Data Communications and computer Networks Mid - I, September - 2014

1.Data exchange takes place in ____ phase of circuit-switched network
  • Setup
  • Data transfer
  • Tear down
  • None of the above
Answer: B
2.In burst error, _____ data bits are changed.
  • 1
  • 2
  • 2 or more
  • 0
Answer: C
3._______ bit checksum is used by internet
  • 4-bit
  • 8-bit
  • 16-bit
  • 32-bit
Answer: C
4.NRM used for
  • Point-to-point links
  • Multi-point links
  • Both A and B
  • None of the above
Answer: C
5.Number of channels used for transmission in CDMA
  • 1
  • 2
  • 3
  • 4
Answer: A
6.The layer responsible for delivery of a packet from source to destination across multiple links is
  • Transport
  • Network
  • Data link
  • Physical
Answer: B
7.Which of the following protocol supports newer applications?
  • IP
  • TCP
  • UDP
  • SCTP
Answer: D
8.In which topology a dedicated point-to-point link between each and every devices?
  • Star
  • Bus
  • Mesh
  • Ring
Answer: C
9.Multiplexing offers ______________
  • Anti-jamming
  • Efficiency
  • Spreading
  • Privacy
Answer: B
10.Identify an analog multiplexing technique that combines analog signals
  • TDM
  • FDM
  • WDM
  • none of the above
Answer: B
11.________________refers to the structure or format of the data, meaning the order in which they are presented.
Answer: Syntax
12.RFC stands ____________________.
Answer: Request for Comment
13.____________ refers to the physical or logical arrangement of a network.
Answer: Topology
14.At each layer, ______________ or possibly ________________ can be added to the data unit
Answer: Header, trailer
15.The physical address, also known as the ___________________.
Answer: Link address
16.A _________________ is a composite analog signal with an infinite bandwidth.
Answer: Digital signal
17.According to _____________________ any composite signal is a combination of simplesine waves with different frequencies, amplitudes, and phases.
Answer: Fourier analysis
18.SONET stands for ____________.
Answer: Synchronous Optical Network
19._____________ extend the length of the links.
Answer: Regenerators
20._____________ is a cell network in which each cell has a fixed size of 53 bytes.
Answer: ATM network