QuickTimeª and a mpeg4 decompressorare needed to see this picture.
Who cares?• Todays Internet is Communication, coordination, information and pleasure• How many of you would be living here if there was no Internet?
Getting there• Free is good, Internet Para todos• http://www.internetparatodos.gob.pa• Not in Boquete, but in David• The New Library, Free Wifi
Your home• Cable Onda• Cable and Wireless• Wireless Radio • Mobile Net • Planet Telecom • Internet Activo
It’s all Plumbing QuickTimeª and a mpeg4 decompressor are needed to see this picture.
Internet Everywhere• Cellular Networks • 3G • 4G • more G • convergence
Data Flows• clean pipes, big pipes & good fittings• valves need to route correctly• the bits and bytes need to flow
Addresses• The Internet uses IP (Internet Protocol)• 4 Bytes of 8 bits, example : 220.127.116.11• Binary 10011101.10100110.11111111.00010011• or decimal 2644967187• or using DNS, this is CNN.COM
DNS• Domain Name Services • the user friendly way to find things • When DNS fails IP addresses will work
DNS the Movie QuickTimeª and a mpeg4 decompressor are needed to see this picture.
It’s not working• Tools • Ping • Traceroute • Use an IP address
Ping• Ping is the most basic tool to see if you are connected • Command: Ping www.cnn.com or • Ping 18.104.22.168• Ping will send a series of packets to CNN and see how many arrive and how long it takes.
Reading Ping• Ping has started…PING www.prensa.com (22.214.171.124): 56 data bytes64 bytes from 126.96.36.199: icmp_seq=0 ttl=37 time=192.454 ms64 bytes from 188.8.131.52: icmp_seq=1 ttl=37 time=543.085 ms64 bytes from 184.108.40.206: icmp_seq=2 ttl=37 time=194.372 ms64 bytes from 220.127.116.11: icmp_seq=3 ttl=37 time=186.664 ms64 bytes from 18.104.22.168: icmp_seq=4 ttl=37 time=192.023 ms64 bytes from 22.214.171.124: icmp_seq=5 ttl=37 time=199.200 ms64 bytes from 126.96.36.199: icmp_seq=6 ttl=37 time=216.314 msThe Internet Control Message Protocol (ICMP) is one of the core protocols of the Internet Protocol Suite. It is chiefly used by the operating systems of networked computers to send error messages indicating, for example, that a requested service is not available or that a host or router could not be reachedTime to live (TTL) is a mechanism that limits the lifespan of data in a computer or network.The TTL field is set by the sender of the datagram, and reduced by every router on the route to its destination. If the TTL field reaches zero before the datagram arrives at its destination, then the datagram is discarded and an ICMP error datagram is sent back to the sender. The purpose of the TTL field is to avoid a situation in which an undeliverable datagram keeps circulating on an Internet system, and such a system eventually becoming swamped by such "immortals"
• Where is the data going?• Traceroute has started… Trace Routetraceroute: Warning: prensa.com has multiple addresses; using 188.8.131.52traceroute to prensa.com (184.108.40.206), 64 hops max, 72 byte packets 1 192.168.100.1 (192.168.100.1) 3.326 ms 1.287 ms 7.789 ms 2 172.18.1.1 (172.18.1.1) 3.239 ms 6.914 ms 2.638 ms 3 172.18.4.2 (172.18.4.2) 12.983 ms 7.148 ms 5.395 ms 4 172.16.40.4 (172.16.40.4) 8.973 ms 10.388 ms 22.286 ms 5 172.18.254.2 (172.18.254.2) 25.073 ms 24.256 ms 25.792 ms 6 172.18.252.1 (172.18.252.1) 27.169 ms 27.294 ms 26.896 ms 7 172.18.250.1 (172.18.250.1) 27.890 ms 21.755 ms 19.871 ms 8 172.18.249.1 (172.18.249.1) 34.698 ms 19.131 ms 18.981 ms 9 172.18.248.2 (172.18.248.2) 12.875 ms 12.854 ms 18.891 ms10 10.8.128.117 (10.8.128.117) 20.653 ms 27.455 ms 18.190 ms11 10.9.67.173 (10.9.67.173) 19.693 ms 22.080 ms 35.225 ms12 10.255.0.74 (10.255.0.74) 41.143 ms 29.987 ms 36.154 ms13 ge-0-0-0.bal1-int-1.jf1-agr-1.cwpanama.net (220.127.116.11) 34.489 ms 32.623 ms 117.649 ms14 so-6-0-1.mia11.ip4.tinet.net (18.104.22.168) 98.414 ms 90.499 ms 102.931 ms15 xe-0-3-0.van10.ip4.tinet.net (22.214.171.124) 205.199 ms 208.110 ms 229.033 ms
The Programs• Macintosh • Applications • Utilities • Network Utility
Windows• Go to command prompt and type • ping cnn.com or ping ip address • tracert cnn.com or ip address