WorksheetsFUNCTIONS OF LAYERS & DATA LINK LAYER
Total questions: 25
Worksheet time: 13mins
OSI stands for __________
a) operating system interface
b) open system interconnection
c) optical service implementation
d) open service Internet
Which of the following tasks is not done by data link layer?
a) framing
b) error control
c) flow control
d) channel coding
TCP/IP model does not have ______ layer but OSI model have this layer.
a) session layer
b) transport layer
c) application layer
d) network layer
Which layer is used to link the network support layers and user support layers?
a) session layer
b) data link layer
c) transport layer
d) network layer
Which sublayer of the data link layer performs data link functions that depend upon the type of medium?
a) logical link control sublayer
b) media access control sublayer
c) network interface control sublayer
d) error control sublayer
Which layer is responsible for process to process delivery in a general network model?
a) network layer
b) transport layer
c) session layer
d) data link layer
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
Transmission data rate is decided by ____________
a) network layer
b) physical layer
c) data link layer
d) transport layer
Which address is used to identify a process on a host by the transport layer?
a) physical address
b) logical address
c) port address
d) specific address
When does the station B send a positive acknowledgement (ACK) to station A in Stop and Wait protocol?
a. only when no error occurs at the transmission level
b. when retransmission of old packet in a novel frame is necessary
c. only when station B receives frame with errors
d. all of the above
Which layer provides the services to user?
a) application layer
b) session layer
c) presentation layer
d) physical layer
TCP/IP model was developed _____ the OSI model.
a) prior to
b) after
c) simultaneous to
d) with no link to
The number of layers in ISO OSI reference model is __________
a) 4
b) 5
c) 6
d) 7
The data link layer takes the packets from _________ and encapsulates them into frames for transmission.
a) network layer
b) physical layer
c) transport layer
d) application layer
Session Layer checkpoints -----------
a) Allow just a portion of a file to be resent
b) detect and recover errors
c) control the addition of headers
d) are involved in dialog control
Which of the following is an application layer service?
a) network virtual terminal
b) file transfer, access and management
c) mail service
d) all of the above
Node to node delivery of the data unit is the responsibility of the ----------- layer
a) Physical
b) Data link
c) Network
d) Transport
Decryption and encryption of data are the responsibility of the ------------ layer
a) Physical
b) Data
c) Presentation
d) Session
The ------------ layer decides the location of synchronization points
a) Transport
b) Session
c) Presentation
d) Application
The term ARQ stands for………….
(a) Automatic repeat quantization
(b) automatic repeat request
(c) automatic retransmission request
(d) acknowledge repeat
request
The data link layer separates a message from one source to a destination is called ………..
(a) Digitizing
(b) controlling
(c) Framing
(d) No such process
The …………..protocol has
neither flow control nor error control
(a) Stop-and -wait
(b) simplex
(c) Go-Back. NARQ
(d) selective repeat ARQ
The simplex protocol and the stop and wait
protocol are for ………channels
(a) noisy
(b) noiseless
(c) either (a) or (b)
(d) neither (a) nor (b)
The technique for data frames to contain an arbitrary number of bits and allows character codes with an arbitrary number of bits per character is called
(a) bit stuffing
(b) character stuffing
(c) byte stuffing
(d) none of these
The data link layer uses
a ………….to detect an error
(a) frame
(b) checksum
(c) protocol
(d) none of these
