0
votes
3answers
36 views

Role of OSI layers when we open a url in browser?

I have searched on this topic a lot but I am not able to understand how and where OSI layers (Application, Presentation, Session, Transport, Network, Datalink, Physical) come into picture in the whole ...
1
vote
1answer
94 views

Getting corrupted data from the Internet - shouldn't TCP checksums prevent this?

The last 3 days, I've been getting corrupt data when surfing and downloading from a 3G internet connection. This is easiest tested by downloading a zip file from anywhere (e.g. ...
0
votes
1answer
14 views

View connection messages [closed]

I'm investigating some bugs on a Android Application, that uses a Third-party plugin. I need to view all connections messages between this plugin and a server. There is some way to list all send ...
6
votes
1answer
110 views

If a major telco line is cut to a region of the world, is the “Internet” still available for sites served from within that region?

Can the Internet work independently within various regions of the world or are there safeguards in place that take down portions of the Internet-network (yes, I see the redundancy) when a major telco ...
0
votes
1answer
101 views

Opening multiple web links causes pages to 404 or timeout

I'm using chrome/firefox on windows 7, on fiber, at the office. When browsing the web and opening multiple concurrent pages some of them will 404, timeout, or hang. This doesn't seem to happen to ...
2
votes
1answer
13k views

TCP segment of a reassembled PDU

In wireshark sometimes I see this: 478195 5738.896809 192.168.1.79 61.213.44.124 TCP [TCP segment of a reassembled PDU] What is a PDU? Was it reassembled? What does this mean?
1
vote
2answers
158 views

Route Local Network through Server?

This may or may not be an easy question, as I'm somewhat uninformed in the networking side of computer science. I own a rented server with a static ip address. Is there a way that I can forward ...
10
votes
18answers
8k views

Can the Internet work without DNS?

If we have an IP-based system of identifying nodes on the Internet why is there a need for DNS?