Voice Over IP Test
According to the ITU standard G.114, what is the maximum delay acceptable for high quality voice?
According to the OSI model, which layer performs the function of transforming bits of data into electrical signals and sending those signals across the media?
Between Asymmetric and Symmetric transmissions, which statement is true of Symmetric transmission?
For which of the following services is SS7 responsible?
How many bits are there in a Class B address in Net ID (Network portion) and Host ID (Host Portion) fields by default?
How many bits are there in a MAC address?
How many voice conversations are possible on an E1 line simultaneously?
Into how many smaller bandwidth channels can a T1 line be subdivided?
Is it possible for a POTS line running broadband DSL service to support VoIP telephony in the home?
Is it possible to transport fax and modem traffic over a VoIP network?
On which layer of the OSI model does TCP & UDP work?
On which of the following IP enabled devices can VoIP telephone services work?
State whether true or false VoIP runs only on the internet. It cannot run on any other network.
State whether true or false: QSIG is implemented on PRI interfaces only.
State whether true or false: RTP (Real-time Transport Protocol) requests retransmission if a voice packet is lost.
State whether true or false: Stateful firewalls do not remember the previous traffic that has occurred earlier in the session
State whether true or false: You have to use an H.323 proxy if the firewall does not support dynamic access control.
Through which protocols can VPNs be implemented at layer 2?
What are the functions of Call Control?
What are the three elements of a security policy necessary for a VoIP network?
What are the three main steps required in the analog-to-digital conversion process?
What are the two steps involved in the process of conversion of digital signals into analog signals?
What do you call a medium which allows multiple channels?
What is a soft phone?
What is the full form of 3DES?
What is the full form of BGP?
What is the full form of CCS?
What is the full form of DPNSS?
What is the full form of DSL?
What is the full form of L2TP?
What is the full form of POTS?
What is the full form of PSTN?
What is the full form of SS7?
What is the full form of TDM?
What is the function of D (Data) channel in ISDN?
What is the length of IP v4 addresses (in bits)?
What is the minimum bandwidth required for VoIP to deliver high quality services?
What is the path of wires that connect the subscriber's telephone to the telephone company's switch located at the latter's central office known as?
What is the range of the frequency of a telephone channel?
Which layer of the TCP/IP model ensures the quality and deliverability of VoIP packets?
Which of the following are examples of CCS?
Which of the following are ITU standards for voice compression?
Which of the following are the components of local loop signaling?
Which of the following are the functions of a voice gateway?
Which of the following are the major framing standards used for Channel Associated Signaling (CAS) by T1?
Which of the following are the major VoIP protocols?
Which of the following are types of address signaling?
Which of the following are voice compression techniques?
Which of the following cables is mostly used in traditional telephones?
Which of the following can be used to hide internal network addresses and allow several computers on LAN to simultaneously share the router's global IP address?
Which of the following can correct small amounts of packet loss in VoIP network?
Which of the following classes are used for host addressing?
Which of the following devices is used to physically connect all network devices like PCs, IP phones etc. to the LAN?
Which of the following encryption technologies cannot be used on international networks?
Which of the following has the correct sequence (from the lowest layer to the highest)?
Which of the following is a telephony signaling protocol suite used to set up most of the world's PSTN calls?
Which of the following is one of the most important things common in all IP phones?
Which of the following is responsible for electrical echo on telephone networks?
Which of the following is the most common trunk signal type used by E&M signaling?
Which of the following is the reason for using UDP instead of TCP for voice transmission?
Which of the following is used by an exchange to convert analog audio to digitized audio?
Which of the following ITU standards delivers faxed documents as e-mail attachments over a VoIP netwok?
Which of the following methods is most commonly used to remove echo in telephone networks these days?
Which of the following modes of delivery are supported by IPsec?
Which of the following protocols are assigned ports for each voice call?
Which of the following protocols does VoIP use at the transport layer of the TCP/IP model?
Which of the following protocols is used in a VoIP call at the application layer of the TCP/IP model?
Which of the following provide transport security by using encryption, data integrity and data authentication?
Which of the following QoS techniques can be used to ensure consistent delivery and throughput of voice packets?
Which of the following services are provided by Real-time Transfer Protocol(RTP)?
Which of the following signaling protocols can be used with gateways over a VoIP network?
Which of the following signaling protocols is based on the ISDN Q.931 standard?
Which of the following signaling protocols is used in a common channel to signal all other channels in ISDN?
Which of the following statements are true regarding circuit-switched networks (POTS) and packet-switched networks?
Which of the following statements regarding CRTP is/are false?
Which of the following VoIP protocols define end-to-end call signaling methods?
Which of the following VoIP protocols is an emerging standard for PSTN gateway control?
Which protocol is used to reduce the size of RTP/UDP/IP headers from 40 bytes to 2 bytes (mostly) to save bandwidth and provide better throughput?
Which protocol provides end-to-end delivery services for data that requires real-time support such as interactive voice and video?
Which QoS technique is used to define the maximum size of data packets to prevent excessive serialization delays?
Which TCP port number is used by H.323 protocol for call setup?