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Summary of wireless network security methods

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Firefox has search field in the browser that saves plenty of time, however initially all searches opens in the same you working. To overcome this problem some changes have to be made in Firefox configuration file. To do so you have to:

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Time to time you have to clean up your PC to make space for new applications or just simple reinstall old one, because of some bizarre reasons, simple stopped working. Firefox browser makes this process simple, yes I know you can install additional backups to do your job, but do we really want it?

Before you start your backing up process, open your Firefox browser, navigate to Help and select" and select "Troubleshooting Information". That page shows you basic information about your Firefox browser.

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There are various ways to use goggle to find what you are looking for. Just open a browser, type your search query and whoola - thousands of thousands of pages are waiting for you. Are you sure you go search like this?

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Best Practices for Speeding Up Your Web Site according to yahoo is to follow basic steps. For more information please visit developer.yahoo.com/performance/rules.html

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Handy website penetration tool.

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How to display PHP errors in the browser if you do not have access to php.ini file or server configuration files.

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Small table showing differences and similarities between EIGRP and OSPF routing protocols

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• 100 Continue
• 101 Switching Protocols
• 200 OK
• 201 Created

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The User Datagram Protocol (UDP) is one of the core members of the Internet Protocol Suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network without requiring prior communications to set up special transmission channels or data paths.

UDP applications use datagram sockets to establish host-to-host communications. An application binds a socket to its endpoint of data transmission, which is a combination of an IP address and a service port. A port is a software structure that is identified by the port number, a 16 bit integer value, allowing for port numbers between 0 and 65535. Port 0 is reserved, but is a permissible source port value if the sending process does not expect messages in response.

Thanks Wikipedia

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The Transmission Control Protocol (TCP) is one of the core protocols of the Internet Protocol Suite. TCP is one of the two original components of the suite, complementing the Internet Protocol (IP), and therefore the entire suite is commonly referred to as TCP/IP. TCP provides the service of exchanging data directly between two network hosts, whereas IP handles addressing and routing message across one or more networks. In particular, TCP provides reliable, ordered delivery of a stream of bytes from a program on one computer to another program on another computer. TCP is the protocol that major Internet applications rely on, applications such as the World Wide Web, e-mail, and file transfer. Other applications, which do not require reliable data stream service, may use the User Datagram Protocol (UDP) which provides a datagram service that emphasizes reduced latency over reliability.

Thanks Wikipedia

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Directly Connected Routes

Static Routes include the network address and subnet mask of the remote network, along with the IP address of the next-hop router or exit interface. Static routes are denoted with the code S in the routing. Static routes should be used when a network consists of only a few routers, a network is connected to the Internet only through a single ISP or a large network is configured in a hub-and-spoke topology.

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Download from http://dev.mysql.com/downloads/ website two files:

• mysql-5.0.27-win32.zip
• mysql-gui-tools-5.0-r6-win32.msi (Windows Installer)

The first file contains only a setup file for installing MySQL server using the Wizard. It is a much less painful process than installing PHP. All you have to do is to choose the correct options when prompted for server installation and instance configuration.

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Before you attempt to install PHP 5.2.0 on your computer make sure that you have already have the following in place.

• Operating System: Windows XP Profession, SP2.
• A working web server. Here I recommend IIS 5 (Internet Information Services) or higher version which is a built-in component of Windows XP.

To check whether you have the IIS installed go to Start –-> Control Panel –-> Administrative Tools and see if you have a shortcut for Internet Information Services. If yes, check if the web server is functioning properly by opening the Internet Explorer and type in http://localhost/iishelp/in the address bar. You should see both IIS Documentation page and XP web server confirmation page pop up on your screen. Otherwise, you will have to reinstall the Web Server.

To install IIS go to Settings –-> Control Panel –-> Add/Remove Programs –-> Add/Remove Windows Components. Check IIS box and then look at the details to see if all services such as WWW Publishing, FTP, and SMTP etc. have been selected. Make sure at WWW Publishing must be checked. Click on Finish. IIS will now be installed and started.

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Go to the folder "cd1" and click Setup. This will start the installation.

Configuration

Prior to the installation you will be asked a couple of questions.
Here are some answers:

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MSSQL database is a tricky one and to insert special character into SQL Database we need to use the special character (')it itself.

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Various paper sizes in inches and millimetres

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Useful feature to limit text to specific number of characters

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HTML List of countries

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To replace white spaces in PHP

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Stop form input fields caching

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($count == 0 ? \'true\"\' : \'false\')

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If you need to return a unique MSSQL id number the easiest way to it would be to use the code line below.

Basically what it does it returns last id number from inserted line

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To print all session variable's a neat small line will do the trick

' . print_r($_SESSION, true) . '

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EIGRP autonomous system number

EIGRP AS number have to be the same across the network to advertise connected interfaces accross the network. In order to so in global configuration mode:

x.x.x.x - network address

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To stop continues ping using Cisco equipment you have to use CTRL + ^ command

Within Windows command line (cmd) you have to press CTRL + c command

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Firefox has in-built spell checker, however is it only works in Text areas. To use it across in text boxes you have:

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enable
configure terminal
logging synchonous
hostname
no ip domain-lookup
enable secret
banner motd & !!Only Authorized access!! &
line console 0
password
exec-timeout 0 0
login
exit
line vty 0 4
password md5 exec-timeout 0 0
login
exit
int fa0/0


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Metrics used in IP routing protocols include:

• Hop count - Number of routers a packet must traverse.
• Bandwidth - Bandwidth of a specific link.
• Load - Traffic utilization of a specific link.
• Delay - Time a packet takes to traverse a path.
• Reliability -- Probability of a link failure, based on the interface error count or previous link failures.
• Cost - Determined by either the Cisco IOS application or the network administrator to indicate preference for a route. Cost can represent a metric, a combination of metrics, or a policy.

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The subnet mask indicates whether hosts are in the same network. The subnet mask is a 32-bit value that distinguishes between the network bits and the host bits. It consists of a string of 1s followed by a string of 0s. The 1 bits represent the network portion and the 0 bits represent the host portion. The network bits are compared between the source and destination. If the resulting networks are the same, the packet can be delivered locally. If they do not match, the packet is sent to the default gateway.

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A different connector is used in an Ethernet-based LAN environment. An RJ-45 connector for the unshielded twisted-pair (UTP) cable is the most common connector used to connect LAN interfaces. At each end of an RJ-45 cable, you should be able to see eight colored strips, or pins. An Ethernet cable uses pins 1, 2, 3, and 6 for transmitting and receiving data.

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The Layer 2 data link frame usually contains header information with a data link source and destination address, trailer information, and the actual transmitted data. The data link source address is the Layer 2 address of the interface that sent the data link frame. The data link destination address is the Layer 2 address of the interface of the destination device. Both the source and destination data link interfaces are on the same network. As a packet is forwarded from router to router, the Layer 3 source and destination IP addresses will not change; however, the Layer 2 source and destination data link addresses will change. This process will be examined more closely later in this section.

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The Internet Protocol defines the IP packet format. The IP packet header has specific fields that contain information about the packet and about the sending and receiving hosts. Below is a list of the fields in the IP header and a brief description for each one:

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• Central Processing Unit (CPU) executes operating system instructions, such as system initialization, routing functions, and switching functions.
• Random-Access Memory (RAM) stores instructions and data needed to be executed by the CPU. RAM is volatile memory and loses its content when the router is powered down or restarted. However, the router also contains permanent storage areas, such as ROM, flash and NVRAM.

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A router connects multiple networks. This means that it has multiple interfaces that each belong to a different IP network. When a router receives an IP packet on one interface, it determines which interface to use to forward the packet onto its destination. The interface that the router uses to forward the packet may be the network of the final destination of the packet (the network with the destination IP address of this packet), or it may be a network connected to another router that is used to reach the destination network.

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