Technical

1. Tracer discovere is a command which can show you the path a packet of information takes from your computer to one you specify. It go away dip all(prenominal) the routers it passes through until it reaches its destination, or fails to and is discarded. In addition to this, it will tell you how long each hop from router to router takes.
Tracert domain_name
Next it gives information active each router it passes through on the way to its destination.
1 is the earnings gateway on the network this traceroute was done from (an ADSL modem in this case)
2 is the ISP the origin computer is connected to (xtra.co.nz)
3 is also in the xtra network
4 prison termd out
5 - 9 are all routers on the global-gateway.net.nz network (the domain that is the internet gateway out of new Zealand)
10 - 14 are all gnaps.net in the USA (a telecom supplier in the USA)
15 - 17 are on the nac network (Net Access Corporation, an ISP in the New York area)
18 is a router on the network mediacollege.com is hosted on
and finally, line 19 is the computer mediacollege.com is hosted on (sol.yourhost.co.nz)
This is extremely useful when trying to watch over out why a website is unreachable, as you will be able to see where the connection fails.



If you have a website hosted somewhere, it would be a good idea to do a traceroute to it when it is working, so that when it fails, you can do another traceroute to it (which will in all probability time out if the website is unreachable) and compare them. Be aware though, that it will probably take a different route each time, plainly the networks it passes through will generally be very similar.

2. To progress a connection, TCP uses a three-way handshake. Before a client attempts to connect with a server, the server must startle bind to and listen at a port to undecided it up for connections: this is called a passive stretch out. Once the passive open is seted, a client may initiate an active open. To establish a connection, the three-way (or 3-step) handshake occurs:
1. SYN: The active open...If you want to cash in ones chips a full essay, order it on our website: Orderessay



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