In this blog you will find the correct answer of the Coursera quiz Fundamentals of Network Communication Coursera Week 3 Quiz mixsaver always try to brings best blogs and best coupon codes
 

Week- 3

Practice Assessment – Socket API & Digital Transmissions

 

1. Which of the following applications would you select TCP protocol for?

 

  • File transfer
  • Web browsing
  • Domain name service
  • None of the above

2. In BSD socket API, which type of socket is used to create a TCP socket?

 

  • SOCK_STREAM
  • SOCK_RAW
  • SOCK_DGRAM
  • None of the above

3. In BSD socket API, which type of socket is used to create a UDP socket?

 

  • SOCK_STREAM
  • SOCK_DGRAM
  • SOCK_RAW
  • None of the above

4. In BSD socket API, which system call is used to assign a network address to the socket?

 

  • listen()
  • connect()
  • None of the above
  • bind()

5. In BSD socket API, if a client knows the server name but not server’s network address, what system call should the client use to get server’s network address?

 

  • Connect()
  • gethostbyname()
  • gettimeofday()
  • None of the above

6. In a transmission system, which of the following statement is true for a receiver

 

  • Receives energy from medium
  • Converts information into signal suitable for transmission
  • Converts received signal into a form suitable for delivery to user
  • All of the above

7. In digital transmission, long distance digital communications require the use of a generator to recover original data sequence and re-transmits on next segment

 

  • True
  • False

8. In twisted pair, a category 5 UTP cable can support a data rate of up to 16MHz

 

  • True
  • False

9. Which of the following statement is true for optical fiber

 

  • Plentiful bandwidth for new services
  • Dominates long distance transmission
  • Distance less of a cost factor in communications
  • All of the above

10. Which of the following are advantages of optical fiber

 

  • No corrosion
  • Extremely low bandwidth
  • Wavelength dependency
  • Noise immunity

 

 

Graded Assessment – Socket API & Digital Transmissions

 

1. In BSD socket API, which call is usually used for transmitting data in the connectionless mode?

 

  • accept()
  • connect()
  • sendto()
  • None of the above

2. Which of following statement about TCP/UDP sockets is wrong?

 

  • TCP socket is stream oriented
  • UDP socket is block oriented
  • TCP is faster than UDP
  • All of the above

3. Which of following are commonly used as digital communication medium?

 

  • Optical fiber
  • All of the above
  • Coaxial cable
  • Twisted pair

4. Consider a network link that has distance of 100 meters, and signal traverses at the speed of light in cable 2.5 x 10^8 meters per second. The link has transmission bandwidth of 100 megabits/second (100 x 10^6 bits per second). The packet size is 400 bits. What is the signal propagation delay?

 

  • 4 x 10^-7 seconds
  • 4 x 10^-9 seconds
  • 4 x 10^-6 seconds
  • None of the above

5. Consider a network link that has distance of 100 meters, and signal traverses at the speed of light in cable 2.5 x 10^8 meters per second. The link has transmission bandwidth of 100 megabits/second (100 x 10^6 bits per second). The packet size is 400 bits. What is the packet transmission delay?

 

  • None of the above
  • 4 x 10^-9 seconds
  • 4 x 10^-6 seconds
  • 4 x 10^-7 seconds

6. An API allows application programs to access certain resources through a predefined interface?

 

  • True
  • False

7. In transport protocol, which of the following statements is true for User Datagram Protocol

 

  • It enables best-effort connectionless transfer of individual block of information
  • It enables connection-oriented reliable transfer of individual block of information
  • It enables best-effort connectionless reliable transfer of a stream of bytes
  • None of the above

8. Which of the following sentences are true for connectionless stream mode of service

 

  • No setup overhead and delay
  • Destination address with each block
  • Send/receive to/from multiple peer processes
  • Multiple write/read between peer processes

9. In transmission delay, in order to reduce the number of bits in a message we use data compression

 

  • True
  • False

10. Which of the following is true of data compression algorithms

 

  • Represent the information using fewer bits
  • Recover information approximately
  • Modify data headers
  • Recover original information exactly

 

 

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