More about computer ports.
Basic is that we must now that we have a hardware and software ports.
Firs are used for connect external devices to our computer like mouse, printer, monitor ...
My scripture will be based on to software ports. This ports enable to use of our stocks to other applications and devices. Simplified said this are like door of large skyscraper and through them is possible to enter into rooms. Therefore ports enables communication on physical level of our computer. Here is brought up new theme how computer works. This subject is too extensive so let say just that we have more levels. DOS level is very important for computer. This level supervises entire activity of system. We can even say that this is brain of computer. So DOS all know and all see and if we know correct orders this informations thy say also to us. We can utilize the netstat command to view currently active connections that include ports currently being used. This command most be typed in to command prompt. Hire is an example of commands end explanations:
NETSTAT [-a] [-e] [-n] [-s] [-p proto] [-r] [interval]
-a Displays all connections and listening ports.
-e Displays Ethernet statistics.
-n Displays addresses and port numbers in numerical form.
-p proto Shows connections for the protocol specified by proto; proto may be TCP or UDP.
-s option to display per-protocol statistics
-r Displays the routing table.
-s Displays per-protocol statistics. By default, statistics are shown for TCP, UDP and IP; the
-p option may be used to specify a subset of the default.
interval Redisplays selected statistics, pausing interval seconds between each display. Press CTRL+C to stop redisplaying statistics. If omitted, netstat will print the current configuration information once.
For understanding of got results we must of curse know bases of TCP, UDP, IP, DHCP and NETBIOS protocols
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6 comments:
Dear Bogdan,
your posts are quite a challenge to me. Can you tell me why should a computer user know about computer ports?
For mean users of computer knowledge about ports is not important.
If we install server or if we wish to link during network in point to point mode a computer. Then is good to know something of how to control our network traffic. A computer ports are entrusted to made an virtual connections trough network. With their help our system becomes multi operating – they ashore multiple access for applications to cardinal data units.
We can also say ports interfaces are ways that allows a user to interact with the computer over a network. An interface may also refer to controls found on a software program to interact with that program. Port adjustment allows us to control incoming and outgoing traffic. A bit of people has enough knowledges for operating with ports. This for us usually do programmes which are called fire walls. The order of fire walls is to control who and haw are accessing to our system. Settings of fire walls are typical and sometimes unsuitable. It happened that we are against to world too much opened or closed. The consequences can be that we stays without access. Computers without connection with global network are nearly disabled in contemporary informational world. The world of multi users. Movement between this wast multitude of users can sometimes be dangerous. For example when someone hurts or steals our data.
Let's look some ports and their meaning:
Port Protocol Description
21 TCP FTP-Control
22,5631
5632 UDP PCAnywhere
24 Private e-mail
38 TCP,UDP Route Access Protocol
53 Domain Name System
66,118
150,156 SQEL Services
80,280,443 HTTP
109,110,993 POP
5800 5801
5900
5901 Virtual Network Conections
6667 IRC
6801 Voip
7070
7075 Real Audio
This is too much for me. Next year I will go to course for programmers or something like that.
Thank you. :-)
You guide us when we have Abolnar Simon and you help us to uderstand whats up.
Thanks for such an interesting post. I always get confused with ports. Are they always something you can plug hardware into or can you get soft ports.
I will be back to read the blog again. I have found that Interoute have a great product -
ethernet reach
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