In asynchronous serial
communication the physical layer
provides ___________
a. start and stop signalling
b. flow control
c. both start & stop signalling
and flow control
d. only start signalling

1 Answer

Answer :

c. both start & stop signalling
and flow control

Related questions

Description : The portion of physical layer that interfaces with the media access control sublayer is called ___________ a. physical signalling sublayer b. physical data sublayer c. physical address sublayer d. physical transport sublayer

Last Answer : a. physical signalling sublayer

Description : How many 8-bit characters can be transmitted per second over a 9600 baud serial communication link using asynchronous mode of transmission with one start bit, eight data bits, two stop bits, and one parity bit ? a. 600 b. 800 c. 876 d. 1200

Last Answer : b. 800

Description : How many bytes of data can be sent in 15 seconds over a serial link with baud rate of 9600 in asynchronous mode with odd parity and two stop bits in the frame? a. 10,000 bytes b. 12,000 bytes c. 15,000 bytes d. 27,000 bytes

Last Answer : b. 12,000 bytes

Description : In_______transmission, astartbit and a stopbit frame a character byte. A) asynchronous serial B) synchronous serial C) parallel D) (a) and (b)

Last Answer : asynchronous serial

Description : In_______transmission, bits aretransmittedover asingle wire, one ata time. A) asynchronous serial B) synchronous serial C) parallel D) (a) and (b)

Last Answer : (a) and (b)

Description : In_______transmission, bits aretransmittedsimultaneously,each across its own wire. A) Asynchronous serial B) Synchronous serial C) Parallel D) (a) and (b)

Last Answer : Parallel

Description : Choose the Protocols working in the Data Link Control Layer of OSI model below. a. ATM (Asynchronous Transfer Mode), Frame Relay b. HDLC (High Level Data Link Control), SDLC (Synchronous Data Link Control) c. ARP (Address Resolution Protocol), IEEE802.3 d. All the above

Last Answer : d. All the above

Description : What is the minimum number of wires needed to send data over a serial communication link layer? a. 1 b. 2 c. 4 d. 6 e. none of above

Last Answer : 2

Description : The synchronous modems are more costly than the asynchronous modems because a. they produce large volume of data b. they contain clock recovery circuits c. they transmit the data with stop and start bits d. they operate with a larger bandwidth e. none of above

Last Answer : they contain clock recovery circuits

Description : In______ transmission, wesend1 start bit (0) at thebeginningand 1 or more stop bits (1s) at the end of each byte. A) synchronous B) asynchronous C) isochronous D) none of the above

Last Answer : asynchronous

Description : The synchronous modems are more costly than the asynchronous modemsbecause A. they produce largevolumeof data B. they contain clock recovery circuits C. they transmit thedata with stop and start bits. D. they operate witha largerbandwidth E. None of the above

Last Answer : they contain clock recovery circuits

Description : Which transmission mode is used for data communication along telephone lines? (A) Parallel (B) Serial (C) Synchronous (D) Asynchronous

Last Answer : (B) Serial

Description : The functions of a Logical Link Layer (LLC) are a. Error control b. Flow control c. Creating and managing the communication link between two devices with the help of the Transport layer. d. All the above

Last Answer : d. All the above

Description : The functions of a Logical Link Layer (LLC) are ___. A. Error control B. Flow control C. Creating and managing the communication link between two devices with the help of the Transport layer. D. All the above

Last Answer : D. All the above

Description : Which of the following statement is incorrect? a. The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission. b. Half ... in online activities d. Batch processing is the prefered processing mode for telecommunication operation.

Last Answer : Batch processing is the prefered processing mode for telecommunication operation.

Description : Which of the following is NOT true about User Datagram Protocol in transport layer? a. Works well in unidirectional communication, suitable for broadcast information. b. It does three way ... File System d. The lack of retransmission delays makes it suitable for real-time applications

Last Answer : b. It does three way handshake before sending datagrams

Description : The physical layer is concerned with ___________ a. bit-by-bit delivery b. process to process delivery c. application to application delivery d. port to port delivery

Last Answer : a. bit-by-bit delivery

Description : The physical layer is concerned with ___________ A. bit-by-bit delivery B. process to process delivery C. application to application delivery D. port to port delivery

Last Answer : A. bit-by-bit delivery

Description : The physical layer is concerned with ___________ a) bit-by-bit delivery p) process to process delivery c) application to application delivery d) port to port delivery

Last Answer : a) bit-by-bit delivery

Description : Which among the following represents the objectives/requirements of Data Link Layer? a. Frame Synchronization b. Error & Flow Control c. Both a & b d. None of the above

Last Answer : c. Both a & b

Description : Which layer provides the services to user? a.application layer b.session layer c.presentation layer d.physical layer

Last Answer : a.application layer

Description : The physical layer provides __________ a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned

Last Answer : d. all of the mentioned

Description : The _______ layer provides a well defined service interface to the network layer, determining how the bits of the physical layer are grouped into frames A. Data Link B. Physical C. Network D. Session

Last Answer : A. Data Link

Description : The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned

Last Answer : D. all of the mentioned

Description : What specifications does physical layer provides __________. A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned

Last Answer : D. all of the mentioned

Description : The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned

Last Answer : d) all of the mentioned

Description : Which of the following statements is incorrect for Parallel Virtual Machine (PVM)? (A) The PVM Communication model provides asynchronous blocking send, asynchronous blocking receive and non-blocking receive function. ... of such messages. (D) In PVM Model, the message order is not preserved. 

Last Answer : (D) In PVM Model, the message order is not preserved.

Description : In_________ transmission, we send bits oneafter another without startor stop bits or gaps. It is the responsibilityof the receiver togroup the bits. A) synchronous B) asynchronous C) isochronous D) none of the abov

Last Answer : synchronous

Description : The physical layer translates logical communication requests from the ______ into hardware specific operations. a. data link layer b. network layer c. trasnport layer d. application layer

Last Answer : a. data link layer

Description : Transmission control protocol ___________ a) is a connection-oriented protocol b) is a connectionless protocol c) is a protocol working on application layer d) all of the mentioned

Last Answer : a) is a connection-oriented protoco

Description : The Internet Control Message Protocol (ICMP) A. allows gateways to send error acontrol messages toother gateways or hosts B. provides communication between the Internet Protocol Software on one machine ... and takeaction to correct theproblem D. All of theabove E. None of the above

Last Answer : All of theabove

Description : Which data communication method is used to transmit the data over a serial communication link? a. simplex b. half-duplex c. full-duplex d. b and c e. None of above

Last Answer : full-duplex

Description : The situation when both transmitter and receiver have to work in tandem is referred to as (A) parallel (B) serial (C) synchronous (D) asynchronous

Last Answer : (C) synchronous

Description : The start and stop bits are used in serial communication for (A) error detection (B) error correction (C) synchronization (D) slowing down the communication

Last Answer : (C) synchronization 

Description : Which is the protocol that maps varying IP addresses to the Physical MAC Address of a machine in a LAN network? a. ARQ (Automatic Repeat Request) b. ARP (Address Resolution Protocol) c. SLIP (Serial Line Internet Protocol) d. PLIP (Parallel Line Internet Protocol)

Last Answer : b. ARP (Address Resolution Protocol)

Description : Which is the protocol that maps varying IP addresses to the Physical MAC Address of a machine in a LAN network? A. ARQ Automatic Repeat Request B. ARP Address Resolution Protocol C. SLIP Serial Line Internet Protocol D. PLIP Parallel Line Internet Protocol

Last Answer : B. ARP Address Resolution Protocol

Description : Communiction circuits that transmit data in both directions but not at the same time are operating in a. a simplex mode b. a half duplex mode c. a full duplex mode d. an asynchronous mode

Last Answer : a half duplex mode

Description : How many synchronous and asynchronous modes are there in serial port of 8096? M. Krishna Kumar/IISc. Bangalore M5/V1/June 04/1 Microprocessors and Microcontrollers/ Multiple Choice Questions Architecture of Micro ... 2, 2 respectively b) 3,1 respectively c) 1, 3 respectively d) 1, 2 respectively

Last Answer : c) 1, 3 respectively

Description : The purpose of a proxy server is to control exchange of data between the two networks at …………..instead of ……….. A. an application level , an IP level B. network layer, physical layer C. an application layer, physical layer D. Network layer , an application layer

Last Answer : A. an application level , an IP level

Description : Data Link Control Protocol (HDLC) is implemented at the ……… A. Data link layer B. Network layer C. transport layer D. Physical layer

Last Answer : A. receive sliding window.

Description : In IPv6,options are inserted between the _________and the ___________ data. A) baseheader;extensionheader B) baseheader;upper-layer data C) base header; frame header D) noneof the abov

Last Answer : baseheader;upper-layer data

Description : In IPv6, options are inserted between the _________ and the ___________ data A. base header; extension header B. base header; upper-layer data C. base header; frame header D. none of the above

Last Answer : B. base header; upper-layer data

Description : In the layer hierarchy as the data packet moves from the upper to the lower layers, headers are ___________. A. Added B. Removed C. Rearranged D. Modified

Last Answer : A. Added

Description : In the layer hierarchy as the data packet moves from the upper to the lower layers, headers are ___________ a) Added b) Removed c) Rearranged d) Modified

Last Answer : a) Added

Description : The purpose of the _______is to provide flow and error control for the upper-layer protocols that actually demand theseservices A) MAC B) LLC C) LLU D) none of the above

Last Answer : LLC

Description : Transport layer can identify the symptoms of overload nodes using _________ a. Flow control b. Traffic control c. Byte orientation d. Data integrity

Last Answer : b. Traffic control

Description : Which of the following is not a congestion policy at network layer? a. Flow Control Policy b. Packet Discard Policy c. Packet Lifetime Management Policy d. Routing Algorithm

Last Answer : a. Flow Control Policy

Description : The ________ modeprovides synchronizationfor the entire stream of bits must. In other words, it guarantees that the data arrive ata fixed rate. A) synchronous B) asynchronous C) isochronous D) none of the above

Last Answer : isochronous

Description : SONET is a _______ TDM system. A) asynchronous B) synchronous C) statistical D) none of the above

Last Answer : none of the above

Description : Which of the following condition is usedto transmit two packets overa medium at the same time? A. Contention B. Collision C. Synchronous D. Asynchronous E. None of the above

Last Answer : Collision