Basic CS-Networks [3i Infotech Placement]: Sample Questions 19 - 20 of 90

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Question 19


Write in Short

Short Answer▾

What MAU?


Understanding of MAU
  • A multistation access unit or Ethernet media attachment unit are both abbreviated as MAU.
  • Multistation access unit is hub or concentrator connecting a group of computers in a star topology while retaining the logical ring structure- actual wiring is in star topology with stations connected in a star pattern to a central MAU.
  • MAU provides 8 or 16 ports for connecting stations to the “ring” - includes one ring-out and one ring-in connector.
  • Advantage from actual ring is that- if one computer fails, the MSAU can bypass it and the “ring” will remain intact.

Question 20


Describe in Detail


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


Classes of IP Address in Networking
  • Internet address, short for Internet Protocol address, is identifying number for network hardware.
  • Allows a device to communicate with other devices over an IP-based network like the internet.
  • Networks using the TCP/IP protocol route messages based on the IP address of the destination.
  • IP addresses provide identity to the networked devices.

Below the Range of Addresses in the Classes of Internet Addresses

  • Class A 0.0. 0.0 - 127.255. 255.255
    • Class “A” network- first eight bits are network part of the address, remaining being the host part.
    • 128 possible class “A” networks.
  • Class B 128.0. 0.0 - 191.255. 255.255
    • A Class “B” network, first 16 bits are network part of the address.
    • First bit set to 1 and second bit set to 0.
    • 16,384 possible Class B networks.
  • Class C 192.0. 0.0 - 223.255. 255.255
    • First two bits are set to 1, and the third bit is set to 0.
    • 24 bits form the network address and remainder host address.
    • 2 million possible Class C networks.
  • Class D 224.0. 0.0 - 239.255. 255.255
    • Class “D” addresses used for multicasting applications.
    • Not used for “normal” networking operations.
    • First three bits set to “1” and their fourth bit set to “0” .
    • No host addresses within the Class “D” address space.
    • All the hosts within a group share the group՚s IP address for receiver purposes.
  • Class E 240.0. 0.0 - 247.255. 255.255
    • Networks are defined by the first four network address bits as 1.
    • This class is reserved; its usage was never defined.
    • Network implementations discard these addresses illegal or undefined.

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