Download Absolute Beginner's Guide to Personal Firewalls by Jerry Lee Ford Jr. PDF

By Jerry Lee Ford Jr.

Absolutely the Beginner's consultant to private Firewalls is designed to supply simplified, but thorough firewall details at the such a lot regular own firewall software program purposes to be had for the non professional firewall patron. furthermore, it deals info and hyperlinks to sites that can assist you attempt your safeguard after your own firewall is put in

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Extra resources for Absolute Beginner's Guide to Personal Firewalls

Sample text

Of course, the only way that you can find out whether you have any DSL service restrictions is to contact a local ISP that provides DSL service. Although both cable and DSL provide high-speed Internet access, cable represents a shared connection with your neighbors whereas DSL employs dedicated communication lines between your house and the telephone company. This means that your cable connection might slow down noticeably as more people in your neighborhood come online. The next two sections explore the strengths and weaknesses of cable and DSL in greater detail.

A network protocol is a set of rules, standards, and procedures for communicating and exchanging data over a network. There is only one set of protocols used on the Internet and they are collectively known as TCP/IP. 3 where each layer of protocols depend upon the services of the layer below. Your connection from your home PC to your local cable or telephone ISP is an Ethernet connection. Ethernet is itself a protocol. However, it is a lower-level protocol and is used to transport the higher-level TCP/IP protocol.

Com The following example shows the partial results of such a test and indicates that the maximum latency experienced was 30ms (millionths of a second) for any hop. You should run this test against your ISP and any other sites where you spend a lot of time. When determining your latency, use the highest value of any hop. 169 33 Low latency is generally considered to be 100ms or less. High latency is above 200ms. A normal rate is somewhere in between. If you are experiencing normal latency, you should adjust your computer’s TCP/IP receive window to 32KB.

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