Basic CS-Networks [3i Infotech Placement]: Sample Questions 70 - 71 of 90

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Question 70


Write in Short

Short Answer▾

What is multi-homed-host?


  • Host with multiple network interfaces requiring multiple IP addresses is called multi-homed host.
  • Physically connected to multiple data links on the same or different networks.
  • Using stream control transmission protocol (SCTP) , multi-homing allows single SCTP endpoint to support multiple IP addresses allowing a session to survive a network failure.
  • In multi-homing, host name information is configured to allow all Internet addresses for a host to resolve to the same name- thus host has an official name and a number of aliases for the same host.

Question 71


Describe in Detail


What is the minimum and maximum length of the header in the TCP segment and IP datagram?


  • The header should have a minimum length of 20 bytes and can have a maximum length of 60 bytes.

Header of TCP segment

  • TCP provides reliable data delivery with the help of sequencing and checksums.
  • 32 Bit number is used for byte level numbering of TCP segments.
  • Data Offset field- 4 Bit field shows the number of 32 Bit words in the header
  • The minimum size header is 5 words.

Header of IP diagram

  • Packet format of data recognized by IP is called IP datagram.
  • Consists of two components: the header and data, which need to be transmitted.
  • The size of the Header Length or the IHL field is 4 bits- specifies the length of header, which can range from 20 to 60 bytes.
  • IP datagram has a fixed header size except for the IP Options field- which can be 20 - 60 bytes.

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