What is a TCP port and how is it used during connections?

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The transmission control protocol (TCP) provides an additional level of naming that helps organize data transfer between computers connected to the internet. In addition to the internet protocol (IP) address that identifies a computer, TCP adds two port numbers that identify a connection between two computers. Packets that are part of a connection flow between the computers the same way at the IP layer, but the port numbers allow TCP to separate connections when packets arrive at the endpoints.
Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo).
Part of the www.internet-c... online internet course. A blue Systems Research Group (blue.cse.buffa...) production.

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3 окт 2024

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Комментарии : 62

@AshleyFerguson-yc7zd 9 месяцев назад

Simple, clear explanantion; straight to the point; very easy to understand what's going on. Thank you!!

@alex-dc2zx 4 года назад

so glad that jesse pinkman found his passion in IT!

@AbhinavSingh-oq7dk 3 года назад

XD XD XD

@ismailakbar6449 2 года назад

Does the TCP have it's own port number I don't understand this question could you guys help me out. Which of the following protocols operates without a port number assignment? A. SNMP B. AFP C. TCP D. SSH

@1fashionsouls Год назад

@@ismailakbar6449 tcp is the answer because it doesnt operate using a set of ports. TCP is a set of rules or standards

@nehoha 4 года назад

Just my 2 cents. This is only half explanation about the used ports. On both sides, local ports are getting assigned when the connection is being established. IP+Port = Socket. Two sockets are used for TCP communication. The server's listening port (80 in your example) is only used for establishing a connection by the client. After that the pair ServerIP:ServerLocalPort and ClientIP:ClientLocalPort are participating in the communication. These local ports are randomly assigned. This, I believe, needs to be explained in this video as well.

@ismailakbar6449 2 года назад

@TheMrCalindo 5 лет назад

clear and simple , you're a great professor . greetings from tunisia

@CreativeSource1 4 года назад

I love La Marsa very much

@ismailakbar6449 2 года назад

@waldhoer 5 лет назад

Very clear and understandable explanation! Thank you!

@travisstase1577 4 года назад

Great breakdown, wish I had him as a prof.

@nemonemo252 5 лет назад

That was a slam SLAM DUNK ! Thank you.

@Nick-wz6tz 4 года назад

very well explained, thank you

@youmisco5438 4 года назад

Explained it that simple!!! Thank you!

@dorianbrown1588 5 лет назад

Excellent Explanation!

@ByDawnsEarlyLight 4 года назад

Thanks! This helps a lot! C From Maryland USA

@marekzak6951 4 года назад

very well explained, thank you

@neonspark7178 3 года назад

Thank you so much for this explanation.

@rosekimu2115 2 года назад

Simple to understand.thank you

@develop_it 2 года назад

thanks! your explanation was awsome

@ashleygarica4017 2 года назад

Thank you! Great explanation.

@thereason1010 5 лет назад

Great explanation. Thanks sooo much!

@moderndaypoet2518 5 лет назад

Nice! This was well explained. Thank you very much! :)

@gerooq 4 года назад

this was awesome, thankyou

@navneetkrishnasrivastava9521 4 года назад

Well explained...Thank you!!!

@ariakelatwang4312 5 лет назад

Thanks for the example..

@jesusloveschickens3127 Год назад

Thank you very much!

@mikea-111 4 года назад

Good explanation thanks. But did you just redefine numbers? 10003 is not one thousand and three. It is ten thousand and three.

@ameenalibrahim7396 2 года назад

Excellent

@ФиданИбрагимова-я5ф Год назад

THANKS SOOOO MUCH!!!

@riskexperts 5 лет назад

very good explanation. thank you

@varunn8 3 года назад

excellent!

@simoshbaniorganist3346 3 года назад

👍Thank you teacher ❤️

@JoeStraw 2 года назад

Thank you!

@archerline 3 года назад

good video, the only thing missed was writing out the colon and port number next to the ip to wrap it up

@ismailakbar6449 2 года назад

Does the TCP have it's own port number I don't understand this question could you help me out. Which of the following protocols operates without a port number assignment? A. SNMP B. AFP C. TCP D. SSH

@sausytime 5 лет назад

Very well done.

@georgebeierberkeley 5 лет назад

Hey that was really useful.

@Triskaidekaphobi4 2 года назад

Thank you

@burbsl1672 2 года назад

THANK YOU

@mohamedel-shamy1945 4 года назад

1 year ago That was a slam SLAM DUNK

@darrenz5557 3 года назад

http on 80 is just convention or is it possible to set it to 25?

@jhonfaith3122 Год назад

nice 👍

@drygordspellweaver8761 3 года назад

Can you expand on remote ports vs local? Say I want an inbound rule for windows defender to accept all connections addressed with port 1234... should that be the local port or remote?

@davidsenneker7260 3 года назад

So if u get this right, every port has its own task. Like you said 1001 till 1005 is used for the website for example. So how do i know what port are used by my Xbox for example? I want to open the ports, and i have to add new "command" in the list if you know what i mean..so is there a way to check this?

@ismailakbar6449 2 года назад

Does the TCP have it's own port number I don't understand this question could you help me out. Which of the following protocols operates without a port number assignment? A. SNMP B. AFP C. TCP D. SSH

@benedictsimpson6953 4 года назад

What I'm curious about are ports say between two site to site VPN connections. My guess is they would be listening on the one port only at both ends to keep the tunnel for eg. Openvpn using 1184 only on both sides? so I'm assuming here that no Ephemeral ports are used at all? does anyone know for sure? thanks

@abinandhu8638 4 года назад

Nice one

@ismailakbar6449 2 года назад

Does the TCP have it's own port number I don't understand this question could you help me out. Which of the following protocols operates without a port number assignment? A. SNMP B. AFP C. TCP D. SSH

@adnaansyed3189 2 года назад

thanks

@redluck01 10 месяцев назад

I always explain it by telling people that the IP gets you to the machine then the port gets you to that individual application on that machine. I work on IBM mainframes so we have hundreds of applications on one machine which requires hundreds of ports on one machine.