Port Number

WHAT IS A PORT NUMBER

1. A PORT IS NOT PHYSICAL CONNECTION IT IS A LOGICAL CONNECTION THAT IS USED BY PROGRAMS AND SERVICES TO EXCHANGE INFORMATION.

2. IT IS SPECIFICALLY DETERMINE WHICH PROGRAMOR SERVICES ON A COMPUTER AND SERVER THAT IS GOING TO BE USED.

FOR EXAMPLE : WEBPAGE , EMAIL , FTP

3. PORT IS A UNIQUE NUMBER THAT INDENTIFIES THEM. 0-65535

COMMON PORT NO 80,443 IS WEBPAGE(HTTP AND HTTPS AND FTP IS 21.

4. A PORT IS ALWAYS ASSOCIATED WITH AN IP ADDRESS.

FOR EXAMPLE IP ADDRESS IS 192.68.1.1 AND PORT NO IS 21

SO COMBINE THE IP AND PORT IS 192.168.1.1:21

5. PORT NO 0-65535 RANG THE FOR ASSIGNED BY IANA (INTERNET ASSIGNED NUMBER ATHOUROTY)

PORT NO ARE BROKEN DOWN 3 CATEGORIES

1. PORT NUMBER 0-1023 IS CALLED SYSTEM AND WELL-KNOWN PORTS.

EXAMPLE : 80 , 25 , 443 , 21.

2. PORT NUMBER 1024-49151 ARE CALLED USER OR REGISTERED PORTS.

THEY ARE PORT THATCAN BE REGISTERED BY COMPANIES OR DEVOLPER FOR A PARTICULAR SERVICE.

EXAMPLE : 1102 ADOBE SERVICE AND 1527 ORACLE AND 1433 MICROSOFT SQL SERVER.

3. PORT NUMBER 49152 ARE CALLED DYNAMIC AND PRIVATE PORTS.

THEY ARE CLIENT-SIDE PORT THAT ARE FREE TO USE.

THESE ARE PORTS THAT YOU COMPUTER ASSIGNS TEMPORAILY TO ITSELF DURING A SESSION.

________________I

IMPORTANT PROTOCOLS AND HIS PORT NUMBERS

1. TCP/IP PORT NO : 3360

2. HTTP PORT NO : 80

3. SMTP PORT NO: 25

4. PPP PORT NO : 110

5. FTP PORT NO : 21

6. TELNET PORT NO : 23

7 . IMAP PORT NO : 143

8. DNS PORT NO : 53

9. SSL PORT NO : 443

10. HTTPS PORT NO : 443

11. SSH PORT NO : 22

_____________

Comments

TCP/IP MODEL

HISTORY OF TCP/IP MODEL THE TCP/IP MODEL WAS DEVELOPED BY VINT CERF AND BOB KAHN IN THE 1970S. THEY WERE BOTH WORKING AT THE DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA) AT THE TIME. Vint Cerf And Bob Kahn CERF AND KAHN WERE TASKED WITH DEVELOPING A NEW NETWORK PROTOCOL THAT WOULD BE MORE RELIABLE AND EFFICIENT THAN THE EXISTING PROTOCOLS. THEY CAME UP WITH THE IDEA OF USING A LAYERED APPROACH, WHICH WOULD ALLOW EACH LAYER TO FOCUS ON A SPECIFIC TASK. THIS LED TO THE DEVELOPMENT OF THE TCP/IP MODEL, WHICH IS STILL THE BASIS FOR HOW DATA IS TRANSMITTED OVER THE INTERNET TODAY. CERF AND KAHN ARE OFTEN REFERRED TO AS THE "FATHERS OF THE INTERNET" FOR THEIR WORK ON THE TCP/IP MODEL. THEY WERE INDUCTED INTO THE NATIONAL INVENTORS HALL OF FAME IN 2004 FOR THEIR CONTRIBUTIONS TO THE DEVELOPMENT OF THE INTERNET. HERE ARE SOME OTHER NOTABLE PEOPLE WHO CONTRIBUTED TO THE DEVELOPMENT OF THE TCP/IP MODEL: JON POSTEL: POSTEL WAS THE FIRST CHAIRMAN OF THE INTERNET ENGINEERI...

About Me Information

HELLO FRIENDS, I HOPE YOU ALL ARE DOING WELL. I AM MAKING THIS BLOG FOR THE INFORMATION OF NETWORKING ABOUT. IN THIS BLOG WE WILL READ CCNA (200-301) AND ITS RELATED AND NETWORK RELATED INFORMATION. MY NAME IS ABDUL MANAN JAVED MANJ MY AGE IS 21 YEAR I AM STUDED ABOUT NETWORK TECHNOLOGY EMAIL ID : mananrajpoot449@gmail.com CONTACT NO : +923486777628 ADDRESS : ISLAMABAD,G7,KHADA MARKET My Website My Facebook Account My Facebook Page My Linkedin Profile _____________________________ CONTENT ABOUT HIS BLOGG 1. Computer Network 2. What Is Internet 3. Network Architecture 4. Osi Refrence Model 5. Operating System 6. Internet Protocol (Ip) 7. Internet Protocol Types 8. Port Number 9. Mac-Address 10. WHAT IS HUB 11. WHAT IS SWITCH 12. WHAT IS ROUTER 13. WHAT IS NETWORK 14. NETWORK CABLES 15. ROUTING 16. Data Transmission 17...

Internet Protocol (IP) Address

IP ADDRESS IT IS A UNIQUE ADDRESS THAT WE CAN ASSIGN TO DEVICE .SO THAT DEVICECAN COMMUNICATE WITH EACH OTHER. WE CANNAOT ASSIGN SAME IP ADDRESS IN ANY TWO DEVICES IN OUR NETWORK. IF WE WILL DO THIS THEN IT WILL BE CAUSE A CONFLICT ERROR. TWO VERSION OF IP ADDRESS: 1: IPV4 ; 2: IPV6 ; IPV4 32 BITS AND IPV6 128 BITS. AN IP ADDRESS, OR INTERNET PROTOCOL ADDRESS, IS A SERIES OF NUMBERS THAT IDENTIFIES ANY DEVICE ON A NETWORK. COMPUTERS USE IP ADDRESSES TO COMMUNICATE WITH EACH OTHER BOTH OVER THE INTERNET AS WELL AS ON OTHER NETWORKS. TO FIND THE IP ADDRESS CLASS WE NEED TO LOOK AT THE FIRST DIGIT OF THE IP ADDRESS. AND BY LOOKING AT THE FIRST DIGIT, WE CAN GUESS THE SUBNET MASK TO WHICH CLASS IT BELONGS. CLASS A IP ADDRESS SUBNET MASK 255.0.0.0 CLASS B IP ADDRESS SUBNET MASK 255.255.0.0 CLASS C IP ADDRESS SUBNET MASK 255.255.255.0 IANA TABLE IP RANGES IANA ( Internet Assigned Numbers Au...

Learning Networking

Search This Blog