Network interview questions – page 4

Many low-shaped channels are interwoven into one high-speed transmission by

1. Frequency-division multiplexer
2. Time-division multiplexer
3. Both (a) and (b)
4. None of these

Which of the following is the difference between a multiplexer and a statistical multiplexer?

1. Multiplexer use X.25 protocol, while statistical multiplexers use the Alpha protocol
2. Statistical multiplexers need buffers while multiplexers do not need buffers
3. Multiplexers often waste the output link capacity while statistical multiplexers oppose its use
4. Multiplexers use Time Division multiplexing (TDM) while statistical multiplexers uses Frequency division multiplexing (FDM)

The synchronous modems are more costly than the asynchronous modems because

1. They operate with a larger bandwidth
2. They produce large volume of data
3. They contain clock recovery circuits
4. They transmit the data with stop and start bits

To connect a computer with a device in the same room, you might be likely to use

1. A ground station
2. A dedicated line
3. A coaxial cable
4. All of the above

Which of the following is the fastest media of data transfer?

1. Fiber optic
2. Co-axial cable
3. Untwisted wire
4. Telephone lines

Computer Network is

1. Sharing of resources and information
2. Collection of hardware components and computers
3. Interconnected by communication channels
4. All of the above

Full form of NIC

1. National Interface Card
2. Network Inter Connection
3. Network International Connection
4. Network Interface Card

We can insert a ___ in USB port of a system unit.

1. CD
2. DVD
3. Floppy
4. Pen drive

The speed at which the monitor accepts data is called

1. Response time
2. Interlacing
3. Bandwidth
4. Scanning

The ground station in VSAT communication is called

1. Hub
2. HTTP
3. Multiplexer
4. Repeater

____ unit(s) in a single bus structure communicate at a time.

1. One
2. Two
3. Three
4. Four

In a ___ topology, if there are n devices in a network, each device has n-1 ports for cable.

1. Bus
2. Mesh
3. Ring
4. Star

Where does bridge operate in OSI model?

1. Application layer
2. Data link layer
3. Physical layer
4. Both a and b

In a ring topology, the computer in possession of the ____ can transmit data.

1. Pocket
2. Access method
3. Data
4. Token

The layer is the layer closest to transmission medium

1. Data link
2. Transport
3. Network
4. Physical

E- commerce is not suitable for

1. Sale/purchase of mobile phones
2. Sale/Purchase of branded clothes
3. Sale/Purchase of expensive jewellery and antiques
4. Online job searching

____ is used to refer amount of things.

1. Number representation
2. Number algorithms
3. Number system
4. Number words

Which of the following is required to communication between two computers?

1. Communication hardware
2. Communications software
3. Protocol
4. All of above including access to transmission medium

If you use either Telnet or FTP, which is the highest layer you are using to transmit data?

1. Application
2. Session
3. Presentation
4. Transport

Error detection at the data link level is achieved by

1. Equalization
2. Bit stuffing
3. Hamming codes
4. Cyclic redundancy codes

Which of the following techniques is used for allocating capacity on a satellite channel using fixed-assignment FDM?

1. Frequency-shift keying
2. Frequency modulation
3. Frequency-division multiple access
4. Amplitude modulation

The connection between your computer at home and your local ISP is called _____

1. The backbone
2. The home page
3. The home stretch
4. The last mile

Demodulation is the process of

1. Dividing the high-speed signals into frequency bands
2. Converting digital signals to analog signals
3. Converting analog signals to digital signals
4. Combining many low speed channels into one high speed channel

Bluetooth is an example of

1. Wide area network
2. Virtual private network
3. Local area network
4. Personal area network

The application layer of the OSI model is

1. Four layer
2. Five layer
3. Six layer
4. Seven layer

FDDI is

1. Bus based network
2. Mesh network
3. Star network
4. Ring network

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

1. TFTP
2. TELNET
3. FTP
4. RARP

Which of the following is not a disadvantage of wireless LAN?

1. Slower data transmission
2. Higher error rate
3. Interference of transmissions from different computers
4. All of the above

Networks are monitored by security personnel and supervised by _____ who set(s) up accounts and passwords for authorized network users.

1. Password administrators
2. Network administrators
3. The government
4. IT managers

______ is a technique that is used to send more than one call over a single line.

1. Digital transmission
2. Infrared transmission
3. Digitizing
4. Multiplexing