COMPUTER NETWORKING

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TRANSPORT LAYER

INTRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A port address in UDP is ____ bits long
A
8
B
16
C
32
D
none of the above
Explanation: 

Detailed explanation-1: -A port number is a 16-bit integer ranging from 0 to 65535. A port number uniquely identifies this application to the protocol underlying this TCP/IP host (TCP, UDP, or IP).

Detailed explanation-2: -UDP port numbers can be between 0 and 65, 535. Length – Specifies the number of bytes comprising the UDP header and the UDP payload data. The limit for the UDP length field is determined by the underlying IP protocol used to transmit the data.

Detailed explanation-3: -The size of a usual UDP header is 8 bytes; the data that is added with the header can be theoretically 65, 535 (practically 65, 507) bytes long. A UDP header is quite small when compared to a TCP header; it has just four common fields: Source Port, Destination Port, Packet Length, and Checksum.

Detailed explanation-4: -The UDP header has a fixed length of 8 bytes.

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