you may repeat. The fifteen-digit maximum in this lab comes from the E.164 article.

True. It is not a vendor field length unless a vendor page says so.

Numbers you may repeat. IANA's 2026-08-17 date is a mean opinion score.

False. It is the Last Updated date on the SIP parameters registry.

What observability meant on the pages. LiveKit's agents page names transcripts and traces as Cloud observability.

True. That sentence opened.

What observability meant on the pages. This lab sets a jitter alarm at a specific millisecond value.

False. No jitter budget was opened.

Prices that stay confirm. Sinch's phrase cost-efficient is a numeric rate.

False. No currency amount was in that sentence.

Prices that stay confirm. A confirm row has no URL because the price page was not verified.

True. That is the rule for this lab.

Compliance starts by not pasting a secret. This repository includes a Telnyx API key from the guide.

False. The guide shows a placeholder. The key stays in the portal.

Compliance starts by not pasting a secret. The Twilio article mentions data breaches in 2022 and 2024.

True. That sentence is in the introduction that opened.

Leaving a PBX without inventing a cutover. The Asterisk dialplan page says the dialplan is extensions.conf.

True. It also names dialplan reload.

Leaving a PBX without inventing a cutover. This lab publishes a weekend cutover plan with hour counts.

False. No such timeline was opened.

Avaya, UCCE, and the pages that did not open. This session opened the UC Lab Free University site.

True. The title UC Lab Free University returned HTTP 200.

Avaya, UCCE, and the pages that did not open. The Zoom, Talkdesk, and Avaya lab URL is linked because it opened.

False. It returned HTTP 404, so this lab does not link it.

FreeSWITCH and Asterisk. The FreeSWITCH article says version 1.10 is the latest release.

True. That sentence was in the history section. Recheck before you install.

FreeSWITCH and Asterisk. FreeSWITCH's manual is a Twilio TwiML reference.

False. It is the FreeSWITCH users manual. TwiML is a Twilio page.

Kamailio is a SIP server. The Kamailio article says it can be a registrar, a proxy, or a redirect server.

True. Those three roles are in the opening paragraph.

Kamailio is a SIP server. The article includes a price for least-cost routing.

False. Least-cost routing is a feature name. No rate was copied.

LiveKit, Jitsi, Matrix, and Jami. LiveKit's telephony page says LiveKit Phone Numbers covers local and toll-free numbers in the United States.

True. It also says that service is in LiveKit Cloud.

LiveKit, Jitsi, Matrix, and Jami. The Jami Web preview date on the site is an ITU recommendation.

False. It is a news date on jami.net, 1 September 2026.