Intro to Networks quiz 1 Review

The number of layers in Internet protocol stack a) 5 b) 7 c) 6 d) None of the mentioned

5

The OSI model has _______ layers. a) 4 b) 5 c) 6 d) 7

7

The number of layers in ISO OSI reference model a) 5 b) 7 c) 6 d) None of the mentioned

7

Which of this is not a constituent of residential telephone line? a) A high-speed downstream channel b) A medium-speed downstream channel c) A low-speed downstream channel d) None of the mentioned

A low-speed downstream channel Explanation: The third part is ordinary two-way telephone channel.

Among the optical-distribution architectures that is essentially switched Ethernet is a) AON b) PON c) NON d) None of the mentioned

AON Explanation: Active optical networks are essentially switched Ethernets.

5. The first Network a) CNNET b) NSFNET c) ASAPNET d) ARPANET

ARPANET

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

Added Explanation: Every layer adds its own header to the packet from previous layer.

Home Access is provided by a) DSL b) FTTP c) Cable d) All of the mentioned

All of the mentioned

The functionalities of presentation layer includes a) Data compression b) Data encryption c) Data description d) All of the mentioned

All of the mentioned

In DSL telco provides these services a) Wired phone access b) ISP c) All of the mentioned d) None of the mentioned

All of the mentioned Explanation: The same company which provides phone connection is also its ISP in DSL.

Choose the statement which is not applicable for cable internet access a) It is a shared broadcast medium b) It includes HFCs c) Cable modem connects home PC to Ethernet port d) Analog signal is converted to digital signal in DSLAM

Analog signal is converted to digital signal in DSLAM Explanation: In cable access analog signal is converted to digital signal by CMTS.

In TCP IP Model, when data is sent from device A to device B, the 5th layer to receive data at B is a) Application layer b) Transport layer c) Link layer d) Session layer

Application layer

Application layer is implemented in a) End system b) NIC c) Ethernet d) None of the mentioned

End system

Transport layer is implemented in a) End system b) NIC c) Ethernet d) None of the mentioned

End system

Which organization has authority over interstate and international commerce in the communications field? a) ITU-T b) IEEE c) FCC d) ISOC

FCC

Identify the statement which cannot be associated with OSI model a) A structured way to discuss and easier update system components b) One layer may duplicate lower layer functionality c) Functionality at one layer no way requires information from another layer d) None of the mentioned

Functionality at one layer no way requires information from another layer Explanation: One layer may use the information from another layer Ex: time stamp value.

Communication between a computer and a keyboard involves ______________ transmission a) Automatic b) Half-duplex c) Full-duplex d) Simplex

Simplex Explanation: Data flows in single direction.

The physical layer concerns with a) bit-by-bit delivery p) process to process delivery c) application to application delivery d) none of the mentioned

bit-by-bit delivery

In asynchronous serial communication the physical layer provides a) start and stop signaling b) flow control c) both start & stop signaling and flow control d) none of the mentioned

both start & stop signaling and flow control

Communication channel is shared by all the machines on the network in a) broadcast network b) unicast network c) multicast network d) none of the mentioned

broadcast network

When 2 or more bits in a data unit has been changed during the transmission, the error is called a) random error b) burst error c) inverted error d) none of the mentioned

burst error

Which one of the following tasks is not done by data link layer? a) framing b) error control c) flow control d) channel coding

channel coding

Which one of the following computer networks is built on the top of another network? a) prior network b) chief network c) prime network d) overlay network

overlay network

Bluetooth is an example of a) personal area network b) local area network c) virtual private network d) none of the mentioned

personal area network

Transmission data rate is decided by a) network layer b) physical layer c) data link layer d) transport layer

physical layer

The portion of physical layer that interfaces with the media access control sublayer is called a) physical signaling sublayer b) physical data sublayer c) physical address sublayer d) none of the mentioned

physical signaling sublayer

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called a) piggybacking b) cyclic redundancy check c) fletcher's checksum d) none of the mentioned

piggybacking

A _____ is a TCP name for a transport service access point. a) port b) pipe c) node d) none of the mentioned

port

Which address identifies a process on a host? a) physical address b) logical address c) port address d) specific address

port address

TCP/IP model was developed _____ the OSI model. a) prior to b) after c) simultaneous to d) none of the mentioned

prior to

Transport layer protocols deals with a) application to application communication b) process to process communication c) node to node communication d) none of the mentioned

process to process communication

A list of protocols used by a system, one protocol per layer, is called a) protocol architecture b) protocol stack c) protocol suit d) none of the mentioned

protocol stack

A __________ is a device that forwards packets between networks by processing the routing information included in the packet. a) bridge b) firewall c) router d) all of the mentioned

router

TCP/IP model does not have ______ layer but OSI model have this layer. a) session layer b) transport layer c) application layer d) None of the mentioned

session layer

An endpoint of an inter-process communication flow across a computer network is called a) socket b) pipe c) port d) none of the mentioned

socket

Which layer is responsible for process to process delivery? a) network layer b) transport layer c) session layer d) data link layer

transport layer

Which layer links the network support layers and user support layers a) session layer b) data link layer c) transport layer d) network layer

transport layer Explanation: Physical, data link and network layers are network support layers and session, presentation and application layers are user support layers.

Which one of the following extends a private network across public networks? a) local area network b) virtual private network c) enterprise private network d) storage area network

virtual private network

Which of this is not a network edge device? a) PC b) Smartphones c) Servers d) Switch

Switch Explanation: Network edge devices refer to host systems, which can host applications like web browser.

3. The structure or format of data is called a) Syntax b) Semantics c) Struct d) None of the mentioned

Syntax Explanation: Semantics defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation.

Expand WAN a) World area network b) Wide area network c) Web area network d) None of the mentioned

Wide area network

Which one of the following is the multiple access protocol for channel access control? a) CSMA/CD b) CSMA/CA c) Both CSMA/CD & CSMA/CA d) None of the mentioned

Both CSMA/CD & CSMA/CA

HFC contains a) Fiber cable b) Coaxial cable c) Both Fiber cable and Coaxial cable d) None of the mentioned

Both Fiber cable and Coaxial cable

This layer is an addition to OSI model when compared with TCP IP model a) Application layer b) Presentation layer c) Session layer d) Both Session and Presentation layer

Both Session and Presentation layer

Which one of the following is a transport layer protocol used in networking? a) TCP b) UDP c) Both TCP and UDP d) None of the mentioned

Both TCP and UDP

These factors affect transmission rate in DSL a) The gauge of the twisted-pair line b) Degree of electrical interference c) Shadow fading d) Both The gauge of the twisted-pair line and Degree of electrical interference

Both The gauge of the twisted-pair line and Degree of electrical interference Explanation: Because DSL is made of twisted wire copper pair.

The following term is not associated with DSL a) DSLAM b) CO c) Splitter d) CMTS

CMTS Explanation: Cable modem termination system is used in cable internet access.

The function of DSLAM is a) Convert analog signals into digital signals b) Convert digital signals into analog signals c) Amplify digital signals d) None of the mentioned

Convert analog signals into digital signals Explanation: The DSLAM located in telco's Central Office does this function.

The _______ is the physical path over which a message travels a) Path b) Medium c) Protocol d) Route

Medium Explanation: Message travel from sender to receiver via a medium using a protocol.

Three or more devices share a link in ________ connection a) Unipoint b) Multipoint c) Point to point d) None of the mentioned

Multipoint

A set of rules that governs data communication: a) Protocols b) Standards c) RFCs d) None of the mentioned

Protocols

The IETF standards documents are called a) RFC b) RCF c) ID d) None of the mentioned

RFC Explanation: Request for Comments.

In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______ a) Added b) Removed c) Rearranged d) None of the mentioned

Removed

Star Band provides a) FTTH internet access b) Cable access c) Telephone access d) Satellite access

Satellite access

Delimiting and synchronization of data exchange is provided by a) Application layer b) Session layer c) Transport layer d) Link layer

Session layer

In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B is a) Application layer b) Transport layer c) Link layer d) Session layer

Session layer

Two devices are in network if a) a process in one device is able to exchange information with a process in another device b) a process is running on both devices c) PIDs of the processes running of different devices are same d) none of the mentioned

a process in one device is able to exchange information with a process in another device

User datagram protocol is called connectionless because a) all UDP packets are treated independently by transport layer b) it sends data as a stream of related packets c) it is received in the same order as sent order d) none of the mentioned

all UDP packets are treated independently by transport layer

Header of a frame generally contains a) synchronization bytes b) addresses c) frame identifier d) all of the mentioned

all of the mentioned

In computer network nodes are a) the computer that originates the data b) the computer that routes the data c) the computer that terminates the data d) all of the mentioned

all of the mentioned

The physical layer is responsible for a) line coding b) channel coding c) modulation d) all of the mentioned

all of the mentioned

Transmission control protocol is a) connection-oriented protocol b) uses a three-way handshake to establish a connection c) receives data from application as a single stream d) all of the mentioned

all of the mentioned

Which address is used in an internet employing the TCP/IP protocols? a) physical address and logical address b) port address c) specific address d) all of the mentioned

all of the mentioned

Which one of the following is a data link protocol? a) ethernet b) point to point protocol c) hdlc d) all of the mentioned

all of the mentioned

Wireless transmission can be done via a) radio waves b) microwaves c) infrared d) all of the mentioned

all of the mentioned

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

all of the mentioned

Which layer provides the services to user? a) application layer b) session layer c) presentation layer d) none of the mentioned

application layer

CRC stands for a) cyclic redundancy check b) code repeat check c) code redundancy check d) cyclic repeat check

cyclic redundancy check

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

data link layer

Which one of the following is a version of UDP with congestion control? a) datagram congestion control protocol b) stream control transmission protocol c) structured stream transport d) none of the mentioned

datagram congestion control protocol

Bits can be sent over guided and unguided media as analog signal by a) digital modulation b) amplitude modulation c) frequency modulation d) phase modulation

digital modulation

When collection of various computers seems a single coherent system to its client, then it is called a) computer network b) distributed system c) networking system d) none of the mentioned

distributed system

Network congestion occurs a) in case of traffic overloading b) when a system terminates c) when connection between two nodes terminates d) none of the mentioned

in case of traffic overloading

Automatic repeat request error management mechanism is provided by a) logical link control sublayer b) media access control sublayer c) network interface control sublayer d) none of the mentioned

logical link control sublayer

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) none of the mentioned

media access control sublayer

A single channel is shared by multiple signals by a) analog modulation b) digital modulation c) multiplexing d) none of the mentioned

multiplexing

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

network layer

Transport layer aggregates data from different applications into a single stream before passing it to a) network layer b) data link layer c) application layer d) physical layer

network layer

OSI stands for a) open system interconnection b) operating system interface c) optical service implementation d) none of the mentioned

open system interconnection

Which transmission media has the highest transmission speed in a network? a) coaxial cable b) twisted pair cable c) optical fiber d) electrical cable

optical fiber