Basic CS [3i Infotech Placement]: Sample Questions 12 - 14 of 243

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Question 12

Basic CS
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Describe in Detail

Essay▾

What is mail Gateway?

Explanation

Structure Using Mail Getway
  • The mail gateway machine handles connections between networks running different protocols- allowing mail to be sent from one network to another.
  • Example a mail gateway can connect a TCP/IP network to a system network architecture protocol network.
  • Performs a protocol translation between different electronic mail delivery protocols.
  • The gateway system will handle mail with address for which “send mail” cannot find a recipient in domain.
  • If a mail gateway exits- “send mail” uses the gateway to send and receive mail outside domain.

Question 13

Basic CS
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Write in Short

Short Answer▾

What is the difference between TFTP and FTP application layer protocols?

Explanation

Difference between TFTP and FTP
TFTPFTP
Not connection orientedConnection oriented.
Does not use error checking.Uses error checking and flow control
Uses UDP as transport protocol.Uses TCP as transport protocol
Authentication is not needed.Authentication is mandatory
Getting and putting application main concernProvides more control and data connection aspects.

Question 14

Write in Short

Short Answer▾

What is the precedence order from high to low, of the symbols

Explanation

  • When two operators share an operand the operator with the higher precedence goes first.
  • is treated as ,
  • is treated as since multiplication has a higher precedence than addition.
  • Symbols arranged in precedence order are.

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