Basic CS-Networks [3i Infotech Placement]: Sample Questions 6 - 7 of 90

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Question 6

Networks
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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 7

Networks
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Describe in Detail

Essay▾

What is the function of a community string?

Explanation

  • Community string is like a user id or password-provides authentication.
  • Sent along with each Simple network management protocol (SNMP) get-request- allowing access to a remote router՚s or other device՚s statics.
  • Only if community string is correct, the device responds with the requested information.
  • Used only by devices which support SNMOv1 and SNMPv2c protocol.

Types of community string:

  • SNMP read-only community string
    • Enables a remote device to retrieve “read-only” information from a device.
    • Intermapper uses information from devices on its maps.
  • SNMP read-write community string:
    • Allows information request from a device and modifying settings on that device.
    • Intermapper does not use the read-write community string- never modifies any settings on its devices.
  • SNMP trap community string:
    • When a device sends SNMP Traps to Intermapper.
    • Intermapper accepts any SNMP Trap community string.

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