TCS Papers: Sample Questions 238 - 239 of 502

Examrace Placement Series prepares you for the toughest placement exams to top companies.

Question number: 238

» Basic CS » Networks

Essay Question▾

Describe in Detail

What is FDM?

Explanation

  • FDM is an analog technique used when the bandwidth of a link is greater than the combined bandwidths of the signals to be transmitted.

  • Frequency Division Multiplexing uses frequencies to combine many streams of data for sending signals over a medium for communication purpose.

  • Carries frequency to each data stream and later combines modulated frequencies to get complete transmission.

  • Television Transmitters use FDM to broadcast many channels at the same time.

Image shows the FDM

Image Shows the FDM

Given the image is define the Frequency Division Multiplexing (FDM)

Question number: 239

» Basic CS » Networks

Essay Question▾

Describe in Detail

What is the range of addresses in the classes of internet addresses?

Explanation

  • With an IPv4 IP address, there are five classes of available IP ranges: Class A, Class B, Class C, Class D and Class E, while only A, B, and C are commonly used.

  • Each class allows for a range of valid IP addresses, shown in the following table.

    Table of the range of valid IP addresses

    Table of the range of valid IP addresses

    Class

    Address Range

    Supports

    Class A

    Supports millions hosts on each of networks.

    Class B

    Supports hosts on each of networks.

    Class C

    Supports hosts on each of million networks.

    Class D

    Reserved for multicast groups.

    Class E

    Reserved for future use, or research and development purposes.

  • Ranges . x. x. x are reserved for the local host.

  • For example, is the loopback address.

  • Range broadcast to all hosts on the local network.