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

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Question 19

Networks
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Write in Short

Short Answer▾

What MAU?

Explanation

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

Networks
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Describe in Detail

Essay▾

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

Explanation

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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