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4
votes
3answers
1k views

What are ports and protocols really?

I hear people talk about ports and protocols (in relation to computer networking), and they often provide analogies for them (for example: "a port is much like a shipping port, it sends and receives ...
2
votes
2answers
238 views

Is the sound quality of wireless earbuds inherently limited? [closed]

There are many different types of devices that emit sounds directly to the ear, ranging from the wired headphones often used by audiophiles —I presume— to the wireless earbuds often used ...
1
vote
0answers
192 views

Allow only HTTP/HTTPS comunication with Agitum Outpost Security Suite Free

Hi I use Agitum Outpost Security Suite Free and I would like allow only HTTP(80) a HTTPS(443) protocols for IN/OUT and also allow local ports for Oracle database, etc. I try use Network Rules -> ...
0
votes
1answer
119 views

IPv4 address to Netmask mapping and Multiple default routes feasibility?

We have, Class Range NetMask Bits Bits hosts# ---------------------------------------------------------- A 0-127 255.0.0.0 8 24 16777216 (i.e. ...
7
votes
4answers
1k views

Is there a good example for acknowledged, connectionless network protocol?

According to what I've read, there are three main connection types in computer networks: Unacknowledged, connectionless (e.g. UDP) Acknowledged, connectionless (e.g. ?) Acknowledged, ...
2
votes
2answers
356 views

CSMA/CD network protocol (Ethernet)

I hope I'm in the right stackexchange subsite (can't seem to find a networking related subsite..). I've got 2 questions concerning the CSMA/CD network protocol: Before sending some (say 5) messages ...
1
vote
3answers
296 views

How do I forward TCP from one IP to another?

Here's a thing: I have a piece of software listening on 127.0.0.1:port and only (I can choose the port). I want it to work as a server and accept connections from outer network. How can I forward the ...
14
votes
5answers
36k views

how does 'ping' command really work?

How does the ping command really work? Specifically where does the ARP (Address Resolution Protocol) come into picture? I was asked this question in an interview and I was not able to come up with ...
0
votes
3answers
6k views

How do I “telnet into [my] favourite Web server”?

I'm reading a book about programming, and I want to check an HTTP response message. The book is instructing me to telnet into your favorite Web server. Then type in a one-line request message for ...
1
vote
3answers
3k views

Finding the external (PPPoE, WAN) MAC address of an ADSL router

My ISP is Orange Internet, I have recently ditched my crummy "livebox" and moved to a more stable BT Business Hub with the firmware flashed back to the original SingTel ROM. The thing works great ...
17
votes
5answers
9k views

Ethernet vs TCP vs IP?

What is the difference between Ethernet, TCP, and IP in simple (simple abstract) terms? Please do not copy from Wikipedia...
0
votes
3answers
61 views

How does the home wireless perform if it connects to a public access point?

Assuming that there is a access point(hotspot) covering a dozen of houses. Besides, these houses also have their own wireless network. So, if everyone in each house connect to the Internet at the same ...
0
votes
1answer
127 views

http in web browser address bar

If we type a domain name in a web browser address bar, how will it discover the correct protocol for that domain ? Example: If we type linkedin.com in a web browser address bar, how does it know to ...