Cuba USA
The Internet is, as its name implies, a network of networks. A data packet is sent from a particular computer on one network across the Internet to the receiving computer on another network. As the packet moves from network to network, it goes through special purpose computers called routers.
Traceroute is a simple utility program that comes with every Mac or Windows computer. It shows the path a packet takes -- the list of routers that handle it -- as it hops from network to network.
A colleague in Cuba recently ran Traceroute to see the path between his computer, which was on a dial-up link, to Google in California. He saw that the packet hopped through 20 routers:
- Tata Switches From Satellite To Cable And Fidel Likes To Surf The Web
Doug Madory of Renesys, an Internet monitoring company, has reported that Cable and Wireless is no longer carrying traffic between Jamaica and Cuba, Telefonica is carrying less traffic than previously, and Tata is carrying more. Furthermore, the Tata...
- Connectivity Remains Slow And Variable
A colleague in Cuba ran traceroute from a computer on a dial up link in Havana to several destinations in Cuba, Venezuela and the US. The following table shows the round trip latency time for three tests to each destination: As you see, the international...
- A Conversation With A Cuban Telecommunication Engineer
I asked for input and test runs from people in Cuba in a recent post, and I've had an interesting email conversation with a telecommunication engineer who says he has never worked in that field. He asked me not to share his name or email address....
- Network Performance Testing
I've been busy with teaching and a curriculum development project, and have neglected this blog. Sorry. About a month ago, I tried a data gathering experiment. I created a simple survey on underground TV viewing in Cuba, hoping that Cubans would...
- Cuba Needs A Domestic Upgrade To Utilize The Alba Cable. Will China Help?
Commemorating 50 years of Cuba-China relationsThe Cuba-Venezuela undersea cable will soon be operational. In our report on the Cuban Internet, we discussed the cable and China's role in its financing and construction. We mentioned a report stating...
Cuba USA
The Internet route from Cuba to Google
Traceroute is a simple utility program that comes with every Mac or Windows computer. It shows the path a packet takes -- the list of routers that handle it -- as it hops from network to network.
A colleague in Cuba recently ran Traceroute to see the path between his computer, which was on a dial-up link, to Google in California. He saw that the packet hopped through 20 routers:
- 192.168.254.69
- 192.168.254.65
- 192.168.254.77
- 192.168.254.229
- 200.0.16.130
- 200.0.16.114
- 200.0.16.101
- 204.14.41.33
- 204.14.40.9
- 207.45.197.197
- 64.86.83.190
- 64.86.138.114
- 66.198.111.65
- 216.6.87.9
- 74.125.50.230
- 216.239.46.248
- 209.85.248.73
- 209.85.254.235
- 216.239.46.78
- 74.125.93.99
The prefix of the first four hops (192.168) indicates that they are within the ISP's local area network. The next three are on the network of ETECSA, the Cuban telecommunication monopoly. I saw that by querying the "whois" database that shows that the IP addresses that begin "200.0" have been allocated to:
owner: CUBADATAThe eighth hop is over a satellite link from the router at the edge of the Cuban network to the network of Newcome International in Miami. I know it is a satellite link because Traceroute reported that the time to reach from Cuba to the 8th router was much longer than from Cuba to the 7th router. Newcome routes packets across their network from Miami to Newark New Jersey and eventually to Google.
responsible: Rafael López Guerra
address: Ave. Independencia y 19 Mayo, s/n,
address: 10600 - La Habana - CH
country: CU
phone: +53 7 574242
e-mail: [email protected]
No secrets are revealed here -- this sort of information is widely available -- but it would be interesting to see how routes and timing (which we looked at in a previous post) change when the undersea cable is operational. If you are in Cuba and would like to share this sort of route and timing data, let me know.
- Tata Switches From Satellite To Cable And Fidel Likes To Surf The Web
Doug Madory of Renesys, an Internet monitoring company, has reported that Cable and Wireless is no longer carrying traffic between Jamaica and Cuba, Telefonica is carrying less traffic than previously, and Tata is carrying more. Furthermore, the Tata...
- Connectivity Remains Slow And Variable
A colleague in Cuba ran traceroute from a computer on a dial up link in Havana to several destinations in Cuba, Venezuela and the US. The following table shows the round trip latency time for three tests to each destination: As you see, the international...
- A Conversation With A Cuban Telecommunication Engineer
I asked for input and test runs from people in Cuba in a recent post, and I've had an interesting email conversation with a telecommunication engineer who says he has never worked in that field. He asked me not to share his name or email address....
- Network Performance Testing
I've been busy with teaching and a curriculum development project, and have neglected this blog. Sorry. About a month ago, I tried a data gathering experiment. I created a simple survey on underground TV viewing in Cuba, hoping that Cubans would...
- Cuba Needs A Domestic Upgrade To Utilize The Alba Cable. Will China Help?
Commemorating 50 years of Cuba-China relationsThe Cuba-Venezuela undersea cable will soon be operational. In our report on the Cuban Internet, we discussed the cable and China's role in its financing and construction. We mentioned a report stating...