Question

Which port number to application name is incorrect?
O SMTP - TCP Port 25
O SQL Server - TCP Port 42
O DNS - TCP Port 53
HTTP - TCP Port 80​

Answer 1

Answer:

sql server - TCP port 42

correct answer : sql server - TCP port 1433

more information about ports :

• multiple users process on a machines may use TCP or UDP at the same time . there is need for a mechanism to uniquely identify the data packets associated with each packets

port numbers :

port 10

process 1 |

port 20 |

process 2. | ‹------------ an incomming packets

port 30 |

process 3 |

how is done :

• both TCP and UDP 16-bits port numbers
• different applications are identifided by diffirent port numbers
• port nymbers are stored in headers of TCP or UDP packets

how are the port number assigned ?

• port numbers from 1 to 1023 are reserved for well known ports
• number beyound this and up to 65535 used as ephermal ports numbers

more information about sql : sql stand for structured query language . this language is made for storing data in database