3i Infotech Papers: Sample Questions 278 - 279 of 1245

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Question number: 278

» Operating System » Unix

Short Answer Question▾

Write in Short

What is major difference between the Historic Unix and the new BSD release of Unix System V in terms of Memory Management?


  • Historic Unix uses swapping:

    • Entire process is transferred to the main memory the swap device.

  • The Unix system v uses demand paging:

    • The part of the process is moved to the main memory.

    • Unix uses one swap device and Unix system v allow multiple swap devices.

Question number: 279

» Basic CS » Networks

Essay Question▾

Describe in Detail

What are the two types of transmission technology available?


Bellow the two types of transmission technology:

  1. Broadcast network

  2. Point to point network

Two types of transmission technology

Two Types of Transmission Technology

Two types of transmission technology

Broadcast network:

  • Single communication channel is shared or used by all the machines on the network.

  • Short messages called packets sent by any machine are received by all the others.

  • Broadcast systems also support transmission to a subset of the machines known as multicasting.

  • Upon receiving a packet, a machine checks the address field.

  • If the packet is addressed to it than the packet is processed, otherwise the packet is ignored.

Point to point network:

  • Such networks consist of many connections between individual pairs of machines.

  • Packets on these networks traverse all intermediate computers before they reach the desired computer.

  • Packets can take different routes if a particular route is congested.

  • Packets can follow multiple routes of different lengths.

  • Routing algorithms are very important in the point to point networks.