TCP & UDP Difference

[Apollyon255]

ello evrybody! i'm newly registered user in this forum...

winsock prorgramming is my favorite part in vb, and im only using tcpProtocol in my programs, but i want to know it's differnce from UDP, i haven't tried yet udpProtocol...

please explain me further about this matter...

Thankz....

[Pino]

Welcome to the forums,

I like you really enjoyed winsock in Vb6 and found it an interesting part of programming, I have moved to .NET now so its been a while. Anyhows enough of my life story,

UDP - Is connectionless, and coannot establish a connection. TCP has to be connected.

(This is you wisock.Listen, and winsock.connect routine)

Udp is faster than TCP, (For small apckets of data)

UDP packets are not guarenteed to get to there destination, they may be lost on way. TCP is 99% guaranteed to get there.

So really UDP is faster but not as safe as TCP. If you are writing somthing such as a chat application go with TCP, UDP is sued in the game sindustry becasue if a client misses a packet they can catch up on the next one (In high action games)

Hope that gives you a little help

Liam

[Apollyon255]

Thankz a lot pino...

I've read a lot of your threads and msg,
juz wanna ask you one more thing bout winsock...

Can winsock have the capability to connect a client with a server tru internet or wan??

then if so, what IP address, port no or sumthin' will used to connect,,,
cuz i know accdg to my Cisco prof, that in WAN, internal IP address
of the local computer remains private when it is connected to net,
cuz it uses Gateways, Subnets, Network address, and other Protocols of WAN...

Thankx again...

BuB'

[Pino]

Hmm yes its should be able to I've never tried it over a WAN but have ove rthe internet (Just use the standard IP (www.Whatismyip.com)) and over lan you can just use the ip you get from ipConfig.

As i say i'm not sure about WAN i understand briefly what they are but have no experiance using them.

Hope that helps you

Pino

[Apollyon255]

Oh, ic...

well, maybe i should research some more info bout WAN programming over winsock..

thankz for helpin'... if there anybody can contribute bout my concern, or anybody knows bout it, your comment and help will greatly appreciate...

thankz..

BuB'

[visualAd]

The Internet is a WAN , so yes, winsock can be used to connect over a WAN. Its the job of the routers and gateways to route IP datagrams to their correct destination, not your application. So as long as you know the IP address or the host name of the client / server you wish to connect to, there is no problem.

[Pino]

Thats what i suspected. But wasnt 100% cheers visualAd

[Apollyon255]

yeah... right! but i don't even got any idea on how to access to a WAN connection since i only know LAN and winsock connection...

Here's what i want,,, i've almost finished my project in VB, a Client/Server Timer prorgram for my Friend's Internet Cafe' that will automatically lock, unlock and release a remote host over LAN, now, He got 2 branches of the cafe' , couple of Km apart (to0 impractical to connect it using LAN) anyway, i want them both connected using my program, my only prob is... no, the BIG problem is to connect it over WAN or internet... any more help??....

thankz for comments - appreciated...

by the way I am using a DSL connection...

Thatz ol...

BuB'

[Pino]

Using winsock ove rthe internet is no differanat than using it over a lan.

[daytripper]

Using winsock ove rthe internet is no differanat than using it over a lan.

I wish it was no different. haha. computers behind routers are giving me a really hard time because several computer have the same IP.
apolly: if both of the computers aren't behind a router, go to www.whatismyip.com and use the ip you see there to connect. if they are... i can't help you (i'm trying to figure that one out as we type).

[Pino]

I wish it was no different. haha. computers behind routers are giving me a really hard time because several computer have the same IP.
apolly: if both of the computers aren't behind a router, go to www.whatismyip.com and use the ip you see there to connect. if they are... i can't help you (i'm trying to figure that one out as we type).

Try the routers port forwarding control, I have a webserver/ftp sever running on one of my pc's behind a router. I just foward all data on a certain port to the local IP of my server computer.

It really is no differnace in the use of winsock. Hardware configurations are the users problem

[daytripper]

Try the routers port forwarding control, I have a webserver/ftp sever running on one of my pc's behind a router. I just foward all data on a certain port to the local IP of my server computer.

It really is no differnace in the use of winsock. Hardware configurations are the users problem

thank you for the advice, i heard about doing that but it's not user friendly... at all. people hear the word "configurations" and go "ahhhhhhh!!!!". haha. i made another topic last night asking for another way. i don't think anyone's responded.

[dee-u]

I hope you could find something useful here.