To set up a bulletin board system you need

a smart modem with auto-answer capabilities

The difference between a multiplexer and a statistical multiplexer is

Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

Statistical multiplexers need buffers while multiplexers do not need buffers

Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

Multiplexers often waste the output link capacity while statistical multiplexers optimize its use

Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)

is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

is always less expensive than flat-rate service

is less expensive than flat-rate service only when the number of calls is large and the duration of each is short

is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

is never less expensive than flat-rate service

When a group of computers is connected together in a small area without the help of telephone lines, it is called

Remote communication network (RCN)

What function does a serial interface perform in data communication?

Decodes incoming signals into computer data

Converts serial data into audio signals

Converts analog signals into digital signals

Converts parallel data into a stream of bits

Decodes incoming signals into computer data

What can cause a problem with communication with a client by name but not by IP address?

Static files such as an LMHOSTS file or a DNS database

macro programming of microcomputers

HMP (Host Monitoring Protocol) is:

a protocol that handles error and control messages

a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address

a TCP/IP high level protocol for transferring files from one machine to another.

a protocol used to monitor computers

a protocol that handles error and control messages

Modulation is the process of

Multiplexing various signals into high speed line signals

converting analog signals to digital signals

converting digital signals to analog signals

Multiplexing various signals into high speed line signals

a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors in detected

an error-detecting code based on a summation operation performed on the bits to be checked.

a check bit appended to an array of binary digits to make the sum of all the binary digits.

a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors in detected

the ratio of the number of data units in error to the total number of data units

Terminals are required for

realtime, batch processing, and timesharing

realtime, timesharing, and distributed processing

realtime, distributed processing, and manager inquiry

realtime, timesharing, and message switching

The modern enterprise is interconnected internally and externally by the Internet, intranets, and other networks. Select the best fit for answer:

Business applications of telecommunications

415 + Mcqs in Networking in Computer Science Page 5 McqOptions

201.	A medium access control technique for multiple access transmission media is
A.	Aloha
B.	Amplitude
C.	Angle modulation
D.	Attenuation
Answer» B. Amplitude

202.	Which of the following communications lines is best suited to interactive processing applications?
A.	narrowband channels
B.	simplex lines
C.	full-duplex lines
D.	mixed band channels
Answer» D. mixed band channels

203.	Which utility is useful for troubleshooting NetBIOS name resolution problems?
A.	NBTSTAT
B.	Netstat
C.	PING
D.	Hostname
Answer» B. Netstat

204.	A group of 2m - 1 routers are interconnected in a centralized binary tree, with router at each tree node. Router I communicate with router J by sending a message to the root of the tree. The root then sends the message back down to J. Then find the mean router-router path length.
A.	2 (m - 2)
B.	2 (2m - 1)
C.	m - 1
D.	(2m - l)/mJ
Answer» B. 2 (2m - 1)

205.	Which of the following divides the high speed signal into frequency bands?
A.	t-switch
B.	modem
C.	frequency-division multiplexer
D.	time-division multiplexer
Answer» D. time-division multiplexer

206.	Which of the following network access standard is used for connecting stations to a packet-switched network?
A.	X.3
B.	X.21
C.	X.25
D.	X.75
Answer» D. X.75

207.	Which IP address class has few hosts per network?
A.	D
B.	C
C.	B
D.	A
Answer» C. B

208.	To set up a bulletin board system you need
A.	a smart modem with auto-answer capabilities
B.	a telephone line
C.	a personal computer
D.	All of the above
Answer» E.

209.	The difference between a multiplexer and a statistical multiplexer is
A.	Statistical multiplexers need buffers while multiplexers do not need buffers
B.	Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
C.	Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
D.	Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
Answer» B. Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

210.	A WATS arrangement
A.	is always less expensive than flat-rate service
B.	is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
C.	is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
D.	is never less expensive than flat-rate service
Answer» C. is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

211.	When a group of computers is connected together in a small area without the help of telephone lines, it is called
A.	Remote communication network (RCN)
B.	Local area network(LAN)
C.	Wide area network (WAN)
D.	Value added network (VAN)
Answer» C. Wide area network (WAN)

212.	Which of the following communications modes support two-way traffic but in only one direction of a time?
A.	simplex
B.	half-duplex
C.	three-quarters duplex
D.	full-of the above
Answer» C. three-quarters duplex

214.	With an IP address starting at 200, you currently have 10 subnets. What subnet mask should you use to maximize the number of available hosts?
A.	192
B.	224
C.	240
D.	248
Answer» D. 248

216.	Error detection at a data link level is achieved by
A.	bit stuffing
B.	cyclic redundancy codes
C.	Hamming codes
D.	equalization
Answer» C. Hamming codes

219.	Devices on one network can communicate with devices on another network via a
A.	file server
B.	utility server
C.	printer server
D.	gateway
Answer» E.

213.	The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:
A.	modulation
B.	demodulation
C.	synchronizing
D.	synchronizing
Answer» C. synchronizing

215.	Which of the following files is used for NetBIOS name resolution?
A.	HOSTS
B.	LMHOSTS
C.	ARP
D.	FQDN
Answer» C. ARP

217.	What function does a serial interface perform in data communication?
A.	Converts serial data into audio signals
B.	Converts analog signals into digital signals
C.	Converts parallel data into a stream of bits
D.	Decodes incoming signals into computer data
Answer» D. Decodes incoming signals into computer data

218.	You are trying to decide which type of network you will use at your office, and you want the type that will provide communication and avoid collisions on the cable. Which of the following is the best choice?
A.	Token-Ring
B.	CSMA/CD
C.	Ethernet
D.	CSMA/CA
Answer» B. CSMA/CD

220.	Which of the following TCP/IP protocol is used for file transfer with minimal capability and minimal overhead?
A.	RARP
B.	FTP
C.	TFTP
D.	TELNET
Answer» D. TELNET

221.	What can cause a problem with communication with a client by name but not by IP address?
A.	The IP address
B.	Static files such as an LMHOSTS file or a DNS database
C.	Subnet mask
D.	The default gateway
Answer» C. Subnet mask

222.	You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?
A.	255.255.192.0
B.	255.255.224.0
C.	255.255.240.0
D.	255,255.248.0
Answer» E.

223.	Information systems with common hardware, software, and network standards that provide easy access for end users and their networked computer systems. Select the best fit for answer:
A.	TCP/IP
B.	Protocol
C.	Open Systems
D.	Internetwork processor
Answer» D. Internetwork processor

224.	Microprogramming is
A.	assembly language programming
B.	programming of minicomputers
C.	control unit programming
D.	macro programming of microcomputers
Answer» D. macro programming of microcomputers

225.	HMP (Host Monitoring Protocol) is:
A.	a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
B.	a TCP/IP high level protocol for transferring files from one machine to another.
C.	a protocol used to monitor computers
D.	a protocol that handles error and control messages
Answer» D. a protocol that handles error and control messages

Explore topic-wise MCQs in Computer Science.

A medium access control technique for multiple access transmission media is

Which of the following communications lines is best suited to interactive processing applications?

Which utility is useful for troubleshooting NetBIOS name resolution problems?

A group of 2m - 1 routers are interconnected in a centralized binary tree, with router at each tree node. Router I communicate with router J by sending a message to the root of the tree. The root then sends the message back down to J. Then find the mean router-router path length.

Which of the following divides the high speed signal into frequency bands?

Which of the following network access standard is used for connecting stations to a packet-switched network?

Which IP address class has few hosts per network?

To set up a bulletin board system you need

The difference between a multiplexer and a statistical multiplexer is

A WATS arrangement

When a group of computers is connected together in a small area without the help of telephone lines, it is called

Which of the following communications modes support two-way traffic but in only one direction of a time?

The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:

With an IP address starting at 200, you currently have 10 subnets. What subnet mask should you use to maximize the number of available hosts?

Which of the following files is used for NetBIOS name resolution?

Error detection at a data link level is achieved by

What function does a serial interface perform in data communication?

You are trying to decide which type of network you will use at your office, and you want the type that will provide communication and avoid collisions on the cable. Which of the following is the best choice?

Devices on one network can communicate with devices on another network via a

Which of the following TCP/IP protocol is used for file transfer with minimal capability and minimal overhead?

What can cause a problem with communication with a client by name but not by IP address?

You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

Information systems with common hardware, software, and network standards that provide easy access for end users and their networked computer systems. Select the best fit for answer:

Microprogramming is

HMP (Host Monitoring Protocol) is:

What OSI layer handles logical address to logical name resolution?

Data communications monitors available on the software market include

Modulation is the process of

Which of the following transmission systems provides the highest data rate to an individual device

A communications device that combines transmissions from several 1/ O devices into one line is a:

One important characteristic of the hub architecture of ARC-net is

Parity bit is

Networks that follow the 802.5 standard appear to be in a star topology but are actually operating in what type of topology?

The amount of uncertainty in a system of symbol is called

If the ASCII character H is sent and the character I is received, what type of error is this?

You are working with a network that is 172.16.0.0 and would like to have the maximum number of hosts per subnet. This assumes support for eight subnets. What subnet mask should you use?

Terminals are required for

The modern enterprise is interconnected internally and externally by the Internet, intranets, and other networks. Select the best fit for answer:

Which of the following conditions is used to transmit two packets over a medium at the same time?

For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters 'RS' stand for?

Which of the following connectivity devices is used to extend a network on a purely mechanical basis?

A teleprocessing system may consist of

A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.

What is the port number for POP3?

Different computers are connected to a LAN by a cable and a/an

Internet-like networks between a company and its business partners. Select the best fit for answer:

Which of the following is a voiceband channel?

What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end?

To avoid transmission errors, a check figure is calculated by the

226.	What OSI layer handles logical address to logical name resolution?
A.	Transport
B.	Physical
C.	Presentation
D.	Data Link
Answer» B. Physical

227.	Data communications monitors available on the software market include
A.	ENVIRON/1
B.	TOTAL
C.	BPL
D.	Telenet
Answer» B. TOTAL

228.	Modulation is the process of
A.	converting analog signals to digital signals
B.	converting digital signals to analog signals
C.	Multiplexing various signals into high speed line signals
D.	performing data encryption.
Answer» C. Multiplexing various signals into high speed line signals

229.	You have been contracted to install a windows NT network in an office that is located in a strip mall. The office is located next to the power plant of the building, so a UPS (uninterruptible power supply) has already been installed. What type of cable should you use for the network cabling? Choose the best answer.
A.	TI
B.	UTP
C.	Fiber-optic
D.	PSTN
Answer» E.

230.	Which of the following transmission systems provides the highest data rate to an individual device
A.	Computer bus
B.	Telephone lines
C.	Voice band modem
D.	leased lines
Answer» B. Telephone lines

231.	A communications device that combines transmissions from several 1/ O devices into one line is a:
A.	concentrator
B.	modifier
C.	multiplexer
D.	full-duplex line
Answer» D. full-duplex line

232.	One important characteristic of the hub architecture of ARC-net is
A.	directionalized transmission
B.	access control and addressing
C.	multiple virtual networks
D.	alternative routing
Answer» B. access control and addressing

233.	Parity bit is
A.	an error-detecting code based on a summation operation performed on the bits to be checked.
B.	a check bit appended to an array of binary digits to make the sum of all the binary digits.
C.	a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors in detected
D.	the ratio of the number of data units in error to the total number of data units
Answer» C. a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors in detected

234.	Networks that follow the 802.5 standard appear to be in a star topology but are actually operating in what type of topology?
A.	Linear bus
B.	Modified star
C.	Modified ring
D.	Ring
Answer» E.

235.	The amount of uncertainty in a system of symbol is called
A.	Bandwidth
B.	Entropy
C.	loss
D.	Quantum
Answer» C. loss