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FAQ RevisionsEditor: ThirdShifter See Profile
Last modified on 2007-08-08 08:24:24

6.Networking

·Can I use VPN with my Streamyx?
·Can I setup a Home network?
·What is NAT?
·What are nodes?
·What are packets?
·What is latency?
·What is packet loss?
·What is Traceroute and how do I do it?
·What is PING and how do I do it?
·What is a router?
·What is a Switch?
Yes you can, As long as you know your IP address and Hop to the VPN Forum to set one up.

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Yes you can. In the TOS (term of service) stated that you cannot re-sell the service unless you subscibe to the Bussiness Plan. In another way.. if its for free yes.. If your charging for it. No

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What is NAT? (#7001)

An Acronym Network Address Translation. To understand what the hell is that? and how it works.. Hmmm.. read this

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Nodes are internet connections between you and a remote host (e.g. www.dslreports.com) normally pass through a series of intermediate points ("nodes") where routers (special-purpose routing computers) send them on the proper link to the next node. Problems can result when routers or links get overloaded, or when routing information (the Internet "map") gets messed up, as sometimes happens.

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Packets are data that is transmitted over the Internet in packets (chunks of data). The TCP/IP Internet protocol is designed to detect and automatically correct packet transmission problems (if possible).

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Latency is simply the round-trip time it takes for a packet to reach a remote point (node) and a response to get back to you, typically measured in thousandths of a second (milliseconds, or simply "ms"). When everything is working properly, the latency of consecutive measurements will be consistent and in a normal range (40 ms to 200 ms for cable modem or DSL, higher or lower for other forms or broadband). Erratic latency is a sign of trouble.

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When everything is working properly, each data packet should reach its destination. However, when there are problems with links or routers (e.g. overload), packets may be lost. It takes considerable time to detect and resend a lost packet, so performance drops dramatically with even a relatively small amount of packet loss. As a rule of thumb, packet loss should be less than 1 percent. Packet loss of more than 5 percent is serious.

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Traceroute is used to trace the path between you and the remote host as a series of nodes and the links between them. Typically it displays three latency measurements for each node and looks up node names if it is available. Under Windows it's called "tracert," as in the examples below. If you use Linux, substitute "traceroute" for "tracert." Here's the command used to start a traceroute. Go to your command prompt and type in the command like below and hit enter.

c:\>tracert www.techtv.com

tracert www.TechTV.com
Tracing route to www.techtv.com [64.95.116.134] over a maximum of 30 hops:

1 21 ms 17 ms 15 ms gateway.example.net
2 18 ms 18 ms 21 ms internal.example.net
3 19 ms 20 ms 17 ms border.example.net
4 21 ms 19 ms 21 ms 500.Serial2-11.GW3.SFO4.ALTER.NET
5 19 ms 20 ms 18 ms 129.ATM2-0.XR1.SFO4.ALTER.NET
6 19 ms 20 ms 19 ms 191.ATM6-0.GW4.SFO4.ALTER.NET
7 25 ms 25 ms 26 ms internap-gw.customer.alter.net
8 24 ms 24 ms 26 ms border5.ge3-1-bbnet1.sfo.pnap.net
9 26 ms 26 ms 26 ms techtv-1.border5.sfo.pnap.net
10 28 ms 24 ms 25 ms 64.95.116.134
Trace complete.

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PING sends a special packet designed to get a response back from a particular remote node. It's usually possible to send several or even continuous PINGs in succession, and the latency of each PING is commonly displayed. "-n 10" is used to send 10 PINGs:

c:\>ping -n 10 www.TechTV.com
Pinging www.TechTV.com [64.95.116.134] with 32 bytes of data:
Reply from 64.95.116.134: bytes=32 time=26 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=23 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=22 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=22 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=23 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=22 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=24 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=25 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=26 ms TTL=47
Reply from 64.95.116.134: bytes=32 time=22 ms TTL=47
PING statistics for 64.95.116.134:
Packets: Sent = 10, Received = 10, Lost = 0 (0 percent loss),
Approximate round-trip times in milliseconds:
Minimum = 22 ms, Maximum = 26 ms, Average = 23 ms

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A router is a device that forwards packets between networks. The forwarding decision is based on network layer information and routing tables, often constructed by routing protocols. The router is connected to at least two networks and decides which way to send each information packet based on its current understanding of the state of the networks it is connected to.

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A switch is similar to a hub, except that it registers the IP addresses of the computers plugged into it. When it receives a message, it only sends it to the intended recipient. Switches cut down on unnecessary traffic broadcasts and allow you to have an affordable high-performance network.


Switches are used to connect computers on the same network; they do not provide Internet access. You can still share your Internet connection through one of the computers on your network, however, as your network grows, you will see performance degrade. When one computer has to manage the Internet connection, it slows down network performance. If the main computer crashes, all of the other computers will lose their Internet connection. For increased performance and functionality, you need a router.

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